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HP Color LaserJet 2550 Service Manual EN

1. Developing A S a E E gt a S S KEE rotary motor Laser scanner uni GE Formatter i Doum Il BD PCB Scanner motor Laser driver PCB Operation i panel 31001 Hale alle 331 J321 ECE b EE 1 bel o E je loko neo Joe Scola 33333333 SES ILL 00001 E o REN 030088055 do sE oos zZ Z zzz zZ zZ zz PAA lelali e 522525552582 aso 055 gt d i ERES o Sigal enel exes S a gt Eggs DEE Ee EE Saro 0000 edel all selte ele aj VULVA 3114 J115 J139 J125 J105 J103 009 EE elt aja ajo je lo ajo i i i 500 sheet feeder 500 sheet feeder gla gt 00 Ox mx lt 300
2. 11003 42 3 3V_ 2f 1401 P i Power switch Inlet 3301 1 GND 1 ower supply Sg J402 J403 C o A LIT LEIT 000 Ela jo elo ajo 10 oN foo 2 9 0 loo leed DEE EE Fuser ke p Fuse D Z 2121 tm 2 lt lt lt lt azis SSS Sooo vooal eE Uy ZO az aaa 2 ZZ 02 5 Silo a au 1 0 2 gt 0 00 0 0 0 OL eg iat J202 oes eo feu noo so a lalo o elk Jele 2 GU Ke yA ba Kg Q h J134 J141 Internal temparature DI R J126 detection thermistor i 00 DC controller PCA 1137 i aloe 1 SLVTH PALO 1 Thermoswitch 1 Cooling fan 2 GND TP EIDA 3 3 ia S FM721 p125 l Dei 34 3 FANID 1 AE S A 2 2h4 p42 FANIS 24 E SR 1 24VGND 3 ina 201 J201L TH2 1 4 kel 7 3 3V 1 7 7 7 32200 CO mets Jet sH 6 FSRTH2 2 i i 6 THI 6 Pin Pin J220L j Enda t 7 RIA 4 a ngaging motor E St gaging J704 3 FSROUTS 5 3 PM704 43 4 DEVMOUTA 2 GND 6 2 J203 Developing rotary yd BEN E 7 i 1 ISE i toner level 131 DEVMOUTB 3 PS1 detection PCA e l 7X 1 Developing rotary Fuser delivery home position sensor Print cartridge sensor PS51 motor J705 J106 PM705 4ry4 SLVMOUTA 1 Registration 2kai SLVMOUTA 2 Z SLVMOUTB 3 3107 sensor Ia SLVMOUTB 44 J127 PS711 J511 J512
3. Internal components 1 of 2 Figure 7 3 ENWW 250 Chapter 7 Parts and diagrams Table 7 5 Internal components 1 of 2 i ENWW Internal assemblies 251 sW2 ee Ee A a 9 Y Figure 7 4 Internal components 2 of 2 252 Chapter 7 Parts and diagrams ENWW Table 7 6 Internal components 2 of 2 3 i ENWW Internal assemblies 253 A e Y 10 LD S 11 Pea J701 4 DCM701 Figure 7 5 Main drive assembly 254 Chapter 7 Parts and diagrams ENWW Table 7 7 Main drive assembly ENWW Internal assemblies 255 Rear frame assembly Figure 7 6 ENWW 256 Chapter 7 Parts and diagrams ENWW Table 7 8 Rear frame assembly COMET Jeecaer Cn CIN Internal assemblies 257 L PS71 1 L Middle frame assembly Figure 7 7 ENWW 258 Chapter 7 Parts and diagrams Table 7 9 Middle frame assembly E 3 ENWW Internal assemblies 259 Table 7 9 Middle frame assembly continued gt z 7 S x S z z S x x a x x y 5 i z S 260 Chapter 7 Parts and diagrams ENWW ENWW Internal assemblies 261 PS712 R A J511M J512F 2 TEN D Rotary carousel assembly Figure 7 8 ENWW 262
4. Replacing the separation pad in optional tray 2 or in optional tray 3 1 Remove the tray from the printer and place it on a flat surface Remove any paper from the tray ENWW User replaceable parts 57 2 Locate the separation pad in the base at the inside front edge of the tray 3 Press the large metal plate at the bottom of the tray down Insert a flatblade screwdriver in the slots on each side of the base and push the tabs out of the slots Note In a 250 sheet tray the plate locks down in a 500 sheet tray hold the plate down manually 4 Pull the separation pad up and out of the tray 58 Chapter 3 Maintenance ENWW 5 Use one hand to position the new separation pad above the empty base Align the grooves on the sides of the pad with the sides of the base and then slide the pad down until the tabs snap into the slots on the base ENWW User replaceable parts 59 8 When the green Ready light is on press Go to print a Demo page which verifies that the printer works and that installation is complete 9 Ifthe page does not print or to find additional help go to www hp com support clj2550 Note If the page does not print reconnect the power cable Make sure that the Ready light is on and that no other lights are on or blinking Make sure that print media is loaded and that all parts are installed correctly 60 Chapter 3 Maintenance ENWW Cleaning the printer During the printing
5. 6 0 noqy enyebau serq op Jeisuen Mewnud SL eanisod seiq op saysuey Aewnd DI seiq op Buidojaneg 94L UL moo serq op Buido arap Ale xny SL serq op Buibreyo Arewud PL DER uone o4 esimy90 9 une EL seq oe BulBseyo Avewud El d jnoqy B sse AQ S zemoqy ee SOZWd sozow abpuieo WA ZL mu d E zomo eam O L Suonio esuoto POZNA 100w Du epe H rees Iw l e619 prouajis seddoys Aro Burdojenag OL E 99 TE WO DIAN S0ZIND 00w Aego Buldojenag comen f 6z moqy z o moqy 1719 yoinp vopensibay Sp moqy DOE X VAN ZE MOI somo 9 JO W10 A 40 Ag 26718 prouajos dn yaid Aea 02d 10 0w Jasny LOZINOG Jojo ure LZZIN uey Duo 8 i noqy Er Moqy d dO L euis snouo4you s feo LH 1923y Jesny JOJO mue spuoses puewwoo JUL asuenbas p ds jewuou apou 10 09 ouow ay ul Jaded pewou suo uo Bunuud Jo yeyo Bull e hart one page full color normal speed iming c General t Figure 6 7 229 Troubleshooting tools ENWW Locations of connectors Figure 6 8 Locations of printer connectors 1 of 3 230 Chapter 6 Troubleshooting ENWW
6. e Front lower cover see Front lower cover Open tray 1 Press the multipurpose roller cover not shown inward toward the printer and then grasp the top edge to remove it Lift tray 1 slightly to align the notch callout 1 in the tray 1 cover callout 2 with the hinge pins of the tray 1 hinges callout 3 Push the left tray 1 hinge to the right while pulling the tray 1 cover to the left to carefully disengage the hinge pin from the tray 1 cover Disengage the right tray 1 hinge callout 4 from the tray 1 cover Removal and replacement 133 7 Close the tray 1 guide callout 5 open the tray 1 cover and then slide the tray 1 cover to the left to remove it from its pins Figure 5 32 Removing tray 1 1 of 2 8 Disengage the left and right hinges from the tray 1 guide and then slide both of the hinges off of their keyed holes callout 6 in the printer 134 Chapter 5 Removal and replacement ENWW 9 Use needle nose pliers to unhook two springs callout 7 one at each side of the tray 1 guide and then remove the tray 1 guide Figure 5 33 Removing tray 1 2 of 2 Reinstallation tip The two springs should remain attached to two pegs inside the printer If the springs are not attached use needle nose pliers to reattach them before reinstalling the tray 1 guide Tray 1 separation pad assembly 1 Remove tray 1 see Tray 1 multipurpose tray ENWW Removal and replacement 135 2 Remove one screw
7. elf the problem is not resolved see lf the problem is not resolved Page skew AQBbCc AQBbCc AQBobCc AQBbCc AQBbCc e Make sure that the paper or other print media is loaded correctly and that the guides are not too tight or too loose against the stack See Loading media e Check the paper type and quality Use a different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e Clean the printer see Cleaning the printer e Calibrate the printer see Calibrating the printer elf the problem is not resolved see lf the problem is not resolved ENWW Solving image quality problems 197 Wrinkles or creases AaBbCc e Make sure that paper is loaded properly e Turn over the stack of paper in the input tray or try rotating the paper 180 degrees in the input tray e Open the rear output door to print to the straight through paper path e Check the paper type and quality Use a different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications eo Reseat the fuser elf the problem is not resolved see lf the problem is not resolved Toner scatter outline e Turn over the stack of paper in the tray e Clean the density sensor and perform a cali
8. 1 S 94 O m Ch O E Dl CO Ley Sa pm lel EA A A AAA 1 SSS mm Print cartridge area This area contains a section for each of the print cartridges and provides information about HP print cartridges This information includes the part number for each print cartridge whether each print cartridge is low and the life remaining for each print cartridge expressed as a percentage as a graphic and as the estimated number of pages remaining This information is provided only for HP supplies If a non HP supply is installed you see an alert message instead Imaging drum area This area contains the same information for the imaging drum that the print cartridge area provides for the print cartridges 226 Chapter 6 Troubleshooting ENWW ENWW 3 Warranty Note This section contains information about how the printer warranty is affected when you use non HP supplies It also requests that you call the HP fraud hotline if a supply that is being detected as a non HP supply was sold to you as a genuine HP supply See the HP Color LaserJet 2550 Series Printer User Guide for information about the HP fraud hotline 4 Ordering Information This section contains basic information about how to order new HP supplies 5 Recycling Information This section contains information about the Web site you can visit for information about recycling Repetitive image defects Use a ruler to measure occurrences of repetitive i
9. J720 lei a a Zo z N ho 2 E ll a Ka fo oye Ee rd be Quo ag aros gt s J zlalez a a DJs zg B D E Beal aos xo Wie go oo O N oO Lo o Az 250 ZEE A FVN jejo ale YN E Solo mojo aj olal ofal oaj XJT pA KLEL J104 J113 J118 J138 J109 J108 Figure 6 14 Main wiring 1 of 2 234 Chapter 6 Troubleshooting ENWW
10. Removing the transfer roller Feed drive shaft 1 Remove the following covers and assemblies Right and left side covers see Right and left side covers Toner catch tray see Toner catch tray Transfer roller plate see Transfer roller plate Transfer roller see Transfer roller 2 Remove one screw callout 1 from the gear cover and then lift the gear cover to remove it Lift the belt roller callout 2 from its hooks 4 Use a small flatolade screwdriver to slide the clip toward the back of the printer and then pry the feed drive shaft callout 3 off of the hooks that secure it to the printer Unless the feed drive shaft itself is damaged there is no need to remove the shaft 5 Use a small flatblade screwdriver to pry four pulleys callout 4 from their hooks Removal and replacement 153 6 After the feed drive shaft and the pulleys are released remove the timing belt callout 5 and the small feed belts by sliding them off of the right end of the feed drive shaft Note Callout 6 shows the roller on the fuser wrap jam sensor The roller must be removed first if you want to remove the ECU pan the bottom plate of the printer Figure 5 53 Removing the feed drive shaft Reinstallation tip Examine the timing belt callout 5 before removing it from the printer The leading and trailing sides of the ridges are different and the belt must be reinstalled correctly to prevent media feed problems ECU
11. The Type or Size setting does not match the Using the HP LaserJet Toolbox change the size of paper or print media loaded in the tray Type or Size setting for the tray to match the size of print media that is loaded Media is loaded in tray 1 Remove any media from tray 1 The printer pulls from tray 1 if you did not specify a tray that had a compatible size or type loaded and tray 1 is unconfigured Printer does not pull paper from optional tray 2 or optional tray 3 The rear paper length guide optional tray 2 or To set the rear guides properly see Loading the rear paper stop optional tray 3 is set optional tray 2 or Loading optional tray 3 incorrectly 208 Chapter 6 Troubleshooting ENWW ENWW Table 6 10 Solving general printing problems continued Printer does not pull paper from optional tray 2 or optional tray 3 The tray is not recognized in the printer software Configure the printer software to recognize the tray If the printer does not pull paper from either tray Try a different type or brand of paper the problem might be the paper Make sure that you are using a high quality paper made for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications or to order media The separation pad and the pick up rollers might Replace the separation pad and pick up rollers be worn out See Table 3 1 Life expectancies of supplies for order
12. oooonnnccccnnnnccccconnacccccnnnoncccnnnnanccnnnnannncnnnnnn 216 Functional CHECKS errereen nirani n Eann e atte eee a NAKNA CAREER EE AARAA ENNEA EAEE 218 Se IERT 218 High voltage power supply check 0 0 0 eee tenes terete ee eee tees eee eeeeeeetieeeeeetieeeeeree 219 Paper path CHECK EE EE 219 Service Mode FUNCTIONS 0 0 ee eer entre teeter ener KENAAN AKANA EEREN AAEN E 221 Cold ME 221 NVRAM initializer eee cece ceeeee eee eee ee ee eeceee ee eeeeeeeeneeeeeceneeeeeecneeeeseneaeeeseeeeeeseaeeeseeaeees 221 Error EPO EE 222 Super NVRAM mmttalzatton eaaeceeeeeeeeeesecaaaaeeeeeeeeeeeeeeeeseaaees 222 Network Card cold reeet oi e a 222 Using PJL commande arririk inaia iain 223 Troubleshooting Ke EE 225 SIMO MDAC EE 225 Configuration PAGE EE 225 Supplies Status Page cccccccceceeceeceeceeeeeeeeeceneeeeeeeeeeeseaaeaeeeeeeeeeseaaeeeeseeseseeccieeeeeeeeeeees 226 Repetitive image detects unn eo iateetoeteeeictanees 227 Chapter contents 167 General timing Cafe 228 Locations of CONNECHOSS cccccccecccceseeeeeecececeaneaaeseceeceeeeeaueaseseseceeeeeauaaeeeeeeeeeaeaaaneseeeees 230 De controller CONNE CONS ie adissage ere dees lacie litio ees Age aen 233 Main wiring diagrami EE 234 HP Laserdet TO0IDOX niinen AA ge E ees 236 To view the HP LaserJet Toolbox ren iini iten e e a A E 236 168 Chapter 6 Troubleshooting ENWW Basic troubleshooting ENWW Table 6 1 Basic troubleshooting Does the printer turn on succes
13. JL E i Auxiliary cleaning transfer belt roller cleaning roller Secondary transfer roller Dc controller lt gt High voltage transformer HVT VIDEO signal Print command l Formatter i I J Figure 4 14 Image formation system 84 Chapter 4 Theory of operation ENWW Figure 4 15 ENWW Image formation process Laser printing requires the interaction of several different technologies including electronics optics and electrophotographics to produce a printed page Each process functions independently and must be coordinated with the other printer processes Image formation consists of the following five processes 1 Latent image formation 2 Developing 3 Image transfer 4 Fusing 5 Transfer belt cleaning The five processes are divided into twelve steps which are shown in the Image formation process graphic and are described in the following sections 1 Electrostatic latent image formation block A 2 Laser beam exposure 1 Primary charging 2 Developing PF block j 96 Auxiliary development i 5 Transfer belt cleaning block lt Paper path lt t Directions of rotation Image formation process Latent image formation stage Image formation system 85 Figure 4 16 Figure 4 17 Step 1 primary charging A dc bias is applied to the primary charging roller which transfers a unifor
14. LAR Figure 5 13 Removing the fuser motor Dc controller 1 Remove the following covers and assembly e Right side cover see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies 2 Unplug the flat flexible cable callout 1 Release the cables from two cable holders callout 2 4 Unplug one cable connector callout 3 by pressing and releasing the tab on the side of the connector 5 Unplug two cable connectors callout 4 by releasing a clip on each connector see the detail in the lower left corner of Figure 5 14 Removing the de controller ENWW Removal and replacement 117 6 Unplug the remaining 24 cable connectors and then remove the two screws callout 5 at the bottom of the dc controller before removing two screws callout 6 at the top of the dc controller LS Figure 5 14 Removing the dc controller 7 Lift the dc controller up and then away from the printer Reinstallation tip The connection that remains empty upon reinstallation is shown in callout 7 in Figure 5 14 Removing the dc controller The connection is used to flash the dc controller Optional tray 2 250 sheet tray 1 Remove the Right and left side covers see Right and left side covers 2 If optional tray 3 is installed lift the printer and optional tray 2 up and away from optional tray 3 118 Chapter 5 Removal and replacement ENWW 3
15. ceeeeeeceeeeee cette eee teeta eee eet aaeee eee NANEN ANNEER KREERT SEa 150 Tromer Catch tray iii ii 151 Transtersroller plate scooter 152 Transtertoller cial T 152 Feecd drive Sha Mica id daa 153 ECU Re CR 154 Sub high voltage transformer DCH 157 High voltage transformer PCA cccccnncccccnnononcnncnnnnonccnnn nan nncnn nano nc nn 158 Low voltage PLA A cias 159 v vi Paperlop E Ee 160 Fuserwrapsensgor sioda an aaia aa a aaa R RR RR a aia a iaaa 161 250 sheet feeder pickup roller A 162 500 sheet feeder pickup roller A 163 6 Troubleshooting Chapter Contemts sciiiraiai a a a a aaO Basic troubleshooting coooononcccnnnoncccnnnoncccnononcnccnnannnc nano nc nr cnn nar nnno rar rana rra 169 Clearing Bu 171 Where to look fOr jams oooocoonoccccconcccccnnoncccnononcccnanoncnc nono nn cnn anne 171 To clear jams from inside the printer oiocoonnnininnnnnncoconnnacocanonanarn nar onnn nan r narran 171 To clear jams from input areas 0 eee eect e reece ee ee nn nc cnn narran rra 172 Bee Tele ube ue EE 174 Control panel light MESSAGES o oo eee cece eee eeee eee eeee corno nc cnn rc rr 176 Supplies Status lu 177 Printer Status lights 2 00 0 ce tr een nee nono nn cn naar nn cnc eee ries eee an nr cnc naar nnccinnns 182 Solving image quality problems oooociinninnicinnniiccian tc 190 Print quality checklist AE Solving image quality problems all print jODS ooooonnoniccnnoncicinnnnnacccccnnnnarcccnnnnracccnnnn 190 Solvi
16. oocooononcccccnococccccnnnnoncnnncnnnnnncnnnan nn cc conan nn cnc nana n nc nn naar nnnccnnnns 254 Rear frame assembly cion ds 256 Middle frame assembly c oooccoonoccccconnocccccononcncconannnccnn ano no ncnnnnn nn cnn cnn nnncnnanncnnnnns 258 Rotary carousel assembly c oooooooccccnncocccccononncnccnnnncncnn nana n non nano nnccnnnanannncnnnns 262 Power supply Dase assembly conccccccnnocccccconocnccccnononcnncnnnnnncccnn nan nncncnnnnnnncnnnnns 264 Rotary drive assembly cere eeeeee tree ee eee eeeeeeetieeeeetaeeeeertieeeeeree 266 PCA assemblies icici NeENKEENE NENNEN EEN lt NENNEN 268 xiii xiv ENWW Product information Chapter contents ENWW Chapter contents ebessi beetebuerg deele di ilatina PRINtEF CONMG UAT OMS iria dia aii ib ai 2 HP color Lasertet 29500L cacon iii lana a a ada A andas 2 HP color LaserJet 2pbOl mn 2 HP color LaserJet att fe kee ERNEIEREN 3 Printer Te Ue seiss Seed aia A Kul ge ET 7 Hardware components ooococcccccccccccononnononncnncnnnnnnnnnn nen nn nn cnn nn nn nana nnn nn nn nn nnnnnnnnnnnnnnnnnmnnrrnnrnninins 7 Model and serial numbers ssssssossnnnneensteestennrenstaesttnttnnraestttttnnnnns taent enntnn nna nn nn nnnn nnmnnn 7 Software components A 9 Software and supported operating SYSteMS oooooccocococcccccccccncccccnnnnnnnnononnnnnnnnnnnnnnnannn nn nenne enn 9 SOMWarE TIPS EE 10 Software Tor WINDOWS inicial ii ida 11 Software for Macintosh A DD Uninstalling the printing software occ teeter
17. ot Residual toner Y O Y W Stirrer Waste toner case Dc bias positive Step 11 drum cleaning Print cartridge The printer has four print cartridges yellow magenta cyan and black Each print cartridge contains a developing cylinder toner feed roller and stirrer The developer motor rotates these parts so that each print cartridge can use toner to form a visible image on the drum The carousel motor rotates the E label reader which communicates E label information to the dc controller Image formation system 93 Figure 4 28 The developing rotary toner level detection PCB uses an LED light emitter and a photodiode light receiver to determine the toner level in each print cartridge De controller Developing rotary toner level detection circuit ENGAGING MOTOR DRIVE signal TONER CARTRIDGE MOTOR DRIVE signal Toner cartridge motor Toner cartridge data Engaging Rotary engaging sensor motor yagny i Engaging fee EE Memory tag E d contact i Photosensitive drum i Toner level sensor light emitter Developing cylinder Toner level sensor ping cy light receiver Print cartridge Imaging drum E label The E label is nonvolatile memory which is built into the imaging drum and stores usage information When the imaging drum is installed in the printer the E label makes constant contact with the E label reader The E label reade
18. CAUTION ENWW Rotate Carousel button OS When the top cover is closed pressing Rotate CAROUSEL rotates the print cartridge carousel to bring the next print cartridge into the top position The light for the print cartridge that is approaching the top position blinks quickly two or three times Imaging drum light This light indicates when the imaging drum is low light is on or empty or missing light blinks The light also indicates when a non HP imaging drum is installed the light blinks and the Attention light is on Understanding Printer Status The printer has two buttons and three lights to indicate and control the printer status To interpret and troubleshoot the control panel light messages see Control panel light messages Cancel Job button When the Ready light is blinking pressing CaNceL Jos cancels the current job When the printer is not experiencing an error pressing Go and O CanceL Jos simultaneously prints a Configuration page and a Supplies Status page If an HP Jetdirect print server is installed an HP Jetdirect page also prints e When a Supplies Status light is blinking and the Attention light is on indicating that a non HP supply has been installed pressing O Cancel Jos allows you to continue printing You might not receive any indication when a non HP supply is empty If you continue printing after the supply is empty damage to the printer can occur See Hewlett Packard lim
19. HP 04 or cloned 14 Note Although HP supports customer choice HP cannot guarantee the quality or reliability of non HP supplies Service or repairs required as a result of using a non HP supply are not covered under the printer warranty The imaging drum light is blinking and the Attention light is on The printer stops printing ENWW Control panel light messages Recommended action If you want to use this non HP print cartridge press Cancel Job to continue printing To ensure full availability and or accuracy of printing features such as remaining supply status use genuine HP supplies If you believe you purchased a genuine HP supply go to www hp com go anticounterfeit If you want to use this non HP print cartridge press Cancel Job to continue printing To ensure full availability and or accuracy of printing features such as remaining supply status use genuine HP supplies If you believe you purchased a genuine HP supply go to www hp com go anticounterfeit If you want to use this non HP imaging drum press Cancel Job to continue printing To ensure full availability and or accuracy of printing features such as remaining supply status use genuine HP supplies If you believe you purchased a genuine HP supply go to www hp com go anticounterfeit 181 Printer Status lights The following section describes the meaning of the light patterns in the Printer St
20. Remove one screw callout 1 from optional tray 2 Figure 5 15 Removing optional tray 2 1 of 2 4 Remove one screw callout 2 from the left side of the printer 5 Remove two screws callout 3 from the back of optional tray 2 ENWW Removal and replacement 119 6 Grasp the printer frame on each side and then carefully lift the printer off of tray 2 e S Figure 5 16 Removing optional tray 2 2 of 2 Carousel engagement motor 1 Remove the left side cover see Right and left side covers 2 Unplug one cable connector callout 1 3 Remove two screws callout 2 4 Rotate the motor counterclockwise to clear the metal lock tab 120 Chapter 5 Removal and replacement ENWW 5 Lift the carousel engagement motor away from the printer to remove it Figure 5 17 Removing the carousel engagement motor Front lower cover 1 Remove the Right and left side covers see Right and left side covers 2 Use the small flatblade screwdriver to lift the plastic catch callout 1 off of the tab on the left side of the printer ENWW Removal and replacement 121 3 Pull the cover away from the printer to remove it gt J gt Figure 5 18 Removing the front lower cover Back cover 1 Remove the Right and left side covers see Right and left side covers 2 Use a flatblade screwdriver to release two internal tabs callout 1 one at each side of the cover 122 Chapter 5 Remo
21. Sensor PS718 Table 7 4 on page 247 Sensor density RH7 7146 000CN Table 7 4 on page 248 Sensor top of page RG5 6966 000CN Table 7 4 on page 248 ENWW Alphabetical parts list 275 Table 7 14 Alphabetical parts list continued Sensor transfer PS720 Table 7 9 on page 260 Sensor waste toner Table 7 4 on page 248 Separation pad assembly Table 7 4 on page 247 Shaft feed drive Table 7 9 on page 259 Shaft idler gear Table 7 9 on page 259 Solenoid SL92 Table 7 4 on page 247 Solenoid SL93 RH7 5340 000CN Table 7 12 on page N o a Spring RB3 0045 000CN Table 7 9 on page 259 Spring RB3 0016 000CN Table 7 9 on page 259 Spring RB3 0042 000CN Table 7 9 on page 259 Spring Table 7 9 on page 259 Spring Table 7 9 on page 259 Spring Table 7 9 on page 259 Spring Table 7 9 on page 259 Spring Table 7 9 on page 259 Spring left RB3 0122 000CN Table 7 4 on page 247 Spring on off switch Spring tray 1 guide Table 7 4 on page 247 Static charge eliminator plate RB3 0009 000CN Table 7 9 on page 259 Sub high voltage transformer PCA RG5 7124 000CN Table 7 11 on page 265 Sub high voltage transformer PCA RG5 7124 000CN Table 7 13 on page 269 276 Chapter 7 Parts and diagrams ENWW Table 7 14 Alphabetical parts list image se EEN Description Table and page Support high voltage PCA VT2 0012 005CN Table 7 11 on page 265 Toner sensor PCA RG5 6964 000CN Table 7 10 on page 263 Toner sensor PCA RG5 6964 000CN Tab
22. Table 7 4 on page 247 Table 7 4 on page 247 Table 7 4 on page 247 Numerical parts list 279 Table 7 15 Numerical parts list continued Part number Table and page RB3 0160 000CN Table 7 4 on page 247 RB3 0286 000CN Table 7 9 on page 259 RB3 1065 000CN Table 7 8 on page 257 RB3 1088 000CN Table 7 9 on page 260 RB3 1091 000CN Table 7 9 on page 260 RB3 1092 000CN Table 7 9 on page 260 RB3 1094 000CN Table 7 9 on page 260 RB3 1108 000CN Table 7 4 on page 247 RB3 1110 000CN Table 7 9 on page 259 RB3 1112 000CN Table 7 3 on page 245 RB3 1113 000CN Table 7 5 on page 251 RB9 0879 000CN Table 7 10 on page 263 RB9 0880 000CN Table 7 3 on page 245 RB9 0881 000CN Table 7 3 on page 245 RB9 0884 000CN Table 7 3 on page 245 RB9 0886 000CN Table 7 3 on page 245 RB9 0889 000CN Table 7 4 on page 247 RB9 0890 000CN Table 7 4 on page 247 RB9 0897 000CN Table 7 4 on page 247 RB9 0901 000CN Table 7 5 on page 251 RF5 4012 000CN Table 7 4 on page 247 RF5 4047 000CN Table 7 4 on page 248 RF5 4063 000CN Table 7 7 on page 255 RF5 4065 000CN Table 7 9 on page 260 RF5 4067 000CN Table 7 9 on page 260 RF5 4068 000CN Table 7 5 on page 251 RF5 4069 000CN Table 7 3 on page 245 RG5 6880 000CN Table 7 6 on page 253 RG5 6897 000CN Table 7 5 on page 251 RG5 6907 000CN Table 7 6 on page 253 RG5 6935 000CN Table 7 6 on page 253 RG5 6938 000CN Table 7 4 on page 247 RG5 6939 000CN Table 7 9 on page 259 280 Chapter 7 Parts and diagrams ENWW ENWW Tabl
23. e HP has no controls or processes to ensure that a refilled cartridge functions at the high level of reliability of a new HP LaserJet print cartridge HP also cannot predict the long term reliability effect on the product from using different toner formulations found in refilled cartridges e The print quality of HP LaserJet print cartridges influences the customer s perception of the product HP has no control over the actual print quality of a refilled cartridge e Parts that are critical to print quality might not be replaced when the cartridge is refilled with toner HP LaserJet printing supplies In many countries regions this product s printing supplies for example the print cartridge can be returned to HP through the HP Printing Supplies Returns and Recycling Program An easy to use and free take back program is available in more than 30 countries regions Multilingual program information and instructions are included in every new HP LaserJet print cartridge and supplies package HP Printing Supplies Returns and Recycling Program information Since 1990 the HP Printing Supplies Returns and Recycling Program has collected millions of used LaserJet print cartridges that otherwise might have been discarded in the world s landfills The HP LaserJet print cartridges and supplies are collected and bulk shipped to our resource and recovery partners who disassemble the cartridges Remaining materials are separated and converted into raw ma
24. see Solving image quality problems color print jobs Solving image quality problems all print jobs The following examples depict letter size paper that has passed through the printer short edge first These examples illustrate problems that would affect all pages you print whether you print in color or in black only The topics that follow list the typical cause and solution for each of these examples 190 Chapter 6 Troubleshooting ENWW ENWW Light print or fade AABbGc AgBbGc AaBbCc AaBbCc AaBbCc Toner specks AQBoCc AcbECc ACBLCS AdaBbCc AGBODOC BoCa BoCa BoCa BoCa BoCa Vertical lines AQBboCc AaBbCc AaBbCc AaBbCc AQBboCc GO AcOBD Cc AdBk Cc AaBk Cc AadaBbCc AaBzc Gray background Toner smear Repetitive defects on AdBbes AaBbes AaBbeos AGBP AaBbeos AGBP Misformed characters Loose toner AaBbC AQBbCc AaBbc AaBbCc_ AaBbce Repetitive defects on the front AaBbCC AaBpCI AgBboC AaBoC AaBbCC Curl or wave the back Wrinkles or creases AaBbCc AaBbCc Toner scatter outline Random image repetition Solving image quality problems Random image repetition 191 Light print or fade A vertical streak or an incorrect or faded color area appears on the page Aa Ce Aa
25. 212 coverage printer 25 covers back replacing 122 front lower replacing 121 front replacing 130 fuser replacing 104 interface replacing 110 left side replacing 106 locating 7 open detection operations 77 partnumbers 245 right side replacing 106 top replacing 123 covers document 17 curl troubleshooting 197 customer support 238 Cyan print cartridge light blinking 178 180 locating 34 on 177 D dc controller connections 233 E label operations 94 engine control system 70 jam detection operations 77 laser scanner operations 74 pickup and feed operations 75 replacing 117 sequence of operations 70 tray operations 76 declaration of conformity 27 default settings restoring 221 delay jams 77 delivery delay jams 77 delivery roller testing 219 delivery stationary jams 77 demo page printing 225 troubleshooting 169 density sensor 130 troubleshooting 192 developer motor 93 139 developing rotary detection PCA 94 developing system operations 84 86 Device Settings HP LaserJet Toolbox 47 dimensions printer 15 DIMMs configuration page printing 225 part numbers 239 documentation 46 Documentation tab HP LaserJet Toolbox 46 door open detection 77 286 Index door replacing 125 DOS Command Prompt 223 dots per inch dpi specifications 4 downloading drivers 10 dpi dots per inch specifications 4 drive roller 219 drivers downloading 10 Macintosh 12 operating systems supported 9 uninstalling 13 Windows featu
26. 3 Reinstallation tip Insert the metal protrusion at the back of the rotary drive assembly into the slot in the rear frame assembly and then lower the rotary drive assembly into position over the alignment pins Make sure that no cables are pinched Top plate 1 a FON Remove the following covers and assembly Right and left side covers see Right and left side covers Interface cover see Interface cover Formatter cage see Formatter assemblies Back cover see Back cover Top cover see Top cover Remove the air duct see Air duct and fan Unplug the flat flexible cable callout 1 from the laser scanner Release the cables from one cable holder callout 2 Unplug one cable connector callout 3 by pressing and releasing the tab on the side of the connector 142 Chapter 5 Removal and replacement ENWW 6 Unplug five connectors callout 4 from the dc controller Figure 5 41 Removing the top plate 1 of 3 7 Unroute two cables callout 5 Note Examine the routing of the cables If the cables are not reinstalled to their correct routing then the cables can become pinched by other assemblies 8 Unplug two connectors callout 6 ENWW Removal and replacement 143 9 Remove two screws at the left side of the printer callout 7 and then remove the two corresponding screws from the right side of the printer y E ro e QM Kl Removing the top plate 2 of 3 Reinstallation
27. 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 7 1 Figure 7 2 Figure 7 3 Figure 7 4 Figure 7 5 Figure 7 6 Figure 7 7 Figure 7 8 Figure 7 9 Figure 7 10 Figure 7 11 Control panel lights cuca a eh aati ees 176 Manually rotating the print cartridge carousel eee eeeeeeeeeeeeettteeeeeeeaes 217 Location of the engine test switch ee eee cece eeeeneeeeeetaeeeeeenaeeeeeenaeeeeeeaaes 218 Print cartridge high voltage Connection points 2 0 0 eee ee eeeeeeeeeeenteeeeeeeeaes 219 Overriding SW301 and the laser scanner switch ooooonnoniccnonnocccccnnnnanncccnnnn 220 General timing chart WAIT period c ooococccccnnnncccccnnnnaccccnnnorccccnn aaron cnn 228 General timing chart one page full color normal speed ooooccocnnnnniccncc 229 Locations of printer connectors 1 Of 31 230 Locations of printer connectors 2 Of 31 231 Locations of printer connectors 3 Of 21 231 Locations of 250 sheet tray Connectors ce eceeeeeeeeeeeeeteneeeeeteeaeeeeeeeaaeeees 232 Locations of 500 sheet tray Connectors ococccccinnicccnnnnoccccno conc cnnn nan n cnn nan nncn 232 De controller CONNECTIONS oooonnnccccnnnnnnccccnnnnonccccnonarrc cnn a deaa rn 233 Main wiring 1 Of 2 EE 234 Main Wiring 2 08 EEN 235 EE 244 Front frame assembly ccoo eines 246 Internal components 1 Of 21 250 Internal components 2 Of 2 dech cadete arena 252 Main drive assembly
28. 9 1 9 2 9 3 and OS X v 10 1 and later Table 6 11 Problems in the Chooser The printer driver icon does not appear in the Chooser when using Mac OS version OS X The software was not installed correctly The LaserWriter driver should be present as a part of the Mac OS Make sure that the LaserWriter driver is in the Extensions folder within the systems folder If not install the LaserWriter driver from your Mac OS CD ROM The interface cable might not be of high quality Make sure that you are using a high quality interface cable An incorrect network might be selected Make sure that the printer is on the correct network Select Network under Control Panels in the Apple menu and then select the correct network ENWW Resolving problems that did not generate messages 213 Table 6 11 Problems in the Chooser continued The printer name does not appear in the Select a PostScript Printer box in the Chooser The printer might not be ready Make sure that the cables are connected correctly the printer is on and the Ready light is on The correct printer driver might not be selected Make sure that the correct printer driver has been selected in the Chooser for example LaserWriter An incorrect zone might be selected If the printer resides on a network that has multiple zones make sure that the correct zone is selected The PS driver might not be installed Verify that the PS driver is installed The printe
29. Figure 6 9 Locations of printer connectors 2 of 3 Figure 6 10 Locations of printer connectors 3 of 3 ENWW Troubleshooting tools 231 Figure 6 11 Locations of 250 sheet tray connectors J222 J2405 y2402 NUS J2404 Ge e J706 3719 J2403 Figure 6 12 Locations of 500 sheet tray connectors 232 Chapter 6 Troubleshooting ENWW Dc controller connections J103 s10629 i 4 2 CH sur CS 70 v0 771 e o1va pn 19 20YO e r R Ek 40191 vi ae coll Zvi o r z pa ezit secu Ps n 0 ears tamer GC our 8010 9010 4 N N 1c106 re D O ao Ome Ona 14 2 i eg ane swiot std gua se 2 3133 8 SH Se Ya Jne 13 D 7 ee eN A F CE 4 n Pi DI 601vO OIYO IK al E CN A 7019 s d D OI CS Y S tera 1040 D I ae Figure 6 13 Dc controller connections ENWW Troubleshooting tools 233 Main wiring diagram 6 5 4
30. If the media is too difficult to remove clear the jam as described in To clear jams from output areas 5 Press o Go if the Go light is blinking If the Attention light is still blinking then another jam is present See To clear jams from input areas and To clear jams from output areas To clear jams from input areas 1 Open optional tray 2 or optional tray 3 to expose the jam 172 Chapter 6 Troubleshooting ENWW 2 Complete one of these steps e If the media has already partially entered the printer see To clear jams from inside the printer e If the jam is only in the input tray remove the jammed media by pulling it out by the visible edge Realign all of the media in the tray and proceed to step 4 3 If you could not remove the jammed media from inside the printer or by pulling it out of the tray grasp the sheet from the outside of the printer and carefully pull it free 4 Push the paper down to lock the metal lift plate into place and slide the tray back into the printer Open the top cover close it again and then press CG Go if the Go light is blinking If the Attention light is still blinking then another jam is present See To clear jams from inside the printer and To clear jams from output areas ENWW Clearing jams 173 To clear jams from output areas CAUTION Jams in these areas might result in loose toner on the page If you get toner on your clothes or hands wash the
31. Print cartridge TAGCRGA 147 3 Sl al e o e l 3 is T kd memory tag contact GND 3p Liga Aen a OI EI E is D 15 TR2DCD 1 ooo A d D J128 14 TR2PWM ZE Image cartridge TAGIOA 1 13 TRIS 3 D TAGIOB 2 12 RVTR1DCD H memory tag contact GND 34 b411 TRIDCD 5 10 TR1PWM a3 9 CHGCLK 7 ick ia z GHeser g pick up i 7 CHGSFT SE High voltage sioz 6 CHGACPWM TO ly PCA 5 CHGDCPWM Di power supply 4 24VB 12K 3 24VB EI To IOT From PC 2 FSRPWM 143 31503 31502 1 ICLACPWM 15 A Tray 1 0000 XXXX J135 J502 DARDOS paper Se 14 RSVDCD1 1 13 ICLDCPWM ZC J503 J504 12 24VGND 3 Flash relay EE 4 3718 o GND E GND 5 alo ai el J1501 9 ICLCLK 6px o 8 RVICLDCD 7 LE 7 ICLDCD SE ele IDETTE 6 RSVDCD2 El ae DEVDCD 10 sorag Re 4 DEVPWM 11 du 3 PEE gt De ES S 3 RVTR2DCD SC Se y 22398085 Ea alol alo 2 3 3V 13 d Hz gt 129 ae es ESEE oleaje Sz zS EEEa EN TR2S 14 CT 6 o m 4505 J506 ale folol oowoo e ne EEN Sub high voltage LLLI J110 J112 J130 power supply PCA Figure 6 15 Main wiring 2 of 2 ENWW Troubleshooting tools 235 HP LaserJet Toolbox The HP LaserJet Toolbox is only supported for Windows 98 Me 2000 and XP and in Mac OS X v 10 2 or later You must have performed a complete software installation to use the HP LaserJet Toolbox You can view the HP LaserJet Toolbox when the printer is directly connected to your computer or connected to the network The HP LaserJet Toolbox is a Web page that opens in a We
32. United States call toll free 877 219 3183 Outside the United States you can call collect Dial the operator and ask to place a collect call to this telephone number 770 263 4745 If you do not speak English a representative at the HP fraud hotline who speaks your language will assist you Or if someone who speaks your language is not available a language line interpreter will connect approximately one minute after the beginning of the call The language line interpreter is a service that translates between you and the representative for the HP fraud hotline 66 Chapter 3 Maintenance ENWW Theory of operation Chapter contents ENWW ue Wen ET 67 INTOUCUON ceci indi deca 68 Engine control Syste sirrimi anna 70 Basic sequence Of operation cccccccceeeeeeeeeceneceeeeeeeeeesecaeaeeceeeeeeesecsanaeeeeeeeeeeeeneenanes 70 POWEI OMSCQUENCE cidad SEENEN 72 VOTOS NA CL EE 73 Laser scanner System sorrisa iniaa an edel geleed Sud e de Pickup and feed Sylo encorena n AE GENEE ee Paper WAYS TT 76 Jam detecto E 77 PRHOtOSENSOMS AN SWICNES ii caticdiesstarderasanacanddedvaaancvecdsaandacunbandedeessaubecttutanea dando 78 e Ee e ANG CIULCM EE 80 Printed circuit assemblies osioon aa aaan e A aa aaa 82 Image formation SOM E 84 lmMaQe fOrmatlOn ele 85 Latent image formation stage oooooinnocccccnnnocccccccnnonccncnn nn ncnnnnn anno cnc nn nnn nn nc cnn nn nn nn cc c naar a nccnnns 85 Developing Stage ee eee 86 Cl E 87 Fusing stag
33. XXXXXXXXXXX PJL DEFAULT PAGES XXX PJL DEFAULT COLORPAGES XXX PJL SET SERVICEMODE EXIT ESC 12345X The X s in the serial number formatter number pages and color pages fields are variables that you must replace with your printer information The Configuration page contains the actual information for your printer Using the MS DOS command prompt and the MS DOS Editor To enter the PJL commands you must use the MS DOS Command Prompt and MS DOS Editor To open an MS DOS command prompt window in Windows 2000 and Windows XP 1 Click Start and then click Run 2 Type cmd and then click OK An MS DOS command prompt window opens 3 Atthe command prompt type cd and then press Enter To open an MS DOS command prompt window in Windows ME 1 Click Start click Programs click Accessories and then click MS DOS Prompt An MS DOS command prompt window opens 2 Atthe command prompt type cd and then press Enter To open an MS DOS command prompt window in Windows 98 1 Click Start click Programs and then click MS DOS Prompt An MS DOS command prompt window opens 2 Atthe command prompt type cd and then press Enter Service mode functions 223 To open a file in the MS DOS Editor 1 Atthe command prompt C gt type EDIT PJLREST and then press Enter The MS DOS Prompt Edit file window opens To create the escape Esc sequence in the MS DOS Editor 1 Press Ctrl P
34. and left side covers L Feed drive shaft Chapter 5 Removal and replacement L_ ECU pan Sub high voltage transformer PCA L High voltage transformer PCA Low voltage PCA H Paper top sensor Fuser wrap sensor ENWW Removal and replacement Imaging drum 1 Open the top cover 2 Grasp the imaging drum handle and then rotate the imaging drum until the handle is horizontal 3 Lift the imaging drum straight up to remove it from the printer Print cartridges 1 Open the top door 2 Remove the imaging drum see Imaging drum ENWW Removal and replacement 103 3 Pinch together the two large blue tabs on the first cartridge and then lift the cartridge straight up to remove it from the carousel Note If the print cartridge carousel does not rotate see Functional checks 5 Open the top cover and then remove the next cartridge following the procedure in step 3 6 Repeat steps 2 through 5 until all four cartridges have been removed Note When the top door is open the carousel retracts but does not rotate Fuser cover and fuser 1 Turn the printer off 2 Rotate two locking tabs callout 1 upward 104 Chapter 5 Removal and replacement ENWW 3 Gently slide the fuser out of the printer Figure 5 1 Removing the fuser cover and fuser ENWW Removal and replacement 105 Right and left side covers Use the following steps to remove the right side cover Then remove th
35. available 6 Click Next and follow the directions on the screen If the message The following file is a shared file but is not used by any other programs Would you like to delete it appears click Yes to All The system finishes removing files 7 If prompted to restart the computer click OK Uninstalling software for Windows by using Add or Remove Programs An alternate method for uninstalling the printer software is to use the Add or Remove Programs method This method does not require you to have the software CD 1 Click Start point to Settings and then click Control Panel 2 Click Add or Remove Programs Software components 13 3 Scroll through the list of software programs and then click HP color LaserJet 2550 series printer 4 Click Remove Uninstalling software for Macintosh To remove the printing software from your Macintosh drag the HP LaserJet folder and PPDs to the Trash If you are using Mac OS X you must also drag the PDEs to the Trash For Mac OS 9 1 The PPDs are located in Macintosh HD System Folder Extensions Printer Descriptions For Mac OS X The PPDs are located in Macintosh HD Library Printers PPDs Contents Resources lt lang gt lpro j The PDEs are located in Macintosh HD Library Printers PPD Plugins HP The phrase lt lang gt represents the language of the printer software that you selected 14 Chapter 1 Product information ENWW Specifications Table 1 2 Physical specif
36. button will not appear if the printer is directly connected to a computer or if the printer is connected to a network through anything other than an HP Jetdirect print server HP LaserJet Toolbox 47 HP LaserJet Toolbox links The HP LaserJet Toolbox links at the left of the screen provide links to the following options e Select a device Select from all of the HP LaserJet Toolbox enabled devices e View current alerts View the current alerts for all printers that have been set up You must be printing to view the current alerts e Text only page View the HP LaserJet Toolbox as a site map that links to text only pages Other links This section contains links that connect you to the Internet You must have Internet access in order to use any of these links If you use a dial up connection and did not connect when you first opened the HP LaserJet Toolbox you must connect before you can visit these Web sites Connecting might require that you close the HP LaserJet Toolbox and reopen it e HP Instant Support e Product Registration Connects to the HP product registration Web site e Product Support Connects to the support site for the HP color LaserJet 2550 series printer Then you can search for help with a specific problem 48 Chapter 2 Installation and operation ENWW Maintenance Chapter contents ENWW A hadvas seas hcadtensac hededs pada ERSAAT 49 Life expectancies Of supplies oooocoocccccococcococcccconcnnnnonnno
37. by using the following directions for your operating system Uninstalling software for Windows The printer comes with an uninstall utility that you can use to select and remove any or all of the Windows HP printing system components from your computer To uninstall software for Windows 98 and later To uninstall the software from Windows 2000 or XP you must log on with administrator privileges 1 Close all of the open programs For Windows 98 and Me a Press Ctrl Alt Delete The Close Program dialog box opens b Select a program except Explorer or Systray and then click End Task c Repeat step b until all of the programs except Explorer and Systray are closed For Windows 2000 and XP a Press Ctrl Alt Delete The Windows Security dialog box opens b Click Task Manager and then click the Applications tab c Select a program and then click End Task d Repeat step c until all of the programs are closed 2 On the Start menu point to Programs point to Hewlett Packard point to HP color LaserJet 2550 series and then click Add or Remove On the Setup screen click Next 4 To remove specific software components click Modify the existing installation To remove all the printer software click Remove All Clicking Remove All requires you to have the software CD to complete the uninstallation 5 Click the drop down icon next to each feature that you want to remove From the drop down list click This feature will not be
38. cartridge If the print cartridge light is still blinking but the Attention light is not on turn the printer off and then back on If the problem persists repeat steps 1 and 2 with cyan print cartridges until the error is resolved If the problem persists replace the print cartridge E label reader which is located on the pressure assembly of the print cartridge carousel ENWW Table 6 3 Supplies Status light messages continued Control panel message Event Description log error message The print cartridge is empty or missing 40206 or the E label reader is faulty 10002 The printer cannot detect the print cartridge correctly The magenta print cartridge light is blinking and the printer stops printing The print cartridge is empty or missing 40205 or the E label reader is faulty 10003 The printer cannot detect the print cartridge correctly The yellow print cartridge light is blinking and the printer stops printing The print cartridges are empty or missing The printer cannot detect the print cartridges correctly The E label o reader might be faulty US The four print cartridge lights are blinking and the printer stops printing Recommended action Reinsert or replace the print cartridge If the print cartridge light is still blinking but the Attention light is not on turn the printer off and then back on If the problem persists repeat steps 1 and 2 with magen
39. control system coordinates all printer functions It drives the laser scanner system the image formation system and the pickup and feed system The engine control system contains the following components e Dc controller e High voltage power supply PCB e Low voltage power unit e Fuser control circuit e Low voltage power supply PCB 1 l 1 I 1 l 1 I 1 l Formatter l l K 1 l 1 l l l 1 l 1 l l Dc controller Power supply unit l l l l l l l l l l High voltage I lt 1 Image formation system power supply circuit l l l l l l l l l l l Figure 4 2 Engine control system includes the basic configuration of the printer Basic sequence of operation Operation sequences are controlled by the CPU in the dc controller in the engine control system Table 4 1 Basic sequence of operation describes engine operations for each period of a print operation Table 4 1 Basic sequence of operation eer Cdn WAIT wait From the time the power switch is turned on until transfer belt cleaning is complete STBY standby From the end of the WAIT or LSTR period until either a print command is sent from the formatter or the power is turned off 70 Chapter 4 Theory of operation Clears potential from the See Figure 4 3 Power on drum surface and cleans the sequence for a complete transfer belt description of the WAIT power on period Also see the Gen
40. creates an air bubble then the envelope might wrinkle during printing For more information see Resetting the printer for non HP supplies Envelope construction 20 Chapter 1 Product information ENWW CAUTION ENWW Envelope construction is critical Envelope fold lines can vary considerably not only between manufacturers but also within a box from the same manufacturer Successful printing on envelopes depends upon the quality of the envelopes When selecting envelopes consider the following components e Weight The weight of the envelope paper should not exceed 90 g m 24 Ib or jamming might occur e Construction Before printing envelopes should lie flat with less than 6 mm 0 25 inch curl and should not contain air e Condition Envelopes should not be wrinkled nicked or otherwise damaged e Temperature Use envelopes that are compatible with the heat and pressure of the printer The fusing temperature of this printer is 210 C 410 F e Size Use only envelopes that are within the following size ranges e Minimum 6 x 127 mm 3 x 5 inches e Maximum 216 x 356 mm 8 5 x 14 inches Envelopes with double side seams Double side seam construction has vertical seams at both ends of the envelope rather than diagonal seams This style might be more likely to wrinkle Be sure the seam extends all the way to the corner of the envelope as shown in the illustration 1 acceptable 2 unacceptable Envelopes with adh
41. flat flexible cable from the cable socket callout 2 on the laser scanner 4 Rotate the lower part of the top output bin cover callout 3 toward the front of the printer and then lift away from the printer 5 Remove four screws callout 4 6 Unroute the cables from the cable harness attached to the back of the laser scanner 128 Chapter 5 Removal and replacement ENWW 7 Lift the laser scanner assembly straight up to remove it from the printer Removing the laser scanner assembly Reinstallation tip When replacing the top output bin cover callout 3 in place the guides on the top output bin roller on top of the cover as shown in Reinstalling the top output bin cover ENWW Removal and replacement 129 Front cover 1 Remove the following covers e Right and left side covers see Right and left side covers 2 Use a flatblade screwdriver to release two internal tabs callout 1 one at each side of the printer 3 Rotate the cover upward to release four internal tabs callout 2 underneath the cover Figure 5 27 Removing the front cover Reinstallation tip Make sure that the tabs on each side of the cover click into place Density sensor and top of page sensor 1 Remove the following covers e Right and left side covers see Right and left side covers e Front cover see Front cover 130 Chapter 5 Removal and replacement ENWW 2 Press the tab call
42. from the back of the printer 2 Open tray 1 52 Chapter 3 Maintenance ENWW 4 Grasp both sides of the center tab and pull the cover out of the printer gt EN O E 5 Squeeze the tab on the idler roller that is located on the right side of the pickup roller If the tab is not visible rotate the idler roller so that the tab is toward the front of the printer 7 Squeeze the tab on the idler roller that is located on the left side of the pickup roller If the tab is not visible rotate the idler roller so that the tab is toward the front of the printer ENWW User replaceable parts 53 8 Slide the idler roller to the left to separate it from the pickup roller 9 Press and hold the button that is located on the right side of the pickup roller Slide the pickup roller slightly to the right and then pull it off of the shaft Se E Vy SS aa CAUTION To prevent the shaft retaining pin from falling out do not move the remaining hub that is located to the left of the pickup roller 10 Locate the separation pad beneath the area of the shaft from which the pickup roller was removed 54 Chapter 3 Maintenance ENWW Note Note ENWW 11 Insert a flatblade screwdriver into the slot under the separation pad Pry the pad up from the spring loaded base by twisting the screwdriver until the tabs are separated from
43. grounding wire that must be hooked around the printer chassis upon reinstallation of the gear assembly Callout 3 shows the grounding spring Figure 5 37 Removing the waste toner sensor Rotary drive assembly Note The rotary drive assembly includes the developer motor the brake solenoid and the encoder motor 1 Remove the following covers and assembly e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Back cover see Back cover e Top cover see Top cover ENWW Removal and replacement 139 2 Unplug three cable connectors callout 1 from the dc controller and unplug the flat laser scanner cable callout 2 from the laser scanner Figure 5 38 Removing the rotary drive assembly 1 of 3 3 Remove one screw callout 3 from the motor 140 Chapter 5 Removal and replacement ENWW 4 Remove one of the four screws that secures the rotary drive assembly to the chassis callout 4 Figure 5 39 Removing the rotary drive assembly 2 of 3 5 Face the top of the printer and remove the other three screws that secure the rotary drive assembly to the chassis callout 5 ENWW Removal and replacement 141 Lift the rotary drive assembly straight up to remove it from the printer ATTENTION VORSICHT ATTENZIONE LL PRECAUCION E 20 a Figure 5 40 Removing the rotary drive assembly 3 of
44. i 500 sheet feeder paper sensor pick up motor ala alae 8633 azz t pick up solenoid PS719 i le a lor 2155 By 2 SL95 ui rm E S gee a i ALY cola i J719 olal Yiz d GE J706 ing ZME i ajo i STI i A 2 i PS712 i ale ale i ESTAS Developing rota i ay Zza al Le i Roller engaging ping Y olf Zl c 20 lt I engaging sensor ale aa yal sensor wo oa ryt UI 1 i e f J2403 J2404 SS ue Ee bk J702 E n 500 sheet feeder PCA X Roller engaging ROS A 1 i Se i po AO clutch DCN702 500 sheet feeder PCA optional em pla Door open Lee Fuser motor detection switch A ge Casa 6Pin i 250 sheet paper feeder Option paper eae i 250 sheet paper feeder paper sensor feed sensor i ITB home position Waste toner t pick up solenoid PS716 PS717 J222DA 6Pin detection PCA b 2 Z i sensor Uk melt mX i SEIA ZEIL ajo hoko 1 Ed 1 i a oi A go SS Ss i Se age alge Fiol gie ojo d oj oal olaj b Density In i DO O detection Main motor i J2304 J2305 303 4 i Test print switch PCA DCM701 250 sheet feeder PCA SWA J81 b J2308 42307 x YX p2302 oe b alo 0 on o 1 Jaleo jo o elle i Jm 3701 H 0 nio oa 01m xt 09 CN ajo o i J230L J222D R H Aa x H J230LB i A 8Pin 6Pin i A feeder optional i gt Jeans i e A _ J230DB Front fixing Developing rotary Registration 8Pin 6Pin paper i 230DA stopper solenoid clutch J230DA detection sensor sL93 cu PS720 HA Rm ono a m won o AUS
45. laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e The paper guides is dirty or debris is in the print path Open the HP LaserJet Toolbox to use the cleaning page See To use a cleaning page for details e The imaging drum might be low or empty Check the status of the imaging drum at the printer control panel or in the HP LaserJet Toolbox and replace the imaging drum if it is low or empty e The fuser might not be heating correctly If the printer is plugged into a surge protector plug it directly into the wall e Ifthe problem is not resolved see lf the problem is not resolved 194 Chapter 6 Troubleshooting ENWW ENWW Loose toner Toner smears easily when touched AaBe amp c e Inthe printer driver select the Paper tab and set Type is to match the type of paper on which you are printing Print speed might be slower if you are using heavy paper e Check the paper type and quality Use a different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e Clean the inside of the printer Open the HP LaserJet Toolbox to use the cleaning page See To use a cleaning page for details e The fuser or imaging drum might be damaged e lf the problem is not resolved see lf the problem is not resolved Repetitive defects
46. narran nan r rana narran 182 Attention light messages unpumbered 184 Attention light messages pnumbered arc cnn 185 Accessory error light messages 186 Service error light messages 186 Additional error messages 189 Solving general printing problems oooonccccnnnnccnnnnocccnnnonnncnanoncnc nano ncrrnnarcnnrnnnn 207 Problems in the CHOOSE ioina aren EEE nc cnn nana TaT EEEE 213 Printing EOS a a Acc 214 USB Probl MS cimil 215 Repetitive image detechs ocn nr nn nn rca r nan n rra 227 Technical support Web sites oooooococccccccccciccccccconoononnncncnoncnonn nana nnr nn nnnnnnnnnn 238 ee nas 239 COVERS tirita til dei AR 245 Front trame aSSOmpbly EE 247 Internal components 1 Of 21 251 Internal components 2 Of 21 253 Main drive assembly cccorriscr ataco ica d s 255 Rear frame assembly nereiidi learned ERa candado naci 257 Middle frame assembly wis 2 ee ee eddie denned 259 Rotany assembly since na eh re nae Noa ae 263 Power supply base assembly coocooccccnnnocccccnonnonccccnnnoncncnnn nn roca nr nc 265 Rotary drive assembly osise ioar tarse dnd 267 PEA assemblies ii A catia 269 Alphabetical parts jet 270 Klee El TTT 278 ix ENWW ENWW List of figures Figure 1 1 Figure 2 1 Figure 2 2 Figure 2 3 Figure 3 1 Figure 3 2 Figure 3 3 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 4 12 Figure 4 13 Figure
47. occur select this option in the PS printer driver or the HP LaserJet Toolbox The job prints in Courier the printer default typeface instead of the typeface you requested The requested typeface is not downloaded A personality switch might have been performed to print a PCL job just before the PS printing job was received A PS error page prints The print job might not be a PS job 212 Chapter 6 Troubleshooting Download the font you want to use and send the print job again Verify the type and location of the font Download the font to the printer if applicable See the software documentation Make sure the print job is a PS job Check to see whether the program expected a setup or PS header file to be sent to the printer ENWW VM Error This is a PS font error that occurs when you are e Select Unlimited Downloadable Fonts in using several fonts the printer driver Range Check The tray settings are incorrect Try printing from a different tray Select Unlimited Downloadable Fonts in the printer driver Limit Check The printer is out of memory Reduce the complexity of the page Use one of the other printer drivers Send the print job in smaller pieces with a fewer number of pages Install more memory Solving common Macintosh problems In addition to the problems listed in Solving general printing problems this section lists problems that can happen only when using the Mac OS versions
48. of printer errors The most recent error is at the top of the list e Save Restore Settings Save the current settings for the printer to a file on your computer Use this file to load the same settings onto another printer or to restore these settings to this printer at a later time e Device Configuration View a detailed description of the printer s current configuration including the amount of memory installed and whether optional trays are installed Settings tab The Settings tab has links to several pages where you can view and change the printer s configuration Software settings can override settings that are made in the HP LaserJet Toolbox e Device Information View basic information about the printer e Paper Handling View and change the settings for the printer s trays e Printing View and change the default printer job settings e PCL View and change the PCL font information e PostScript View and change settings for PS errors and timeout e Print Quality View and change the print quality settings e Print Modes View and change the print modes for various media types e System Setup View and change system information e UO View and change the I O timeout setting e Service Gain access to various procedures required to service the printer Network window The network administrator can use the Network window to control the network related settings for the printer when it is connected to an IP based network This
49. pan 1 Remove the following covers and assemblies e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Optional tray 2 see Optional tray 2 250 sheet tray e Toner catch tray see Toner catch tray 2 Unplug five cable connectors callout 1 from the dc controller 154 Chapter 5 Removal and replacement ENWW 3 Remove one screw callout 2 from the grounding wire Figure 5 54 Removing the ECU pan 1 of 2 4 Turn the printer over so that it rests on its top 5 Remove one screw from the left side of the printer callout 3 6 Remove eight screws callout 4 from the bottom of the ECU pan ENWW Removal and replacement 155 7 Lift the ECU pan off of the printer Figure 5 55 Removing the ECU pan 2 of 2 Reinstallation tip Make sure that the grounding springs are attached to each of the eight ECU connections before reinstalling the ECU pan Figure 5 56 ECU connections 156 Chapter 5 Removal and replacement ENWW Sub high voltage transformer PCA 1 Remove the following covers and assemblies e Right and left side covers see Right and left side covers e Optional tray 2 see Optional tray 2 250 sheet tray e Fuser see Fuser cover and fuser e ECU pan 2 Unplug one connector callout 1 from the high voltage transformer PCA Remove two screws callout 2 4 Lift up the
50. paper trays It signals the driver PCB in optional tray 2 250 sheet paper tray and in optional tray 3 500 sheet paper tray In optional tray 2 the printer main motor drives the tray solenoids In optional tray 3 each driver PCB controls the motors and solenoids in its paper tray The following components are identified in Figure 4 7 Optional tray 2 250 sheet paper tray e DCM701 gear train motor printer e SL9 pickup solenoid optional tray 2 76 Chapter 4 Theory of operation ENWW Note Figure 4 7 ENWW e PS716 paper sensor optional tray 2 e PS717 paper feed sensor Only optional tray 2 is shown optional tray 3 is similar Tray 2 250 sheet paper tray PCB gt Lei PICKUP SOLENOID DRIVE signal OP1SLD GEAR TRAIN MOTOR CONTROL signal PAPER DETECTION signal OP1PAS PAPER FEED DETECTION signal OP1RTRYS Feed roller Pickup roller Separation pad Optional tray 2 250 sheet paper tray Jam detection The registration sensor PS711 and the fuser sensor PS1 detect media that is moving through the printer If a jam is detected the dc controller immediately stops the printing process and sends a message to the video controller circuit A jam can be detected under any of the following conditions e Pickup delay jam The leading edge of the print media does not reach the registration sensor PS711 within 1 1 seconds tray 1 1 7 seconds optional
51. protrude from the back of the printer Loading optional tray 3 The optional tray 3 supports A4 and letter size paper Optional tray 3 supports only paper which includes average weight letterhead and prepunched paper For additional information about letterhead and prepunched paper see the Series Printer User CAUTION Print special print media such as labels and transparencies from tray 1 only Printing special print media from optional tray 2 or optional tray 3 can cause jams To load optional tray 3 1 Pull the tray out of the printer and remove any paper 42 Chapter 2 Installation and operation ENWW 3 For letter size paper move the side width guides outward as far as possible For A4 size paper move the side width guides inward as far as possible 4 Load the paper If this is special paper such as letterhead load it with the side to be printed facing down and the top edge toward the front of the tray Note If you are manually duplexing see the HP Color LaserJet 2550 Series Printer Series Printer User for loading instructions 5 Make sure that the stack of paper is flat in the tray at all four corners and keep it below the height tabs on the length guide in the rear of the tray ENWW Loading media 43 HP LaserJet Toolbox The HP LaserJet Toolbox is a Web application that you can use for the following tasks e Check the printer status e Configure the printer settings e View troubleshooting info
52. release the left swing shaft bushing and then rotate the bushing to a vertical position r Figure 5 46 Removing the print cartridge carousel 2 of 3 4 On the right side of the printer repeat step 3 on the right swing shaft bushing Examine the positions of the left pressure shaft holder callout 3 the right pressure shaft holder callout 4 and the pressure shaft gear callout 5 before you perform step 5 The pressure shaft holders must be reinstalled to their correct positions when reinstalling the print cartridge carousel ENWW Removal and replacement 147 5 Use the flatblade screwdriver to pry two white tabs on the pressure shaft holders from their seated positions in the rear frame assembly Figure 5 47 Removing the print cartridge carousel 3 of 3 6 Lift the print cartridge carousel out of the printer Reinstallation tip Make sure that the feet of the pressure shaft holders fit into the slots in the rear frame assembly After the feet are reinstalled correctly press the tops of the white tabs firmly into position 148 Chapter 5 Removal and replacement ENWW Incorrect reinstallation of the feet is shown followed by correct installation Also make sure that the tab on the pressure shaft gear points down Aligning the carousel gears Make sure that the gears in the print cartridge carousel are aligned correctly before placing the carousel back into the printer 1 Rotate the carousel so
53. roller charging transfer belt cleaning roller The transfer belt cleaning roller to which a dc positive bias is applied imparts a positive charge to the residual toner on the transfer belt This positive charge is stronger than the positive charge applied in step 8 so the earlier charge now behaves like a negative charge Transfer belt Transfer belt cleaning roller Charged residual toner Ac bias oa Dc bias 777 Figure 4 25 Step 9 roller charging transfer belt cleaning roller ENWW Image formation system 91 Step 11 transfer belt cleaning A dc positive bias is applied to the transfer belt to produce a difference in potential between the belt and the photosensitive drum This causes residual toner to transfer to the drum Image cartridge D e Waste toner O Z transport plate y O m NN wie Waste toner case De bias negative Photosensitive _ drum 7777 Stirrer Transfer belt Dc bias positive Figure 4 26 Step 10 transfer belt cleaning 92 Chapter 4 Theory of operation ENWW Figure 4 27 ENWW Step 12 drum cleaning The cleaning blade scrapes the residual toner off of the photosensitive drum where the waste toner screws collect the toner and deposit it into the waste toner case Image cartridge Screw Cleaning blade Waste toner transport plate e Screw Photosensitive drum Transfer belt
54. see Interface cover e Formatter cage see Formatter cage 2 Remove five screws callout 1 from the metal plate on the back of the formatter cage and then remove the metal plate ENWW Removal and replacement 113 3 Lift the front edge callout 2 of the plate upward to clear the tabs callout 3 two of five shown in the callout and then lift the plate away from the formatter cage Removing the formatter 1 of 2 114 Chapter 5 Removal and replacement ENWW 4 Unplug one connector callout 4 and then lift the formatter from the formatter cage Figure 5 11 Removing the formatter 2 of 2 Reinstallation tip Make sure that the metal clips on the interface connector are in the open position perpendicular to the connector If they are in the closed position when the formatter is reinstalled they do not fit correctly through the hole in the formatter cage ENWW Removal and replacement 115 5 To remove the network card remove two screws callout 5 and then lift the network card from the formatter cage Figure 5 12 Removing the network card Fuser motor 1 Remove the following covers and assembly e Right side cover see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies 2 Unplug one connector callout 1 3 Remove four screws callout 2 116 Chapter 5 Removal and replacement ENWW 4 Pull the motor away from the printer
55. settings by using the HP LaserJet Toolbox Environmental differences aging print cartridges aging toner and an aging imaging drum might cause fluctuations in image density The printer accounts for this with image stabilization control The printer automatically calibrates at various times to maintain the highest level of print quality You can also request a calibration by using the HP LaserJet Toolbox The printer does not interrupt a print job to calibrate It waits until the job is complete before calibrating or cleaning While the printer is calibrating it pauses printing for the time that is required to complete the calibration To calibrate the printer at the printer C Press o Go and Rotate CAROUSEL simultaneously to start a calibration To calibrate the printer from the HP LaserJet Toolbox This procedure applies to Windows operating systems only Macintosh users should calibrate the printer manually by using the previous procedure 1 Open the HP LaserJet Toolbox in one of these ways e On the desktop double click the HP LaserJet Toolbox icon e On the Start menu point to Programs point to HP Color LaserJet 2550 and then click HP LaserJet Toolbox 2 On the Troubleshooting tab click Print Quality on the left side of the screen Click Calibrate Now Calibrating the printer 63 Managing supplies NoteNote Note For warranty information about these supplies see Limited warranty for the print cartridg
56. slip the top door arms through the holes in the top cover Figure 5 22 Removing the top door 1 of 2 Reinstallation tip Slide the door arm on one side through the hole in the top cover and into place before attempting to reattach the other side 126 Chapter 5 Removal and replacement ENWW 5 Slide the top door rack callout 3 off of its pin at the right side of the cover es 7 q y lt a Figure 5 23 Removing the top door 2 of 2 Air duct and fan 1 Remove the following covers e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Back cover see Back cover e Top cover see Top cover 2 Remove one connector callout 1 3 Release two tabs callout 2 ENWW Removal and replacement 127 4 Lift the air duct straight up to release two hidden tabs at the top of the air duct and lift the air duct away from the printer Figure 5 24 Removing the air duct 5 Toremove the fan callout 3 from the air duct release two tabs on the side of the air duct that faces the printer and then lift the fan from the air duct Laser scanner assembly 1 Remove the following covers e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Back cover see Back cover e Top cover see Top cover 2 Unplug two cable connectors callout 1 and unroute the cables from the cable holders 3 Disconnect the
57. tere entree eee ee nn conan nn RRRA NNNNA NERA 13 DPECINCALONS EE 15 Media Specifications el Supported media weights and sizes cceccececceceeeeeeenee cece cece seeeecaeeeeeeseeseneecaeeeeeeeeeeeees 17 General guidelines 0 0 cece cece eee ceeeeeeeteneeee scenes eeeceeeeeeceeeeeseneaeeeseaaaeeseeeaeeeteeaaeeseeaaaees 18 Paper and print media omisiones da 19 Printing and storage environment cceeeeeete eerste eter teen eee ee anno conc canon cc ncnn nan nnccn nana nccnnnnns 19 ENVO ODES ET 20 Re 21 TFANSPANEN CIOS EE 22 Hewlett Packard limited warranty Statement ccccceeeeceeeeeeeeenee eee eeeenneeeeeeeeeaeeeeeeenaeeeeeeenaas 23 Limited warranty for the print cartridges and imaging drum 0oooccoinnoccccccnnnccccnnnnccnanannnnn cnn 24 Print cartridge information 0 cece tere eee eee teeter nc cnn anar n nn nc n nan n nn cnn nan ANENE AANE 25 Refilled print cartridges cion as 25 HP LaserJet printing supplies oooooooccnccononocoooccccccnoconononcnnnnnnnnnnnnnnonccnnnnnnnnnnn cnn nn nn nnannnnnnno 25 HP Printing Supplies Returns and Recycling Program miormatton 25 Regulatory statements 2 0 0 0 cece erect eee ere ee eerie nr erent rc ran rr rr r nn rn ren r rr Aaaa 27 Safely Statements TEE 28 Laser safety statement cccccinnncccccnnnocccccnnoncncnononcnnnnn conc cnn nan n cnn rca nn nn cnn naar acc rr naar nnncnnnnnnccninns 28 Canadian DOC E EE 28 Korean EMI statement cccccceceeeeeeeeenceece
58. the printer 12 Use one hand to push the spring loaded base down and then use the other hand to pull the separation pad up and out of the printer If you feel resistance when you try to remove the pad make sure that the tabs are completely separated from the printer 13 Push the spring loaded base down and position the new separation pad in the empty slot J Make sure that the two tabs on the edge of the pad are toward the front of the printer User replaceable parts 55 14 Snap both sides of the separation pad firmly into place until they click _F wm CAUTION If the pad is not straight or if space exists between the pad and the base make sure that the tabs on the pad are toward the front of the printer 15 Hold down the new separation pad Position the new pickup roller so that the button is on the right side and the open side of the roller faces down Make sure that the small ridge on the open side of the roller aligns with the groove in the shaft 16 Slide the left and right idler rollers inward against the pickup roller until the idler rollers click into place 56 Chapter 3 Maintenance ENWW 17 Hold the faceplate cover as shown in the illustration and align the cover with the rails on the inside of the printer 18 Grasp both sides of the center tab and insert the cover into the printer until the cover clicks into place Close tray 1
59. the printer when the rear output door is open Use the rear output door straight through paper path when printing envelopes labels heavy or lightweight paper and other thick or special print media Remove each sheet as it exits the printer Printer output paths Chapter 2 Installation and operation ENWW Loading media CAUTION ENWW Load special print media such as envelopes labels custom size media and transparencies in tray 1 only Load only paper in optional tray 2 or optional tray 3 Loading tray 1 Tray 1 multipurpose tray holds up to 125 sheets of paper or other print media or up to 10 envelopes To load tray 1 Avoid adding print media to tray 1 while the printer is printing or jams can occur 1 Open tray 1 2 Slide out the tray extender If the print media being loaded is longer than 229 mm 9 inches also open the additional tray extender Loading media 39 4 Place print media into the tray with the side to be printed up and the top short edge in first Note If you are manually duplexing see the HP Color LaserJet 2550 Series Printer User Guide for loading instructions 5 Slide the paper width guides inward until they lightly touch the print media stack on both sides without bending it Make sure that the print media fits under the tabs on the width guides CAUTION If you choose to close tray 1 first wait for the printer to finish printing Closing the
60. tip The hidden screw in callout 7 secures a grounding plate callout 8 to the chassis Removing the screw releases the grounding plate Upon reinstallation of the top plate make sure that the grounding plate tab is in its correct position on the outside of the carousel drive shaft Reinstalling the grounding plate 144 Chapter 5 Removal and replacement ENWW 10 Remove four screws callout 9 from the top plate Figure 5 44 Removing the top plate 3 of 3 11 Carefully lift the top plate off of the printer frame Print cartridge carousel 1 Remove the following covers and assemblies e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Back cover see Back cover e Top cover see Top cover e Air duct see Air duct and fan e Rotary drive assembly see Rotary drive assembly e Top plate see Top plate ENWW Removal and replacement 145 2 Remove two screws callout 1 from the back of the printer Figure 5 45 Removing the print cartridge carousel 1 of 3 Reinstallation tip Because the remainder of the print cartridge carousel removal procedures are performed from the left right and front of the printer it is easy to forget to replace the two screws at the back of the printer 146 Chapter 5 Removal and replacement ENWW 3 Press the white plastic tab callout 2 at the left side of the printer to
61. to ensure optimum printer performance The required condition is 20 to 24 C 68 to 75 F with a relative humidity of 45 to 55 The following guidelines should be helpful when evaluating the storage environment e Print media should be stored at or near room temperature e The air should not be too dry or too humid to moderate the hygroscopic properties of paper e The best way to store an opened ream of paper is to rewrap it tightly in its moisture proof wrapping If the printer environment is subject to extremes unwrap only the amount of paper to be used to prevent unwanted moisture changes e Avoid storing paper and print media near heating and air conditioning vents or near windows and doors that are frequently open Envelopes Use only tray 1 to print on envelopes Select the type of envelope that you are using from the Print dialog box or the printer driver In your program set the margins for the envelope The following table gives typical address margins for a commercial 10 or DL envelope Return address 15 mm 0 6 inch 15 mm 0 6 inch Delivery address 51 mm 2 inches 89 mm 3 5 inches e For the best print quality position margins no closer than 15 mm 0 6 inch from the edges of the envelope e Avoid printing over the area where the envelope seams meet Envelope storage Proper storage of envelopes helps contribute to print quality Envelopes should be stored flat If air is trapped in an envelope and
62. to recover from the error and print whatever data it can If successful the printer completes the job while the Ready light blinks Ifunsuccessful the Attention with Ability to Continue message continues to appear Press Cancel Job to cancel the print job If the problem has been resolved the printer returns to the Ready state Ready light on ENWW Table 6 6 Attention light messages numbered Control panel message Event Description log error message 30016 memory out The Attention light is blinking and the Go light is on The printer stops printing 30033 unexpected size 35031 invalid personality 50012 beam detect malfunction ENWW Recommended action Make sure that the formatter cable is connected Press Ka Go to resume printing If you lose some data try to free some printer memory by removing fonts macros or any data currently in printer memory If you continue to lose data you might have to add more printer memory For a temporary solution simplify the image Load the correct size of media and then press Go If printing does not resume open the top cover remove the imaging drum and check for a jam inside the printer Turn the printer off and then back on The print job was canceled either because the printer language personality is not supported or because the carousel is not positioned correctly 1 Make sure that the carousel is positioned cor
63. tray 2 or 2 8 seconds optional tray 3 e Pickup stationary jam The registration clutch is on and the registration sensor PS711 does not detect the trailing edge of the media within 3 4 seconds after the start of a re pickup operation e Fuser wrap jam The main CPU detects media inside the fuser front sensor PS720 when the power is turned on or after the top cover is closed Pickup and feed system 77 e Delivery delay jam The registration clutch is on and the fuser delivery sensor PS1 does not detect the leading edge of the media within 2 3 seconds after the start of a re pickup operation e Delivery stationary jam The leading edge of media does not pass the fuser delivery sensor PS1 within 2 4 seconds after it has passed the registration sensor PS711 e Door open jam The main CPU detects that the top cover is open during a print operation e Residual jam The main CPU detects one or more of the following conditions e Power is turned on e The printer door is closed after a jam occurrence e The registration sensor PS711 and fusing delivery sensor PS1 detect media e Paper pickup failure The sensor PS717 near the feed roller does not detect media moving through the printer Photosensors and switches Figure 4 8 Photosensors and switches 1 of 2 78 Chapter 4 Theory of operation ENWW Figure 4 9 ENWW Photosensors and switches 2 of 2 Table 4 3 Photosensors and switches Front fu
64. until you are ready to use it To prevent damage do not expose the print cartridge or imaging drum to light for more than a few minutes e See Table 1 5 Environmental specifications for operating and storage temperature ranges e Store the supply in a horizontal position e Store the supply in a dark dry location away from heat and magnetic sources Replacing and recycling supplies To install a new HP print cartridge or imaging drum follow the instructions included in the box that contains the new supply or see the HP Color LaserJet 2550 Series Getting Started Guide Managing supplies 65 CAUTION To recycle supplies place the used supply in the box in which the new supply arrived Use the enclosed return label to send the used supply to HP for recycling For complete information see the recycling guide that is included with each new HP supply item See HP Printing Supplies Returns and Recycling Program information for more information about HP s recycling program HP policy for non HP supplies Hewlett Packard Company cannot recommend the use of non HP supplies either new or remanufactured Because they are not HP products HP cannot influence their design or control their quality Service or repairs that are required as a result of using a non HP supply will not be covered under the printer warranty When you insert a supply into the printer the printer informs you if the supply is not a genuine HP supply If y
65. 00 With FCG Standards Le IDAHO 83714 LISTED FOR HOME OR OFFICE USE invent 100 127 Y AC C EO Us GE This product conforms with Num ro du produit 50 60 Hz 5 7A 5 7A CDRH radiation performance Product No Q3702A Fabriqu le a A 277 Complas wih Casi Num ro de S rie NOM 1 K l EMC Class B requirements NYCE Serial No CNBD123406 Se EN Bades UNO compatible sletromagn tiques Product of China lt lt CEM gt gt Produit de Chine SITE MX2 gt PET lt Figure 1 1 HP color LaserJet 2550 series printer identification label 8 Chapter 1 Product information ENWW Software components Software and supported operating systems For easy printer setup and access to the full range of printer features HP strongly recommends that you install the software that is provided Not all software is available in all languages See the HP Color LaserJet 2550 Series Printer Getting Started Guide for installation instructions and see the Readme file for the latest software information The most recent drivers additional drivers and other software are available from the Internet and other sources See Related documentation and software The printer supports the following operating systems e Microsoft Windows 98 Windows 2000 Windows Millennium Edition Me and Windows XP e Windows NT 4 0 driver only other printer software is not available e Macintosh OS 9 1 9 2 9 3 and OS X v 10 1 and later e UNIX Linux an
66. 1 67901 Extended life cartridge EE Q3961 67902 EMEA Print cartridge yellow user Q3972 67901 SE ESES Q3972 67902 EMEA Print cartridge yellow user Q3962 67901 Extended life cartridge EES Q3962 67902 EMEA Print cartridge magenta Q3973 67901 user replaceable 3973 67902 EMEA Print cartridge magenta Q3963 67901 Extended life cartridge user replaceable 3963 67902 EMEA Imaging drum Q3964 67901 20 000 black only The average life is 6 000 to 5 000 color 8 000 pages Transfer roller RF5 4067 000CN Can affect print quality and paper movement Printer pickup roller RB3 0160 000CN Look for glazing and or cracks Printer separation pad RF5 4012 000CN Can affect document movement Fuser assembly 110 127 V RG5 7572 000CN Can affect print quality and document movement Fuser assembly 220 240 V RG5 7573 000CN Can affect print quality and document movement Separation pad optional RB2 9960 000CN Can affect document trays 2 and 3 movement The estimated print cartridge life is based on letter or A4 sized paper with an average of 5 toner coverage and a medium density setting Print cartridge life can be extended further by conserving toner by using draft mode settings ENWW Life expectancies of supplies 51 User replaceable parts Pickup rollers and separation pads are user replaceable parts Replacing the tray 1 pickup roller and separation pad 1 Turn the printer off and disconnect the power cable
67. 148 Reinstalling the print cartridge carousel oooonnccccnnnnnocccccnnnnannnccccnnnannnncccnnnnnn 150 Removing the registration roller assembly 0oooooooonnnncccnnnnnnnaccccccnnnnancccnnnnnnnna 151 Removing the toner Catch tray o oooococcnnncccccnonncccccnnnnnnno nana nonano cnn arrancan 151 Removing the transfer roller plate o ooooonnnccnnnnicnnnna cacon nccccnnnarccn narran 152 Removing the transfer roller oococooonnccccnnnnaccccconnannccccnn ano ncn cnn nan nc nc nana ncnnnnnna 153 Removing the feed drive Shaft oooooonnncccnnnnncccccnnancccconanccccnnnnrrn cnn nor cnn 154 Removing the ECU pan 1 Of ii 155 Removing the ECU pan 2 Of ii 156 EGU COMECION Si a 156 Removing the sub high voltage transformer PCA occcccccnnococccccnnnnnancncnnnnnna 157 Removing the high voltage transformer PCA occcccccnnncccccccononancncnnnanancncninnnns 158 Removing the low voltage PCA 1 Of 2 159 Removing the low voltage PCA 2 Of 2 160 Removing the paper tOp Sensor 0 ecceceececeeeeeeeeeeeaeceeeeeeesecnaeeeeeeeeeeensneeees 161 Removing the fuser Wrap SENSOT occoococcccccnoconccccnnnncnncnononcnnnnnnnnnccnnnnnnncncnnnns 162 Removing the 250 sheet feeder pickup roller ccceceeeseesecteeeeeeeeees 163 Removing the 500 sheet feeder pickup roller 1 Of 21 164 Removing the 500 sheet feeder pickup roller 2 Of 21 165 ENWW ENWW Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure
68. 26 000CN Table 7 11 on page 265 270 Chapter 7 Parts and diagrams ENWW SE AA SR Table 7 14 Alphabetical parts list continued Cable transfer sensor 2nd Table 7 7 on page 255 Cable upper Table 7 5 on page 251 Cable waste toner sensor Table 7 4 on page 247 Carousel lock left white RB2 9809 000CN Table 7 10 on page Carousel lock right black RB9 0879 000CN Table 7 10 on page 263 Cartridge guide assembly Table 7 6 on page 253 Clamp cable Table 7 4 on page 247 Clamp cable Table 7 9 on page 260 Clip cable Table 7 4 on page 247 Clip cable Table 7 9 on page 260 Clip cable WT2 5737 000CN Table 7 11 on page 265 Clutch CL1 RH7 5366 000CN Table 7 5 on page 251 Clutch main gear train CL2 RH7 5335 000CN Table 7 7 on page 255 Connector optional trays RH2 5519 000CN Table 7 9 on page 259 Contact assembly E label reader RG5 6957 000CN Table 7 10 on page 263 Control panel assembly Table 7 3 on page 245 Cover fuser motor Table 7 8 on page 257 Cover gear Table 7 9 on page 259 Cover interface Table 7 3 on page 245 Cover left Table 7 3 on page 245 Cover left side assembly Table 7 3 on page 245 Cover rack Table 7 3 on page 245 Cover rear Table 7 3 on page 245 Cover right side assembly Table 7 3 on page 245 Cover solenoid SL92 Table 7 4 on page 247 Cover top assembly RG5 7567 000CN Table 7 3 on page 245 Cover top output bin RB9 0881 000CN Table 7 3 on page 245 Damper RB2 6248 000CN Table 7 4 o
69. 3 versions supported 9 wire harnesses replacing 99 wiring diagrams 234 wrap jam sensor PS720 75 wrinkled pages troubleshooting 198 Index 293 Y Yellow print cartridge light blinking 179 181 locating 34 on 177 294 Index ENWW LJ invent 2004 Copyright Hewlett Packard Development Company LP www hp com 70 Q3702 90923
70. 3973 67902 EMEA Q3963 67901 Q3963 67902 EMEA Q3971 67901 Q3971 67902 EMEA Q3961 67901 Q3961 67902 EMEA Imaging drum Imaging drum Q3964A Q3964 67901 n a Trays and tray accessories Optional 250 1 optional 250 Q3709A Q3709 67901 n a sheet tray sheet tray Optional 500 1 optional 500 Q3710A Q3710 67901 n a sheet tray sheet tray C9706 67901 C9706 67901 n a pad ENWW Tray 1 kit Tray 1 kit with extra separation pads 1 pickup roller and 1 separation 1 pickup roller and 3 separation C9706 67902 C9706 67902 n a pads Accessories 239 Table 7 2 Accessories continued Product name Description Product number Part number Exchange number Memory SDRAM DIMM 128 MB SDRAM C9121A C9121A n a DIMM SDRAM DIMM 64 MB SDRAM Q1887A Q1887A DIMM Cables Parallel cable Parallel cable IEEE 1284 cable a b 2 meter IEEE 1284 cable a b 3 meter External print servers SDRAM DIMM 32 MB SDRAM C7845A C7845A DIMM USB cable USB cable a b C6518A C6518A n a 2 meter External print server External print server External print server External print server External print server External print server 240 Chapter 7 Parts and diagrams HP Jetdirect 170x Ethernet parallel connection HP Jetdirect 175x Ethernet Fast Ethernet USB connection HP Jetdirect 300x Ethernet Fast Ethernet parallel connection HP Jetdirect 500x Ethernet Fast Ethernet parall
71. 4 14 Figure 4 15 Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 4 20 Figure 4 21 Figure 4 22 Figure 4 23 Figure 4 24 Figure 4 25 Figure 4 26 Figure 4 27 Figure 4 28 Figure 4 29 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 HP color LaserJet 2550 series printer identification Label 8 ee TOQUINGG EE 32 Standard and optional input trays HP color LaserJet 2550 series Printers sec coi i ni O 37 Printer output pat S rias iia ladra 38 MEA A aid 61 Toner Specks imita a ent 61 Loading the cleaning page in tray 1 cccconnnncccnnnnaccccnnnoncccnanannnccnanoncncnn nan nnncnnns 62 Cross section of the printer ooooocooocccccccccocooconcnnononcnnnononnnnnnnnoncnnncnnnnnnnnnnnannannod 68 Engine control system includes the basic configuration of the printer 70 POWEr ON SEQUENCE arser neiaie eet aena ae i a Taa aiaa ea ia 72 Motors and Jang ts usin id ne ad pe a ee 73 Laser SCanner System coito dr dape daran ger 74 Pickup and feed system ooocnccccninnocccccnonnoncnnnnn ono conc nn aeiio rra 76 Optional tray 2 250 sheet paper tray ooooonnnocccnnnnccccnnnoncccccnnoncccnnnannnccnnnnncncnnna 77 Photosensors and switches 1 Of 2 78 Photosensors and switches 2 Of 2 79 Sl EE 80 EES Seege ua AE e 81 Printed circuit assemblies 1 Of 2 82 Printed circuit assemblies 2 Of 2 83 Image formation System biocide nedin deed ited dd neni
72. 83 Table 7 15 Numerical parts list continued Part number Table and page VT2 0012 005CN Table 7 11 on page 265 WG8 5382 000CN Table 7 4 on page 247 WG8 5382 000CN Table 7 9 on page 260 WT2 5056 000CN Table 7 4 on page 247 WT2 5700 000CN Table 7 4 on page 247 WT2 5700 000CN Table 7 9 on page 260 WT2 5737 000CN Table 7 9 on page 260 WT2 5737 000CN Table 7 11 on page 265 XA9 0849 000CN Table 7 5 on page 251 XA9 0849 000CN Table 7 6 on page 253 XA9 0849 000CN Table 7 8 on page 257 XA9 0890 000CN Table 7 9 on page 260 XA9 1262 000CN Table 7 4 on page 247 XA9 1262 000CN Table 7 5 on page 251 XA9 1262 000CN Table 7 8 on page 257 XA9 1262 000CN Table 7 9 on page 259 XA9 1291 000CN Table 7 3 on page 245 XA9 1291 000CN Table 7 11 on page 265 XA9 1328 000CN Table 7 5 on page 251 XA9 1355 000CN Table 7 5 on page 251 XA9 1355 000CN Table 7 11 on page 265 XD2 1100 322CN Table 7 5 on page 251 XD2 1100 502CN Table 7 4 on page 248 284 Chapter 7 Parts and diagrams ENWW Index A accessories configuration page printing 226 part numbers 239 adhesive labels loading 39 output paths 38 specifications 17 21 air duct replacing 127 Alerts tab HP LaserJet Toolbox 46 Apple LaserWriter 8 driver 12 applications settings 10 Attention light locating 35 printer status messages 183 supplies status messages 180 181 B back cover replacing 122 background quality troubleshooting 194 bins output features 5 locating 7 Black print cartridge
73. 97 EN 55022 1998 Class B 3 EN 61000 3 2 2000 EN 61000 3 3 1995 A1 EN 55024 1998 FCC Title 47 CFR Part 15 Class B ICES 003 Issue 3 GB9254 1998 GB17625 1 1998 CNS 13438 Supplementary Information The product herewith complies with the requirements of the EMC Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC and carries the CE marking accordingly 1 The product was tested in a typical configuration with Hewlett Packard Personal Computer Systems Compliance testing of product to standard with exception of Clause 9 5 which is not yet in effect 2 This Device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation 3 This product includes LAN Local Area Network options When the interface cable is attached to LAN connectors the product meets the requirements of EN55022 amp CNS13438 Class A in which case the following applies Warning This is a class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures 3 For regulatory purposes this product is assigned a Regulatory model number This number should not be confused with the product name or the product number s Boise Idaho USA 1 April 2004 For regulatory topi
74. CN RB3 0011 000CN 278 Chapter 7 Parts and diagrams ENWW ENWW Table 7 15 Numerical parts list continued Part number RB3 0012 000CN RB3 0015 000CN RB3 0016 000CN RB3 0019 000CN RB3 0022 000CN RB3 0023 000CN RB3 0037 000CN RB3 0042 000CN RB3 0043 000CN RB3 0044 000CN RB3 0045 000CN RB3 0046 000CN RB3 0047 000CN RB3 0048 000CN RB3 0052 000CN RB3 0057 000CN RB3 0060 000CN RB3 0061 000CN RB3 0062 000CN RB3 0063 000CN RB3 0065 000CN RB3 0066 000CN RB3 0067 000CN RB3 0089 000CN RB3 0090 000CN RB3 0091 000CN RB3 0092 000CN RB3 0104 000CN RB3 0111 000CN RB3 0120 000CN RB3 0121 000CN RB3 0122 000CN RB3 0135 000CN Table and page Table 7 9 on page 259 Table 7 9 on page 260 Table 7 9 on page 259 Table 7 5 on page 251 Table 7 9 on page 259 Table 7 6 on page 253 Table 7 3 on page 245 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 11 on page 265 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 9 on page 260 Table 7 3 on page 245 Table 7 7 on page 255 Table 7 5 on page 251 Table 7 5 on page 251 Table 7 4 on page 247 Table 7 4 on page 247 Table 7 4 on page 247
75. Ce Aa Ce Aa Ce Aa Ce e The paper might not meet HP s paper specifications for example the paper is too moist or too rough See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e One or more print cartridges are low If you are using non HP print cartridges no messages appear on the printer control panel or in the HP LaserJet Toolbox e The imaging drum might be low or empty Print the Supplies Status page to check remaining life Replace the imaging drum if it is low or empty e If none of the print cartridges or the imaging drum is low or empty remove the print cartridges one at a time and inspect the toner roller in each to see if the roller is damaged If so replace the print cartridge e Inspect the imaging drum for toner dust oil or fingerprints elf the problem is not resolved see lf the problem is not resolved Toner specks AABbGc AagBoCc AaBbCc AaBboCc AaBbCc e The paper might not meet specifications For example the paper is too moist or too rough See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e The paper path might need to be cleaned See To use a cleaning page for details e If using a cleaning page did not solve the problem then check the fuser for contamination and replace the fuser if necessary e If the problem is not resolved see lf the problem is not re
76. Ce ProCedures sieicees deeaeccesansuceseeaduectevsaudacsacescadeetdedduavaesvaantetuees and asia 101 Parts removal Order ccoo ccoccidoniancadicnnainado nina tidad dida add 102 Removal and replacement cooococccoccocccccononoccconnnnnonnnonnnncnnnnncnnnnnn nn nnnn cnn rra anne mn Eiaa i 103 Magina taa 103 Print ere ii dc 103 Fuser Cover and fuser cooccccccnccccccononcncnonannnncnnnnnncnnnn nn nn nn nn nan n cnn eee ann rn nn nan n nr rra nn nr nn naar nnccninns 104 Right and left side COVENS AU Control panel A 107 EE E E ed N Ne eel nie eerie adie 109 Interlace COVED ALO Formatter assembles cocina aia 111 EISEM eeneg dee e 116 Bleu e EE 117 Optional tray 2 250 sheet Tra 118 Carousel engagement Motor concccccnnoccconononoccnononcnn crono cnn nro n cnn aran nn 120 Front ower Cover 121 BACK TTT TOP COVER EE 123 e E E E 125 AW QUCE AN GRAN EE 127 Laser scanner assembly coiiocccconicnninnicncci AAAA ERANA RREAK TAANE RE 128 FROME ee 130 Density sensor and top of page SENSOT eee eetteee eee eeeeeeetaeeeeeetneeeeeeeea 130 E label reader for imaging drum E labels ccceceeesneeeeeeeeneeeeeeeeneeeeeeteeeeeeeneeeeeee 132 Tray 1 Nuel fi CAE 133 Tray 1 separation pad assembly c ooocicccccnnnocccccnnonccncnonononcnn nono n o nn n nro nn nn rnnnn nn rnnnn rra 135 EE le UE 136 Wasle lOMmer SONS EE 138 Ke E le EENEG TOP ei EC 142 Printcartridge Carousel cian dra dilatada 145 Aligning Ka Ree Ee TEE 149 Registration roller assembly 0 2
77. Chapter 7 Parts and diagrams ENWW Table 7 10 Rotary assembly Rotary carousel assembly COMETA Jesse Internal assemblies 263 1 J134 J402 J402 10 41003 A na J133 J401 6 RICH J403 12 S 7 16 P Figure 7 9 Power supply base assembly 264 Chapter 7 Parts and diagrams J503 J136 J135 J201 J119 ENWW Table 7 11 Power supply base assembly e COTTON E i ENWW Internal assemblies 265 1 0CM703 4795 S SL93 J705 PM705 Figure 7 10 Rotary drive assembly 266 Chapter 7 Parts and diagrams ENWW ENWW Table 7 12 Rotary drive assembly ES Rotary drive assembly RG5 7592 000CN Motor DCM703 RG5 7593 000CN Motor PM705 RH7 1535 000CN Solenoid SL93 RH7 5340 000CN Internal assemblies 267 PCA assemblies Figure 7 11 PCA assemblies 268 Chapter 7 Parts and diagrams ENWW Table 7 13 PCA assemblies Description Part number Top of page sensor PCA RG5 6966 000CN Dc controller RG5 7605 000CN Low voltage PCA 110 127 V RH3 2254 000CN Low voltage PCA 220 240 V RH3 2255 000CN High voltage transformer PCA RG5 7606 000CN Waste toner sensor PCA RG5 7607 000CN Density sensor PCA RH7 7146 000CN Toner sensor PCA RG5 6964 000CN Sub high voltage transformer PCA RG5 7124 000CN Formatter HP color LaserJet 2550L printer Q3702 67901 Formatter includes network card HP color Q3703 67901 L
78. Contains a control panel lights simulator troubleshooting tools such as the cleaning page and calibration and maintenance and jam information e Alerts tab Set up the printer to automatically notify you of printer alerts e Documentation tab Contains the HP Color LaserJet 2550 Series Printer User Guide and Late Breaking Readme files e Device Settings window Contains information about printer and supplies status printer configuration and network e HP LaserJet Toolbox links View other HP LaserJet Toolbox enabled devices e Other links Connects to the Internet if Internet access is available for product registration and support 236 Chapter 6 Troubleshooting ENWW Parts and diagrams Chapter contents Een ET TE 237 Ordering parts ANd supplies 2 00 00 ceeeeeeceeceeecaeceeeeeeeeeeeeeeseaaaaaaecaeeeeeeeeeeeseseecsecsaaeeeneeeeeess 238 PANS EE 238 Related documentation and software ooocccccccconncencncconononencnononoronenenononnnononcnonaronnnanonon 238 E HEES eege ee Ee a 238 EE 239 Assembly locations 1 EE 241 Assembly locations 2 O8 ENEE 242 e EE 244 Internal le EE 246 PCA ASSCMDIICS EE 268 ENWW Chapter contents 237 Ordering parts and supplies Parts Order replacement parts from the following Web sites h30074 www3 hp com csn aux srvcdlvry epdo default ePDOLogin asp technicians h20141 www2 hp com hpparts customers Related documentation and software Order documentation and software from the compan
79. GS EE 226 Ee EE EE 227 General timing Charts essens a lacra clado idea ean 228 Locations ele CET iiieapdli RR 230 De controller CONNECHONS sssrds ainiin EENEN ATN E E 233 Man tie Le Balen 234 HP LaserJet Toolbox accioitcici aiii 236 To view the HP LaserJet Toolbox oooonoccccnnncccccccnnocononcnononnnnnnnnnonano nano rnnnn nn rrnnn rra 236 7 Parts and diagrams Chapter COMLEMUS pisiseeni a a A coa 237 ENWW ENWW Ordering parts and supplies 22 0 cc ceee cee eeeeeeececae cee eeeeeeeeee cece aaaanaeceeeeeeeeeeeesaceceseaeeeeeeeeeeeess 238 EN 238 Related documentation and software oocccccccconnconcncconononenonononnronnnonononnnononanonnronnnananon 238 ele 238 PCCOSSONICS nai accion e als 239 Assembly locations 1 Of egene Eggs TEER 241 Assembly locations 2 Of 21 242 OVENS a Ee 244 Internal assembles rre nrrrrersnn rnrn er nnen rneene 246 PEA ASSOMDIES arer ee e 268 Alphabetical parts let 270 Nuimenical parts E EE 278 Index Vii viii ENWW ENWW List of tables Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 1 6 Table 1 7 Table 1 8 Table 1 9 Table 2 1 Table 3 1 Table 4 1 Table 4 2 Table 4 3 Table 4 4 Table 4 5 Table 4 6 Table 6 1 Table 6 2 Table 6 3 Table 6 4 Table 6 5 Table 6 6 Table 6 7 Table 6 8 Table 6 9 Table 6 10 Table 6 11 Table 6 12 Table 6 13 Table 6 14 Table 7 1 Table 7 2 Table 7 3 Table 7 4 Table 7 5 Table 7 6 Tab
80. P Jetdirect external print server for connecting to a network e Memory The printer comes standard with 64 MB RAM e Expandability The printer has one available DIMM slot for memory expansion and additional font support The memory is expandable to 192 MB by adding a 128 MB DIMM HP color LaserJet 2550Ln The HP color LaserJet 2550Ln printer has the same features as the HP color LaserJet 2550L printer except it includes an HP Jetdirect internal print server for connecting to a 10 100Base T network This model also accepts optional tray 2 and optional tray 3 Optional tray 2 must be installed in order to install optional tray 3 2 Chapter 1 Product information ENWW HP color LaserJet 2550n The HP color LaserJet 2550n printer has the same features as the HP color LaserJet 2550Ln printer and also includes tray 2 This model also accepts optional tray 3 This model comes standard with high capacity color print cartridges that can print up to 4 000 pages ENWW Printer configurations 3 Printer features Color printing Provides laser printing in full color by using the four process colors cyan magenta yellow and black CMYK Fast print speed Prints in black on letter size paper up to 20 ppm and on A4 size paper up to 19 ppm Prints in color on A4 letter at 4 ppm Excellent print quality ImageREt 2400 provides 2400 dpi dots per inch color and laser class quality through a multilevel printing process True 600 x 600 dp
81. Removing the top cover 2 Of 2 125 Removing the top door 1 Of 2 126 Removing the top door 2 Of 2 127 Removing the alr ducts satanic dt eae Aart 128 Removing the laser scanner assembly c onnccccicnnnncccccnnnoncccnnnannccanan nc ccnnnnn nn 129 Reinstalling the top output DIN Cover 129 Removing the front Cover sarcinii iniinieiysiienirri an ianiai iiaiai 130 Removing the density sensor COVED ssssssssiessssrrnesrrrresissnnessrnnanssrnnnneannnnnns 131 Removing the density SENSOF sssesessssiesesrrsserrssttrrsttrrrsstnrnsttnnsstenssteensent 131 Removing the E label reader 1 Of 21 132 Removing the E label reader 2 Of 21 133 Removing tray 1 1 Of 2 134 Removing tray 1 2 Of 2 135 Removing the tray 1 separation pad assembly ce eeeeeeeeeeeeeeeeeeeeeeeneeees 136 Removing the gear assembly 1 Of 2 137 Removing the gear assembly 2 Of 2 138 Removing the waste toner Sensor occocccccnnocccccconnoncnncnonnnnncnnnnannncnnnnnnnncncnnnns 139 Removing the rotary drive assembly 1 Of 31 140 Removing the rotary drive assembly 2 Of 31 141 Removing the rotary drive assembly 3 Of 31 142 Removing the top plate 1 Of 3 143 Removing the top plate 2 Of 3 144 Reinstalling the grounding plate ee ceeceeceeeeeeeseenneeeeeeneeeeeeeneeeeeetaeeeeeeeas 144 Removing the top plate 3 Of 3 145 Removing the print cartridge carousel 1 Of 3 146 Removing the print cartridge carousel 2 Of i 147 Removing the print cartridge carousel 3 Of i
82. S1 75 77 G gear assembly replacing 136 gear train motor DCM701 76 Go light button locating 36 status 183 gray background troubleshooting 194 H heavy paper specifications 17 high voltage power supply locating 70 replacing 158 troubleshooting 219 HP Customer Care Online 238 HP fraud hotline 66 HP LaserJet Toolbox accessing 236 calibrating printer 63 cleaning page printing 61 device settings 47 operating systems supported 9 using 44 HP Technical Training 238 ENWW HP Web Jetadmin operating systems supported 9 using 11 humidity specifications paper storing 19 printer environment 16 l IBM OS 2 support 9 image formation developing stage 86 engine control system 70 fusing stage 89 laser beam operations 86 primary charging stage 85 separation stage 89 stages 85 system components 84 transfer stage 87 image quality color troubleshooting 200 specifications 4 troubleshooting 190 199 images repeated 199 imaging drum cleaning operations 93 E label 94 132 life expectancy 51 non HP supplies policy 66 operations 74 84 86 replacing 103 status light 35 178 status page printing 226 status checking 64 storing 65 warranty 24 information pages printing 225 troubleshooting 169 input trays See trays installing printer 32 interface cover replacing 110 interface ports cables 239 connecting to 33 locating 7 Macintosh issues 215 troubleshooting 170 types included 5 internal components diagrams and
83. age 245 Numerical parts list 281 Table 7 15 Numerical parts list continued Part number Table and page RG5 7573 000CN Table 7 3 on page 245 RG5 7579 000CN Table 7 5 on page 251 RG5 7579 000CN Table 7 6 on page 253 RG5 7579 000CN Table 7 7 on page 255 RG5 7580 000CN Table 7 7 on page 255 RG5 7581 000CN Table 7 7 on page 255 RG5 7584 000CN Table 7 4 on page 247 RG5 7585 000CN Table 7 4 on page 247 RG5 7587 000CN Table 7 6 on page 253 RG5 7587 000CN Rotary carousel assembly Table 7 10 on page 263 RG5 7589 000CN Table 7 10 on page 263 RG5 7592 000CN Table 7 6 on page 253 RG5 7592 000CN Table 7 12 on page 267 RG5 7593 000CN Table 7 12 on page 267 RG5 7595 000CN Table 7 8 on page 257 RG5 7605 000CN Table 7 6 on page 253 RG5 7605 000CN Table 7 13 on page 269 RG5 7606 000CN Table 7 11 on page 265 RG5 7606 000CN Table 7 13 on page 269 RG5 7607 000CN Table 7 4 on page 248 RG5 7607 000CN Table 7 13 on page 269 RG5 7620 000CN Table 7 5 on page 251 RG5 7621 000CN Table 7 11 on page 265 RG5 7622 000CN Table 7 5 on page 251 RG5 7624 000CN Table 7 4 on page 247 RH2 5519 000CN Table 7 9 on page 259 RH2 5524 000CN Table 7 6 on page 253 RH3 2254 000CN Table 7 11 on page 265 RH3 2254 000CN Table 7 13 on page 269 RH3 2255 000CN Table 7 11 on page 265 RH3 2255 000CN Table 7 13 on page 269 RH5 3115 000CN Table 7 9 on page 260 RH7 1533 000CN Table 7 8 on page 257 282 Chapter 7 Parts and diagrams ENWW ENWW Table 7 15 Numerical parts lis
84. allout 2 ENWW Removal and replacement 109 3 Pinch the two tabs together and then press them through the holes in the left side cover to release the on off switch Figure 5 6 Removing the on off switch Interface cover 1 Remove the fuser see Fuser cover and fuser 2 Release the tab callout 1 at the top of the interface cover and the tab callout 2 at the back cover 110 Chapter 5 Removal and replacement ENWW 3 Rotate the top of the interface cover away from the printer to remove the cover Figure 5 7 Removing the interface cover Formatter assemblies Formatter cage 1 Remove the following cover and assembly e Right side cover see Right and left side covers e Interface cover see Interface cover 2 Use a flatblade screwdriver to pinch the tab on the cable connector callout 1 to unplug the connector ENWW Removal and replacement 111 3 Remove two screws callout 2 from the formatter cage A LEERE 550000090 Figure 5 8 Removing the formatter cage 1 of 2 4 Unplug one flat flexible cable callout 3 5 Remove two screws callout 4 from the formatter cage 112 Chapter 5 Removal and replacement ENWW 6 Rotate the formatter cage upward to remove it from two hooks callout 5 Figure 5 9 Removing the formatter cage 2 of 2 Formatter 1 Remove the following cover and assemblies e Right side cover see Right and left side covers e Interface cover
85. and then click the Utilities folder Double click the HP LaserJet Toolbox icon After you open the URL you can bookmark it so that you can return to it quickly in the future 2 The HP LaserJet Toolbox opens in a Web browser The HP LaserJet Toolbox software contains the following sections e Status tab e Troubleshooting tab e Alerts tab e Documentation tab e Device Settings window e HP LaserJet Toolbox links e Other links Status tab The Status tab has links to the following main pages Device Status View printer status information This page indicates printer conditions such as a jam or an empty tray After you correct a problem with the printer click the Refresh button to update the device status Supplies Status View detailed supplies status such as the percent of toner remaining in the print cartridge and the number of pages that have been printed with the current print cartridge This page also has links to order supplies and to find recycling information Print Info Print the configuration page and various other information pages that are available for the printer such as the supplies status page and the demo page Troubleshooting tab The Troubleshooting tab has links to the following main pages Printer Lights Click the control panel lights on this simulator to find help for a specific control panel light pattern For several conditions animated video clips are available that demonstrate the recommended ac
86. and then release the keys 2 Press and release the Esc key The editor inserts an arrow symbol pointing to the left which indicates to the printer that the text following the symbol is a command not text that should be printed Note A left arrow symbol should appear which indicates to the printer that the text following the symbol is a command If the left arrow symbol does not appear or if another symbol appears then delete any characters or spaces and repeat steps 1 and 2 until the left arrow symbol appears 3 Type in uppercase letters the remainder of the command after the symbol Hint Following is an example of the MS DOS Editor window when restoring the serial number left arrow 3 12345X PJL SET SERVICEMODE HPBOISEID PJL DEFAULT SERIALNUMBER XXXXXXXXXX PJL DEFAULT SERVICEMODE EXIT left arrow 12345X To save the PJLREST file 1 Press Alt F to open the File drop down menu 2 Use the cursor down key to highlight Exit and then press Enter 3 If Save File reads C PJLREST and a flashing cursor highlights Yes then press Enter After pressing Enter the command prompt C gt appears To send the file to the printer 1 Make sure that the printer is in the Ready state 2 Atthe command prompt Cc gt type copy PJLREST printer port For example copy PJLREST LPT1 3 Press Enter The data light on the printer should flash When complete the printer returns t
87. ard and optional input trays HP color LaserJet 2550 series printers Table 2 1 Input tray configuration Printer model Standard input trays Optional input trays HP color LaserJet 2550L tray 1 125 sheet tray 2 250 sheet tray 3 500 sheet HP color LaserJet 2550Ln tray 1 125 sheet tray 2 250 sheet tray 3 500 sheet HP color LaserJet 2550n tray 1 125 sheet tray 3 500 sheet tray 2 250 sheet Note Because tray 2 and tray 3 are not included with all models they are referred to as optional tray 2 and optional tray 3 in this documentation Optional tray 2 must be installed in order to install optional tray 3 By default the printer draws first from tray 1 If tray 1 is empty the printer draws first from optional tray 3 if installed and then from optional tray 2 ENWW Input trays 37 Printer output paths Figure 2 3 38 The printer comes with the top output bin and rear output door for printing to a straight through paper path Print jobs emerge from the top output bin when the rear output door is closed Print jobs emerge from the back of the printer when the rear output door is open Top output bin Use the top output bin when printing most jobs including jobs on average weight paper and letterhead and transparencies The top output bin can hold up to 125 sheets Prevent more than 125 sheets from accumulating in the top output bin or jams can occur Rear output door Print jobs emerge from the back of
88. aserJet 2550Ln printer and HP color LaserJet 2550n printer Registration sensor PCA RG5 6967 000CN BEER ENWW PCA assemblies 269 Alphabetical parts list Table 7 14 Alphabetical parts list Description Table and page Air duct Table 7 5 on page 251 Bushing Table 7 4 on page 248 Bushing Table 7 9 on page 259 Bushing Table 7 9 on page 260 Bushing gear assembly Table 7 4 on page 248 Bushing left Table 7 4 on page 247 Bushing right Table 7 4 on page 247 Cable Table 7 9 on page 260 Cable guide Table 7 6 on page 253 Cable flat flexible laser scanner Table 7 6 on page 253 Cable formatter power RG5 7106 000CN Table 7 11 on page 265 Cable front RG5 7145 000CN Table 7 5 on page 251 Cable fuser connector dc controller RG5 7109 000CN Table 7 11 on page 265 Cable fuser motor RG5 7620 000CN Table 7 5 on page 251 Cable fuser power RG5 6971 000CN Table 7 11 on page Cable grounding RG5 7123 000CN Table 7 9 on page 259 Cable high voltage transformer RG5 7130 000CN Table 7 9 on page 260 Cable high voltage transformer RG5 7146 000CN Table 7 11 on page 265 Cable interface RG5 7122 000CN Table 7 9 on page 259 Cable motor RG5 7114 000CN Table 7 6 on page 253 Cable power 1 RG5 7621 000CN Table 7 11 on page Cable power 2 RG5 7108 000CN Table 7 11 on page Cable rotary assembly RG5 7129 000CN Table 7 10 on page 263 Cable sensor RG5 7117 000CN Table 7 6 on page 253 Cable sub high voltage transformer RG5 71
89. atus area e Printer status see Table 6 4 Printer status light messages e Attention with the ability to continue errors see Table 6 5 Attention light messages unnumbered e Accessory errors see Table 6 7 Accessory error light messages e Service errors see Table 6 8 Service error light messages Table 6 4 Printer status light messages Control panel message Event Description Recommended action log error message All control panel lights cycle The printer is in startup state Pressing buttons has no effect until the printer is in the Ready state The printer is in Ready state No action is needed Pressing o Go prints a Demo page Pressing o Go and Cancel Job simultaneously prints a Configuration page and a Supplies Status page and also prints an HP Jetdirect page if the The Ready green light is on and printer is network enabled the printer is ready to print The printer is receiving or processing data Pressing Cancel Job cancels the current job One or 3 two pages might print as the printer clears the print job The O printer returns to the Ready state after the job has been cancelled O The Ready green light is blinking 182 Chapter 6 Troubleshooting ENWW Table 6 4 Printer status light messages continued Control panel message Event Description Recommended action log error message Attention error The top cover is Close the top cover open Att
90. b browser and provides access to the embedded Web server printer documentation and printer management and troubleshooting tools You do not have to have Internet access to open and use the HP LaserJet Toolbox However if you click a link in the Other Links area you must have Internet access in order to view the site associated with the link To use the HP LaserJet Toolbox you must have one of the following browsers e For Windows Microsoft Internet Explorer 5 5 or later Netscape Navigator 6 2 or later or Opera Software ASA Opera 7 or later e For Macintosh OS X only Microsoft Internet Explorer 5 1 or later Netscape Navigator 6 23 or later or Safari 1 0 All pages can be printed from the browser To view the HP LaserJet Toolbox 1 Open the HP LaserJet Toolbox in one of these ways e On the Windows desktop double click the HP LaserJet Toolbox icon e On the Windows Start menu point to Programs and then click the HP LaserJet Toolbox e For Macintosh OS X on the hard drive click Applications and then click the Utilities folder Double click the HP LaserJet Toolbox icon Note Once you open the URL you can bookmark it so that you can return to it quickly in the future 2 The HP LaserJet Toolbox opens in a Web browser The HP LaserJet Toolbox software contains the following sections e Status tab View printer status information and supplies status information and print a configuration page e Troubleshooting tab
91. bleshooting basic steps 169 206 blank pages 210 color 200 control panel 169 curl 197 engine test 218 errormessages 204 fonts 212 215 gray background 194 high voltage power supply 219 HP LaserJet Toolbox 236 image quality 190 199 information pages 170 225 light print 192 lines 193 Macintosh issues 213 networks 207 output bins 210 paper path check 219 PostScript PS errors 212 power 169 206 printer status lights 182 printing 170 209 repetitive defects 195 199 227 resetting NVRAM 221 skew 197 ENWW slow printing 207 software 170 supplies status lights 177 tests 218 text 193 196 211 toner specks or smear 192 194 198 wiring diagrams 234 wrinkled pages 198 Troubleshooting tab HP LaserJet Toolbox 45 TrueType fonts included 5 U uninstalling software 13 UNIX support 9 USB port connecting to 33 locating 7 Macintosh issues 215 troubleshooting 170 type included 5 user replaceable parts life expectancies 50 pickup roller and separation pad 52 tray 2 separation pad 57 V voltage requirements 15 W WAIT sequence 70 warranty product 23 refilled cartridges impacton 25 waste toner cleaning operations 90 92 drum cleaning 93 sensor replacing 138 wave troubleshooting 197 Web browser requirements 44 Web Jetadmin operating systems supported 9 using 11 Web sites HP Web Jetadmin 11 parts ordering 238 weight paper specifications 17 printer 15 Windows errormessages 204 uninstalling software 1
92. bly Turn the printer off for approximately 20 to 30 minutes If the printer is plugged into a power strip or a UPS unplug it and plug the printer power cord directly into a wall socket Turn the printer back on If the error persists replace the fuser see Fuser cover and fuser 187 Table 6 8 Service error light messages continued Control panel message Event Description log error message Secondary message Fuser motor error Developer motor error Main motor error The Ready light and Go light are blinking Secondary message Bad top of page sensor Top of page sensor error Ao Q w E The Ready light is blinking Secondary message T2 clutch error Oo The Attention and Go lights are on 188 Chapter 6 Troubleshooting Recommended action Turn the printer off and then back on If the error persists replace the motor that causes the error Clean the top of page sensor Replace the imaging drum If the error persists replace the top of page sensor see Density sensor and top of page sensor Turn the printer off and then back on If the error persists replace the clutch see Gear assembly ENWW Table 6 8 Service error light messages continued Control panel message Event Description Recommended action log error message Secondary message Carousel motor error Turn the printer off and then back on If the error persists replace the
93. bration See To use a cleaning page e Small amounts of toner scatter are normal for laser printing e If large amounts of toner have scattered around the characters the paper might have high resistivity Use a different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e Change the print mode in the HP LaserJet Toolbox to dry media mode e Ifthe problem is not resolved see lf the problem is not resolved 198 Chapter 6 Troubleshooting ENWW ENWW Random image repetition If an image that appears at the top of the page in solid black repeats farther down the page in a gray field the toner might not have been completely erased from the last print job The repeated image might be lighter or darker than the field in which it appears AaBbCc AaBbCc Clean the printer Open the HP LaserJet Toolbox to use the cleaning page See To use a cleaning page for details In your program change the tone darkness of the field in which the repeated image appears In your program rotate the whole page 180 degrees to print the lighter image first Change the order in which the images are printed For example have the lighter image at the top of the page and the darker image farther down the page If the defect occurs later in a print job turn the printer off for 10 minutes and then turn
94. callout 1 from the separation pad assembly and then remove the separation pad assembly Figure 5 34 Removing the tray 1 separation pad assembly Gear assembly 1 Remove the following covers and assembly e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Back cover see Back cover e Top cover see Top cover 2 Disconnect one connector callout 1 hidden is the connector to the main motor 3 Disconnect two connectors callout 2 from the dc controller Note The dc controller has been removed from the printer in Figure 5 35 Removing the gear assembly 1 of 2 If it were not then the connectors in callout 2 would still be attached to the dc controller Reinstallation tip The connectors in callout 2 can become lost behind the dc controller upon reinstallation of the dc controller 136 Chapter 5 Removal and replacement ENWW 4 Pinch the cable holder callout 3 and then unwind the cable CAUTION Do not attempt to disconnect the clutch cable from the clutch Doing so can damage the cable 5 Remove the e clip callout 4 from the clutch and then pull the clutch away from the printer 6 From inside the printer press the small tab on the gear see callout 1 in Figure 5 20 Removing the top cover 1 of 2 to disengage the inside and outside gears callout 5 from each other Note To reinstall the gea
95. contains a 10 100Base T RJ 45 port 1 Parallel port IEEE 1284B 2 High speed USB port 3 10 100Base T port HP color LaserJet 2550Ln and 2550n printers only ENWW Interface ports 33 Control panel features The printer contains the following lights and buttons on the control panel Supplies status lights and buttons Black print cartridge light Cyan print cartridge light Magenta print cartridge light Yellow print cartridge light Rotate Carouse button Imaging drum light Printer status lights and buttons Cancet Jos button 10 Attention light amber 11 Ready light green 12 Go light and Go button both green OO OO Jo om P Gab The lights and buttons are arranged into two main groups Supplies Status top and Printer Status bottom To interpret and troubleshoot the control panel light messages see Control panel light messages Understanding Supplies Status The printer contains five lights and one button to indicate and control the status of the print cartridges and imaging drum To interpret and troubleshoot control panel light messages see Control panel light messages Black Cyan Magenta and Yellow Supplies Status lights These lights indicate when a print cartridge is low the light is on or empty or missing the light blinks The lights also indicate when a non HP print cartridge is installed the light blinks and the Attention light is on Chapter 2 Installation and operation ENWW
96. cs only Australia Contact Product Regulations Manager Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia European Contact Your Local Hewlett Packard Sales and Service Office or Hewlett Packard GmbH Department HQ TRE Standards Europe Herrenberger Strae 140 B blingen D 71034 49 7031 14 3143 USA Contact Product Regulations Manager Hewlett Packard Company PO Box 15 Mail Stop 160 Boise ID 83707 0015 USA Phone 208 396 6000 ENWW Regulatory statements 27 Safety statements WARNING Laser safety statement The Center for Devices and Radiological Health CDRH of the U S Food and Drug Administration has implemented regulations for laser products manufactured since August 1 1976 Compliance is mandatory for products marketed in the United States The printer is certified as a Class 1 laser product under the U S Department of Health and Human Services DHHS Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968 Since radiation emitted inside the printer is completely confined within protective housings and external covers the laser beam cannot escape during any phase of normal user operation Using controls making adjustments or performing procedures other than those specified in the HP Color LaserJet 2550 Series Printer User Guide may result in exposure to hazardous radiation Canadian DOC statement Complies with Canadian EMC Class B requ
97. custom sizes of print media Check the printer driver for supported sizes Capacity can vary depending on media weight and thickness and environmental conditions 3Smoothness 100 to 250 Sheffield 4HP does not guarantee results when printing with other types of heavy paper ENWW Media specifications 17 Table 1 8 Optional tray 2 specifications 216 x 279 mm 8 5 x 11 inches 60 to 105 g m 250 sheets of 75 16 to 28 Ib g m 20 Ib paper The printer supports a wide range of standard and custom sizes of print media Check the printer driver for supported sizes 2Capacity can vary depending on the media weight and thickness and environmental conditions Table 1 9 Optional tray 3 specifications 216 x 279 mm 8 5 x 11 inches 60 to 105 g m 500 sheets of 75 16 to 28 Ib g m 20 lb paper The printer supports a wide range of standard and custom sizes of print media Check the printer driver for supported sizes Capacity can vary depending on the media weight and thickness and environmental conditions General guidelines Some print media might meet all of the guidelines in this manual and still not produce satisfactory results This problem might be the result of improper handling unacceptable temperature and humidity levels or other variables over which HP has no control Before purchasing large quantities of print media always test a sample and make sure the that the print media meets the requirements spec
98. d OS 2 limited functionality The following tables list the software that is available for your operating system Table 1 1 HP color LaserJet 2550 series printer software Windows Windows Macintosh Macintosh OS 2 98 Me 2000 and OS 9 1 OS Xv XP 9 2 and 9 3 10 1 and later Windows Y Vi Installer PCL 6 Y Vi printer driver PS printer Vi Vi driver HP HP LaserJet o Y Toolbox software HP Web i Jetadmin Y software E Macintosh Vi Vi Installer ENWW Software components 9 Table 1 1 HP color LaserJet 2550 series printer software continued Windows Windows Macintosh Macintosh UNIX 98 Me 2000 and OS 9 1 OS Xv Linux XP 9 2 and 9 3 10 1 and later Macintosh PostScript o Vv printer description PPD and printer dialog extensions PDE Model scripts Available on the HP Web site 2HP LaserJet Toolbox software support for Macintosh OS X v 10 2 or later SAvailable on the HP Web site Not specific to this printer Software tips The following are some tips for working with the printer software Gaining access to the printer features The printer features are available in the printer driver Some features such as custom paper sizes and page orientation might also be available in the program that was used to create a file Change settings in the program if possible because changes that are made in the program override changes that are made in the printer driver Obtaining the late
99. de SW301 1 Push a piece of heavy paper into the slot in the top cover callout 1 to override SW301 Functional checks 219 To override the laser scanner switch 1 Use a small flatolade screwdriver to override the laser scanner switch callout 2 Figure 6 5 Overriding SW301 and the laser scanner switch 220 Chapter 6 Troubleshooting ENWW Service mode functions Note Note Note Note ENWW Service mode functions that appear in this section should be performed by trained service personnel Cold reset A cold reset sets most but not all default variables stored in NVRAM back to factory default values It typically does not reset the page count paper tray sizes localization language or formatter number To reset all variables see NVRAM initializer To perform a cold reset 1 Turn the printer off 2 Press and hold O Go 3 Turn the printer on and continue to hold Go for at least 10 seconds but for fewer than 20 seconds The Attention light turns on during a cold reset 4 Release Go If either the Go or Ready light turned off or no lights turned off before releasing o Go then repeat steps 1 through 5 5 The printer lights begin cycling from front to back The cold reset process runs until the printer is in the Ready state NVRAM initializer NVRAM initializer sets all default variables stored in NVRAM back to factory default values or to a default ROM value depending on the
100. der and lift the holder off of the low voltage PCA Figure 5 59 Removing the low voltage PCA 1 of 2 ENWW Removal and replacement 159 5 Remove six screws callout 4 from the low voltage PCA and then lift the PCA off of the ECU pan Figure 5 60 Removing the low voltage PCA 2 of 2 Paper top sensor 1 Remove the ECU pan see Front cover 2 Remove one screw callout 1 3 Lift the paper top sensor straight up to remove it from the printer 160 Chapter 5 Removal and replacement ENWW 4 Unwind the cable from the cable harness and unplug the cable from the dc controller CAUTION Do not attempt to disconnect the paper top sensor cable from the paper top sensor Doing so can damage the cable Figure 5 61 Removing the paper top sensor Fuser wrap sensor 1 Remove the ECU pan see ECU pan 2 Remove the fuser wrap sensor roller see Figure 5 53 Removing the feed drive shaft 3 Remove one screw callout 1 from the fuser wrap sensor ENWW Removal and replacement 161 4 Unwind the cable from the cable harness and unplug the cable from the dc controller Figure 5 62 Removing the fuser wrap sensor 250 sheet feeder pickup roller 1 Remove all paper from the 250 sheet feeder and then remove the 250 sheet feeder from the printer 2 Press the lift plate down and then pull the tray out of the feeder Turn the feeder upside down 4 Use a flatblade screwdriver to disengage the white plastic l
101. duct securely on a stable surface Install the product in a protected location where no one can step on or trip over the power cord and where the power cord will not be damaged If the product does not operate normally see the online user guide Refer all servicing questions to qualified personnel Information regarding FCC Class B Parts 15 and 68 requirements can be found in the user guide Trademark credits Adobe Acrobat Adobe PostScript 3 and the Acrobat Logo are trademarks of Adobe Systems Incorporated Microsoft Windows and Windows NT are U S registered trademarks of Microsoft Corporation UNIXO is a registered trademark of The Open Group Energy Star and the Energy Star logo are U S registered marks of the United States Environmental Protection Agency ENWW Table of contents 1 Product information Chapter Content Al Printer CONMNQUFANIONS eiii deed cate idea EENS AANEREN 2 HP color LaserJet 2550L coocoooccccccccccccccccooconnonconcnnncnnnnnnnnnnnnn nro nn nnnnnnnnn rn rra naar nen nn nn nnn naar 2 HP color LaserJet 2550 LI iia dae ee SEAN 2 HP color LaserJet 2550n cccccccccececceeeeeeceecneeeeeeeeeeeeeeseesecaaaaaecaeeeeeeeeeeeeeeeneeeccaaeeeeeeeeeess 3 Kine TEE A Printer Oovervlew ttt tt ttrt EARE SEEEEEEAEENEOEEEEAAEESEEEEEEAENEEEEEEEEREOSEEEEEEEEA EEEE E EEEE 7 Hardware een lee E CEET 7 Model and serial numbers sssssseseninenneeesetttttntntnst ttt tn tenea
102. e PJL commands 223 printer languages 5 printer cleaning 61 printing troubleshooting 170 209 production code 7 programs settings 10 PS emulator features 5 operating systems supported 9 PS errors 212 Q quality color troubleshooting 200 specifications 4 troubleshooting 190 199 R Readme 46 Ready light locating 36 status 182 rear frame assembly diagrams and part numbers 256 rear output door features 5 jams clearing 174 locating 7 using 38 recycling print cartridges 25 supplies 65 refilled print cartridges 25 registration clutch CL1 76 registration sensor PS711 75 77 registration roller assembly replacing 150 regulatory statements 27 removing parts 99 101 repetitive defects troubleshooting 195 199 227 ENWW replacement intervals recycling used print cartridges 25 replacement intervals supplies 51 replacing parts 99 101 reports See information pages resetting NVRAM 221 residual paper jam detection 77 resolution specifications 4 restoring factory defaults 221 resuming printing 36 revision level 7 right side cover replacing 106 roller engaging clutch CL2 76 rollers life expectancies 51 pickup replacing 52 primary charging 85 registration assembly replacing 150 testing 219 transfer 87 152 transfer belt cleaning 90 transfer plate replacing 152 tray 2 pickup replacing 162 tray 3 pickup replacing 163 rotary assembly diagrams and part numbers 262 rotary drive assembly diagrams and part
103. e 7 15 Numerical parts list continued Part number RG5 6940 000CN RG5 6942 000CN RG5 6952 000CN RG5 6956 000CN RG5 6957 000CN RG5 6964 000CN RG5 6964 000CN RG5 6966 000CN RG5 6966 000CN RG5 6967 000CN RG5 6967 000CN RG5 6971 000CN RG5 7106 000CN RG5 7108 000CN RG5 7109 000CN RG5 7114 000CN RG5 7115 000CN RG5 7117 000CN RG5 7122 000CN RG5 7123 000CN RG5 7124 000CN RG5 7124 000CN RG5 7126 000CN RG5 7128 000CN RG5 7129 000CN RG5 7130 000CN RG5 7145 000CN RG5 7146 000CN RG5 7567 000CN RG5 7569 000CN RG5 7570 000CN RG5 7571 000CN RG5 7572 000CN Table and page Table 7 9 on page 259 Table 7 10 on page 263 Table 7 4 on page 247 Table 7 4 on page 247 Table 7 10 on page 263 Table 7 10 on page 263 Table 7 13 on page 269 Table 7 4 on page 248 Table 7 13 on page 269 Table 7 9 on page 260 Table 7 13 on page 269 Table 7 11 on page 265 Table 7 11 on page 265 Table 7 11 on page 265 Table 7 11 on page 265 Table 7 6 on page 253 Table 7 7 on page 255 Table 7 6 on page 253 Table 7 9 on page 259 Table 7 9 on page 259 Table 7 11 on page 265 Table 7 13 on page 269 Table 7 11 on page 265 Table 7 9 on page 260 Table 7 10 on page 263 Table 7 9 on page 260 Table 7 5 on page 251 Table 7 11 on page 265 Table 7 3 on page 245 Table 7 3 on page 245 Table 7 3 on page 245 Table 7 3 on page 245 Table 7 3 on p
104. e colors as they appear on the screen AaBbCc AaBbCc AaBbCc AaBbCc AaBbCc E e Your print media does not meet the specifications for this printer Use a different paper such as a high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e The colors on your computer monitor differ from the printer output Try selecting Automatic on the Color tab of the printer driver e Print the Configuration and Supplies Status pages to make sure that they print correctly If not the problem is with the printer e Try printing from a different program or from one of the other printer drivers For example if you are using the PCL 6 printer driver try the PS printer driver e Extremely light colors or extremely dark colors on screen are not printing Your program might interpret extremely light colors as white or extremely dark colors as black If so avoid using extremely light or extremely dark colors e Clean the sensors and perform a calibration See Calibrating the printer 202 Chapter 6 Troubleshooting ENWW Color pages have inconsistent finish The finish on the printed color page is inconsistent AQBbCc AaBbCc AaBbCc A BbGc AQBbCc e Use a smooth paper or print media such as a high quality paper designed for laser printers Generally the smoother the paper the better the results See the HP Colo
105. e ernaia A A a A 89 age Tut e e cuidaba 93 Imaging drum E Jabel 94 Chapter contents 67 Introduction This chapter presents an overview of the relationships between major components in the printer and includes a detailed discussion of the image formation system The following systems are discussed e engine control system o laser scanner system e pickup and feed system e image formation system Figure 4 1 Cross section of the printer ES Developing cylinder contained in print cartridge Primary charging roller contained in imaging drum Imaging drum Q3964A Photosensitive drum contained in imaging drum MIX 68 Chapter 4 Theory of operation ENWW ENWW Description Transfer belt Density sensor Primary transfer roller Transfer belt cleaning roller Registration shutter Pickup roller Tray 1 Separation pad Registration roller Secondary transfer roller Auxiliary transfer belt cleaning roller Feed belt 8 Carousel Part number contained in imaging drum RH7 7146 000CN contained in imaging drum contained in imaging drum contained in imaging drum RG5 6592 000CN RG5 7585 000CN RF5 4012 000CN RG5 6939 000CN RF5 4067 000CN contained in imaging drum RB3 0063 000CN RG5 7592 000CN several see Table 7 2 Accessories for part numbers RG5 7595 000CN lower and RG5 6897 000CN upper Introduction 69 Engine control system The engine
106. e left side cover in the same manner 1 Remove one screw callout 1 from the lower edge of the cover SUERO Figure 5 2 Removing the right side cover 1 of 2 106 Chapter 5 Removal and replacement ENWW 2 Grasp the cover by the handle and by the top and then pull the cover out gently rotating the cover away from the printer as you lift it straight up CAUTION To avoid breaking two internal tabs see detail in Figure 5 3 Removing the right side cover 2 of 2 lift the cover straight up Figure 5 3 Removing the right side cover 2 of 2 3 Repeat steps 1 and 2 to remove the left side cover Reinstallation tip Reattach the tab that is closer to the front of the printer before reattaching the back tab Control panel 1 Remove the right side cover see Right and left side covers ENWW Removal and replacement 107 2 Use a flatblade screwdriver to lift the plastic catch callout 1 off of the tab 00000 Figure 5 4 Removing the control panel 1 of 2 108 Chapter 5 Removal and replacement ENWW 3 Push the control panel away from the right side cover to release three tabs callout 2 and then continue pushing the control panel to remove it Figure 5 5 Removing the control panel 2 of 2 On off switch 1 Remove the left side cover see Right and left side covers 2 On the inside of the left side cover pinch two tabs callout 1 together to remove the spring c
107. e or print spooler Print Monitor or Print Center Queue for Mac OSs to see if the printer is paused or set to print offline 6 Verify that you have installed the HP color LaserJet 2550 series printer driver Check the program to make sure that you are using the HP color LaserJet 2550 series printer driver 7 Print a page from the HP LaserJet Toolbox if available 206 Chapter 6 Troubleshooting ENWW ENWW a Ifthe page prints then the problem is in the printer driver For Windows try using the other printer driver Or for Windows or Macintosh uninstall the printer driver see the HP Color LaserJet 2550 Series Printer User Guide for information about uninstalling the printing software and reinstall it see the HP Color LaserJet 2550 Series Printer Getting Started Guide b Ifthe page does not print then the problem is in the computer or the program 8 Print a short document by using a different program that has worked in the past If this solution works then the problem is in the program you are using H this solution does not work the document does not print complete these steps a Try printing the job from another computer that has the printer software installed b If you connected the printer to the network connect the printer directly to a computer by using a parallel cable or USB cable Redirect the printer to the correct port or reinstall the software and select the new connection type you are using 9 Ifthe proble
108. ecce eee ee eeeeneeeeeeaeeeeeeeaaeeeeeeaaeeeeeenaeeeeeeaas 171 To clear jams from input areas o oo eee ceeeeee eee conc eee eeeeeeeee TETN NNER ERATA 172 To clear jams from output areas EE 174 Control panel light Messages id idad ardid 176 Supplies Status ln EE 177 Printer Status TIME ocioteca lia dada a dae 182 solving Image quality problems cocina aten ti edad 190 Printequality CHECKS ci eos aia tanta dad ico poca cai OO Solving image quality problems all print jODS oooonnnncccnnnnnicinnnnnacccccnnnnarccnnnananccnnnnn 190 Solving image quality problems color print jobs 200 Resolving problems that generated MESSAGES oocccccnnocccccococccccnoncnncnnoncnc nana conc nana rca rnnnn nr 204 Messages for both Windows and Macintosh ooccocconnonccccnnnnocccccnnnaonncnonanannnccnnn ana nccnnnnns 204 Messages for Windows Only ooccooonocccccnnncccconnnoncccnn nono co conan c crono rr rr cnn rr rr 204 Resolving problems that did not generate MESSAGES coococicicccccccccccccconcnnnonann nano conan o nnn rca 206 Troubleshooting checklist eee eee cece eeeeenee eee eeeaeeeeeeeeaeeeeseeeaeeeeeeecaeeeeeeeiaeeeeeeeaes 206 Checking the NetWork coccion A nadine 207 Solving general printing problems cece eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeseeeaeeeeeeaeeeeeeaaaees 207 solving PostScript PS ertorg cocina ut caeseedhaeeesvnnaceestnnaeereviae 212 Solving common Macintosh problems A 213 Manually rotating the print cartridge carousel
109. ecking 64 viewing with HP LaserJet Toolbox 45 status lights locating 34 printer 182 supplies 177 troubleshooting 169 Index 291 Status tab HP LaserJet Toolbox 45 STBY standby sequence 70 storing envelopes 20 paper 19 printer 16 supplies 65 sub high voltage transformer PCA replacing 157 supplies fraud hotline 66 life expectancies 50 non HP 66 ordering 65 238 recycling 65 specifications 15 status lights 34 177 status page printing 226 status checking 64 storing 65 support 238 switches diagrams 78 door interlock SW301 219 engine test 218 power 109 T technical support 238 Technical Training HP 238 telephone numbers fraud hotline 66 supplies ordering 238 temperature specifications paper storing 19 printer environment 16 tests continuous self 218 engine 218 high voltage power supply 219 paper path 219 text troubleshooting 193 196 211 timing chart 228 toner developing stage operations 86 level detection PCA 94 scatter troubleshooting 198 smear troubleshooting 194 specks troubleshooting 192 status lights 34 transfer operations 87 washing off clothing 171 waste cleaning operations 90 92 93 toner cartridges See print cartridges toner catch tray removing 151 292 Index Toolbox using 44 Toolbox HP accessing 236 calibrating printer 63 cleaning page printing 61 device settings 47 operating systems supported 9 using 44 tools required 100 top cover locating 7 open detection o
110. ected to a network HP Web Jetadmin HP Web Jetadmin is intended for printer management in commercial and enterprise networks While the HP LaserJet Toolbox is used to manage a single printer HP Web Jetadmin is used to manage groups of printers and other devices Download this software from the HP Web site at http www hp com go webjetadmin The HP Web Jetadmin Web site provides HP Web Jetadmin software in many languages Software components 11 HP Web Jetadmin is available only if the printer is connected to an Internet protocol IP based network This browser based software can be installed on one of the following supported platforms e Microsoft Windows 2000 or XP e Red Hat Linux e SuSE Linux Starting HP Web Jetadmin After you install the HP Web Jetadmin software you can start it in a supported Web browser on any computer by typing one of the following Web addresses e http server domain port where server domain is the server hostname and port is the port number that you selected during installation The default port is 8000 This information is available in the url txt file which is stored in the folder where HP Web Jetadmin is installed e http ipaddress port where ipaddress is the IP address of the computer on which HP Web Jetadmin is installed For settings that appear in both the printer driver and HP Web Jetadmin changes that are made in the printer driver override changes that are made in HP Web Je
111. eeeeeeeeee se ceaeaaeaaeeeeeeeeeeeeeseccenciesaeeeeeeeeeeeeeteees 28 Finnish laser statement iia EE a i ai 29 Chapter contents 1 Printer configurations Thank you for purchasing the HP color LaserJet 2550 series printer The printer is available in the following configurations HP color LaserJet 2550L The HP color LaserJet 2550L printer is a four color laser printer that prints letter size pages up to 20 pages per minute ppm in black and white A4 size pages up to 19 ppm and it prints letter A4 size pages at 4 ppm in color It includes a PCL 6 printer driver and has PostScript level 3 emulation e Trays The printer comes with a multipurpose tray tray 1 that holds up to 125 sheets of various print media or 10 envelopes The printer can also accept an optional 250 sheet tray tray 2 for standard sizes and optional 500 sheet tray tray 3 for A4 and letter sizes Optional tray 2 must be installed in order to install optional tray 3 See Supported media weights and sizes for more information e Print cartridges This model comes standard with color print cartridges cyan yellow and magenta that can print up to 2 000 pages at 5 percent coverage It comes with a black print cartridge that can print up to 5 000 pages at 5 percent coverage A typical business letter has 5 percent coverage e Connectivity The printer provides parallel and universal serial bus USB ports for connectivity The printer also accepts an optional H
112. eeeeeeseenaees 70 POWEI ONM SCQUENCE EE 72 MOTOS NA CL EE 73 Laser sCanner System assorrir o inini nnan innana sev dian sacivaulagaasseesendsee ol de Pickup and feed SYSTEM smc EEN a a ee Paper CG 76 Jam detection aisicom a a aa aaa a aaaea aaa Eaa i a 77 Photosensors and SWICHES i caian a dada 78 Solenoid and Clutches irice iaaiiai aaia iaai 80 Printed circuit assemblies 2 0 0 2 2 eee cee eeeeeeeeeeee cece eee cette eee ca aaeaeceeeeeeeeeeeeeeeececaeaeeeeeeeeeeteeeeea 82 MAJE TO MAIN SM EE 84 mage formation procesSS eeeeeeeeeeeeeee eee eeeeeee eee eeeeeeeeeeteneeeeeeeeeeeaaeeeseeeeaeeeeseeeaeeeeeeeaaees 85 Latent image formation Stage ocoooonnocccccnnnocccccconnonccncnnnnnnncnnnnnnnnnccnn nan n nc cc nn anar nc cnn naar nnccinns 85 ENWW ENWW Developing Stage ciclo A 86 Transfer SAG Cos vecccesdssnaceastecadesaanaeddnet danna des alii id tino 87 FUSING Stage cier dia lib 89 Print Cann e cutis 93 Imaging drum E Jabel 94 5 Removal and replacement EL 97 INTOdUCION noi ais ceda 99 Removal and replacement strategy oooccooonnncccnnnnccccnnonoccnnnorcccnn no rn cnn narrar rr 99 Electrostatic dISCMarQe cocino da 99 User replaceable parts oooooooccncococccococcnnncncnnnnnononncnncnnnnnnnnn nono nn cnn nnnnnnnnnn nn nnnn nn rra nanannn mann 99 Required TOONS iia aaa aa 99 Before performing Service occoccincocccccnononncccconnnnccncnnnnnnncnnn nan nn cnn naar c cnn nr rr nn nnn nn rn na nnnannnnnnnnad 101 Pre Servi
113. eeeesesaeaeeseeeeeteees 44 Supported browsers c oooccccooccoconoonccncnnocnnnnnnn ono nnnnn rn nn nana nn nn nn nn nn nn nn nn nn nan Rmn nnrnnrnnrrnnnnannnnnnnns 44 Viewing the HP LaserJet Toolbox oooooocccccnnncccccnnnoccnccnononnnncnnnnn cnn c nana nc nc nnnn nr rr rana rara 45 SA E 45 Troubleshooting tab aora 45 AlenS Le canta ir aaa 46 DOCUMENTATION BC Le oia ii id EE a EETA 46 Device Settings window ooonnocccnnncoccnnnococnnononcn cnn non nn narrar nn rra 47 Other INKS ci ed dea 48 Chapter contents 31 Operating environment Place the printer on a sturdy level surface in a well ventilated area that meets the following environmental requirements e temperature 15 to 32 5 C 59 to 90 5 F e humidity 10 percent to 80 percent relative humidity no condensation e away from direct sunlight open flames and ammonia fumes e with sufficient space around the printer for access and ventilation 1068 mm 42 0 inches y 387 mm 15 2 inches 590 mm 23 2 inches gt 505 mm 19 9 inches ja 25 3 inches 694 mm 27 3 inches gt 830 mm 32 7 inches Figure 2 1 Space required 32 Chapter 2 Installation and operation ENWW Interface ports The printer has two interface ports an IEEE 1284B parallel port and a high speed USB port The HP color LaserJet 2550Ln and 2550n models include an HP Jetdirect internal print server that
114. eet 84 Image formation PrOCESS ooooinnccccnnnconoccnnnonononnnnonn conca nnnnn nn nn narran rn r rn r rra 85 Step 1 primary charging ooonoococcnnnnocccccnnonocancnononano cnn nn nono nc n rra n rra r anar rnnnn nd 86 Step 2 laser beam exposure ooocooccccccccoconconnoncnncnnnnnnnnncnnnnnnnnnnnnncnnn cnn cnn ccnannanned 86 Developing Block dek dede 87 Step deEVeloping irc ee ANE 87 Step 4 primary transfer oooocccocccncccoconococoncnnnnnnnonnnnnnnnnnnnn mo nnnnnnnnnnannnnnnnnnnnnannnnns 88 Step D secondary transfer ooreo daii dese evens ies deed ege ee 89 Step 6 Separation i cereus eae id 89 SSP i TUSING TTT 90 Step 8 roller charging auxiliary transfer belt cleaning roller 90 Step 9 roller charging transfer belt cleaning roller 0 ceeeeeeeeteeeeeeees 91 Step 10 transfer belt cleaning 0 cccceccececeeseceseeeeteceecedeeeesevecceteaeeeeaeeeceeeses 92 Step AAs e rue Te TTT 93 uge er gee cri ncdetienettieliviarni ei athe aie 94 Print cartridge E label 5 ated dE EES 95 Removing the fuser cover and fuser ooocoonocccccnnncoccccccccnnannncncnnn anno nccncnnnnns 105 Removing the right side cover 1 Of 2 106 Removing the right side cover 2 Of 2 107 Removing the control panel 1 Of 21 108 Removing the control panel 2 Of 21 109 Removing the on off SWItCh 22 eect eee inaa teers tenes na nan ccc cnn ana ncnnnna 110 Removing the interface COVED ooocccccinnoccccconoonccccnnnnnnncnn
115. el connection HP Jetdirect en3700 Fast Ethernet Hi Speed USB 2 0 connection HP Jetdirect 380 x 802 11b wireless USB connection D D o 8 8 8 8 8 J7942A J7942A n a J6061A J6061A n a ENWW Assembly locations 1 of 2 Ho Ae D gt o 5 2 Els 3 o oye Elo co o D To See Table 7 9 Middle frame assembly See Table 7 4 Front frame assembly Rear frame assembly Ref Description Middle frame assembly Front frame assembly 241 Accessories ENWW Assembly locations 2 of 2 Ce CITA Fuser 110 127 V RG5 7572 000CN Fuser 220 240 V RG4 7573 000CN Power supply base assembly See Table 7 11 Power supply base assembly e Rotary assembly RG5 7587 000CN Main drive assembly RG5 7579 000CN Rotary drive assembly RG5 7592 000CN 242 Chapter 7 Parts and diagrams ENWW ENWW Accessories 243 Covers Figure 7 1 Covers 244 Chapter 7 Parts and diagrams ENWW Table 7 3 Covers 3 i ENWW Covers 245 Internal assemblies 5j SCH J128 cf Ls 22 33 gt 4108 Figure 7 2 Front frame assembly 246 Chapter 7 Parts and diagrams ENWW Table 7 4 Front frame assembly i ENWW Internal assemblies 247 Table 7 4 Front frame assembly continued gt gt z gt 7 S x 248 Chapter 7 Parts and diagrams ENWW ENWW Internal assemblies 249
116. ems that did not generate messages 207 Table 6 10 Solving general printing problems continued The print job is extremely slow In the printer driver the Type or Size is set e Ifyou are printing on heavy paper the Type incorrectly for the media in the printer or Size should be set to a heavy paper setting The printer prints more slowly to provide better quality Wait for the job to print e Ifyou are not printing on heavy paper set Type or Size in the printer driver to plain paper e In the default settings for this printer click the Paper tab and make sure that Type is set to plain paper You can override this setting from the printer driver when you print on heavy paper An issue might exist with the driver e Ifyou are printing using a PCL driver print using the PS driver or vice versa The printer pulls paper or print media from the wrong tray The Source tray selection might be incorrect For Windows make sure that the Source is selected from the Print dialog box which is part of the program if possible or in the printer driver If you select the Source in the printer driver and then select a different Source in the Print dialog box the Source setting in the printer driver changes to match the Source setting in the Print dialog box For Macintosh set the Source in the Print dialog box Remove any media from other trays to make the printer select from the tray you want and then press 9 Go
117. eneva or Monaco fonts The printer might be substituting fonts Select Options in the Page Setup dialog box to clear the substituted fonts Table 6 13 USB Problems You are unable to print from a third party USB card This error occurs when the software for USB When adding a third party USB card you might printers is not installed need the Apple USB Adapter Card Support software The most current version of this software is available from the Apple Web site ENWW Resolving problems that did not generate messages 215 Table 6 13 USB Problems continued When connected using a USB cable the printer does not appear in the Macintosh Chooser after the driver is selected This problem is caused by either a software or hardware component Software troubleshooting e Make sure that your Macintosh supports USB Verify that your Macintosh has Mac OS 9 1 9 2 9 3 or OS X v 10 1 or later Make sure that your Macintosh has the appropriate USB software from Apple Note The iMac and Blue G3 desktop Macintosh systems meet all of the requirements to connect to a USB device Hardware troubleshooting Make sure that the printer is turned on Make sure that the USB cable is properly connected Make sure that you are using the appropriate high speed USB cable Make sure that not too many USB devices are drawing power from the chain Disconnect all devices from the chain and connect the cable directly to the USB po
118. enoid Two photo interrupters PS1 and PS711 detect media as it passes If media does not reach or pass each sensor within the specified time period the dc controller determines that a jam has occurred and alerts the video controller circuit The following components are identified in Figure 4 6 Pickup and feed system PS1 fusing delivery paper sensor PS711 registration paper sensor PS718 tray 1 multipurpose tray paper sensor PS720 fuser wrap jam sensor DCM701 main motor PM702 fuser motor SL92 tray 1 pickup solenoid Pickup and feed system 75 e CL1 registration clutch e CL2 roller engaging clutch De controller 53 3 f af o 3 c z Cos l5 Ec O z Z ou SS 5 SS 0 Ir 5a zs 9 2 92 SG i 8 oz lt 5 us E cs 125 Lu G ao lt UA SEH lt es g eu cS SOF aH SES zom EO ds AEE Wee SECH ZTO 056 5089 29 Szalik 350 ow 2 Sek roe Eu ere SE agaa T cho oS GER Lor JOS ree cof Gurg JE pE os EIER SIE a DE TD ausSi gt rg St 8 dP 58 23 go Fu ra a 95 a a 8 a GC Ww E Top output bin W delivery roller y Collor e T I A y i Transfer belt gt I I I Tray 1 pickup i Registratior roller g shutter Lifting plate transfer roller Registration roller Figure 4 6 Pickup and feed system Paper trays The dc controller drives the operation sequence of the
119. ention error The printer is out Load media of media Attention error The printer has a Clear the jam see Clearing jams jam 40022 If the location of the jam is not apparent check the HP LaserJet Toolbox to find the jam location e If the jam is under the imaging drum toggle the registration sensor to check its movement and replace the registration sensor if it does not move freely The Attention amber light is blinking If the jam is in the fuser area toggle the fuser exit sensor to check its movement and replace the fuser exit sensor if it does not move freely Attention error The printer has Make sure that the media is misfed media 40119 loaded correctly in the input tray Open and then close the top cover The fuser is missing or is not Replace the fuser installed correctly 50014 The top cover has been opened and then closed Or Pressing 9 Go returns the printer to the Ready state If you do not press ei Go the printer automatically returns to the Ready state after approximately 10 seconds G il You pressed Rotate Carousel Pressing Rotate Carousel brings another print cartridge to the top position The Go green light is blinking ENWW Control panel light messages 183 Table 6 5 Attention light messages unnumbered Event log error message Control panel message Description A manual feed job was sent to the printer and the printer is
120. er and A4 size paper Optional tray 2 must be installed in order to install optional tray 3 e One 125 sheet output bin and one output door Select the top output bin face down for most jobs including transparencies Use the rear output door face up for jobs on heavy paper light paper or special print media e Straight through paper path capability from tray 1 to the rear output door e Manual two sided printing duplexing See Interface cover Printer driver features e Fast printing performance built in Intellifont and TrueType scaling technologies built in HP GL 2 vector graphics and advanced imaging capabilities are benefits of the PCL 6 printer language The PCL 6 also includes 45 scalable TrueType fonts and one bitmapped Line Printer Font The PCL 6 printer language also included PostScript PS level 3 emulation language e Includes 35 built in PS language fonts and fonts Automatic language switching e The printer automatically determines and switches to the appropriate printer language such as PS or PCL 6 for the print job Interface connections e Bidirectional enhanced capabilities port ECP type B parallel port IEEE 1284 compliant e High speed USB port e Accepts an optional HP Jetdirect external print server HP color LaserJet 2550L printer The HP color LaserJet 2550Ln and 2550n printers include an HP Jetdirect internal print server ENWW Printer features 5 Enhanced memory and mem
121. er contents 97 98 Ree ee 151 Transt r roller Hl 152 RRC ee 152 Fe ed drive E iain ae Whe naa adele eal ee aa naslov laws 153 ECU PAIN meitin ad o rd EE Meester tales Ee 154 Sub high voltage transformer DCH 157 High voltage transformer PCA cccccnncccccnnoconcccnnnnnonncnnn nn aiiai eii rr 158 Low voltage PA eel ee OD Paperop Senso Aiseno de DE tie cartier anasto ad 160 FUSErFWIrap SENSOR EE 161 250 sheet feeder pickup roller oooooooococcoccocccccccccccccananoononconcconnnnnnnnnnnnnno nn ncnnncnnnnnnnnnannnnad 162 500 sheet feeder pickup roller cccccccecceceeeeeeeeeeneeceeeeeeeeeeeseesecaaaaecaeeeeeeeeeneeeneeneeaeeas 163 Chapter 5 Removal and replacement ENWW Introduction WARNING Note CAUTION ENWW This chapter documents removal and replacement of field replaceable units FRUs only Removal and replacement strategy Replace parts in the reverse order of their removal Directions for difficult or critical replacement procedures are included The sheet metal edges of the product can be sharp Use caution when working on the product Note the length diameter color type and location of each screw Be sure to return each screw to its original location during reassembly Incorrectly routed or loose wire harnesses can interfere with other internal components and can become damaged or broken Frayed or pinched harness wires can be difficult to locate When replacing wire harnesses always use the
122. er on 72 print cartridges 93 printed circuit assemblies PCAs 82 sensors and switches 78 sequences 70 solenoids 80 timing chart 228 ordering parts 238 supplies 65 238 OS 2 support 9 ENWW output bins features 5 jams clearing 174 locating 7 troubleshooting 210 using 38 output quality color troubleshooting 200 specifications 4 troubleshooting 190 199 P page skew troubleshooting 197 pages per minute 4 paper curl troubleshooting 197 loading tray 1 39 loading tray 2 40 loading tray 3 42 output paths 38 path check 219 selecting 18 skew troubleshooting 197 specifications 17 19 tray 1 types supported 17 troubleshooting 208 wrinkled troubleshooting 198 paper input trays See trays paper jams See jams paper output bins features 5 locating 7 paper top sensor replacing 160 parallel port connecting to 33 locating 7 troubleshooting 170 type included 5 parts ordering 238 removing and replacing 99 101 paused printing 36 PCAs printed circuit assemblies 82 268 PCL drivers backward compatibility 11 features 5 operating systems supported 9 PDEs Macintosh 12 personalities 5 phone numbers fraud hotline 66 supplies ordering 238 photosensors density replacing 130 diagrams 78 fuser wrap replacing 161 jam detection 77 Index 289 paper top replacing 160 pickup and feed system 75 top of page replacing 130 tray2and3 76 waste toner replacing 138 physical specifications 32 pickup and feed system e
123. eral timing charts for detailed information about timing Prepares the printer to receive print commands ENWW Table 4 1 Basic sequence of operation continued COMINO COCO CN CS INTR initial rotation PRINT print LSTR last rotation ENWW From the time of the print command until detection of the HP1 transfer belt home position detection signal for the first color From the end of the INTR period until detection of the transfer belt home position signal for the secondary transfer From the end of the PRINT period until the main motor stops rotating Prepares the photosensitive drum for printing Forms the image on the photosensitive drum and transfers the toner image to the transfer belt Transfers the toner image After LSTR the printer on the transfer belt to the returns to STBY media and delivers the printed media Engine control system 71 Power on sequence The power on sequence is represented by the flowchart in Figure 4 3 Power on sequence Power on CPU initialization ASIC initialization Formatter communication ready Formatter communication start Printer ID check Motor initial drive Main motor Toner cartridge motor Developing rotary motor Fuser motor Engaging motor Memory tag for toner cartridges imaging drum communication start Y Residual Toner cartridge paper door open Fai
124. error message is listed in the following tables along with possible causes and steps to resolve the identified errors See Figure 6 1 Control panel lights and Table 6 2 Control panel lights legend for descriptions of the control panel elements and a legend for understanding the tables Use the HP LaserJet Toolbox to view animations of the light patterns and to see their messages Figure 6 1 Control panel lights Table 6 2 Control panel lights legend Meaning of symbol Light off Light on Light blinking SS 176 Chapter 6 Troubleshooting ENWW Supplies Status lights This section describes the meaning of the patterns for the lights in the Supplies Status area Information about supplies also appears in the HP LaserJet Toolbox For more information about how to use and view the HP LaserJet Toolbox see HP LaserJet Toolbox Table 6 3 Supplies Status light messages Control panel message Event Description Recommended action log error message The black print cartridge is low The printer continues to print without any action required until the print cartridge is empty Order a new print cartridge The cyan print cartridge is low The printer continues to print without any action required until the print cartridge is empty Order a new print cartridge The magenta print cartridge is low The printer continues to print without any action required until the print cartridge is empty Order a ne
125. es and imaging drum Supplies life The life of the imaging drum depends on the number of black only or color pages that print jobs require An HP color LaserJet 2550 series printer imaging drum could last an average of 20 000 pages when printing black only pages and 5 000 pages when printing color pages Actual life lies somewhere between these two numbers depending on the number of black only pages you print versus color The average life is between 6 000 and 8 000 pages Imaging drum life is also affected each time the printer calibrates because calibrating causes the imaging drum to rotate Imaging drum life is measured in terms of number of rotations rather than number of pages printed The type and length of print jobs also affects drum life A series of short print jobs uses more drum life than an equivalent number of pages printed in a single large job To extend drum life print multiple copies of a print job at one time rather than sending the same job to the printer multiple times The life of a print cartridge depends on the amount of toner that print jobs require When printing text at 5 coverage black print cartridges last an average of 5 000 pages and cyan magenta and yellow print cartridges last an average of 2 000 pages Extended life cyan magenta and yellow print cartridges last an average of 4 000 pages A typical business letter has 5 coverage The imaging drum and print cartridges for this printer are not co
126. esive strips or flaps Envelopes with a peel off adhesive strip or with more than one flap that folds over to seal must use adhesives that are compatible with the heat and pressure in the printer The extra flaps and strips might cause wrinkling creasing or even jams and might damage the fuser Labels Select the type of label that you are using from the Print dialog box or the printer driver To avoid damaging the printer use only labels that are recommended for laser printers To prevent serious jams always use tray 1 to print on labels and always use the straight through paper path Never print on the same sheet of labels more than once or print on a partial sheet of labels Media specifications 21 When selecting labels consider the quality of each component e Adhesives The adhesive material should be stable at 210 C 410 F which is the printer fusing temperature e Arrangement Only use labels with no exposed backing between them Labels can peel off sheets with spaces between the labels causing serious jams e Curl Before printing labels must lie flat with no more than 13 mm 0 5 inch of curl in any direction e Condition Do not use labels that have wrinkles bubbles or other indications of separation For more information see Imaging drum Transparencies Use only tray 1 to print on transparencies Select Transparencies from the Print dialog box or the printer driver The printer supports printing in co
127. ever and then rotate the lever toward the front of the feeder to release the roller 162 Chapter 5 Removal and replacement ENWW 5 Lift the pickup roller up to remove it Figure 5 63 Removing the 250 sheet feeder pickup roller 500 sheet feeder pickup roller Lift the printer off of the 500 sheet feeder Remove all paper from the 500 sheet feeder Press the lift plate down and then pull the tray out of the feeder Turn the feeder so that it rests on its back side a fF ob gt Insert the flatblade screwdriver into the slot callout 1 on the right roller shaft cover and then pry the cover off of the feeder ENWW Removal and replacement 163 6 Insert the flatblade screwdriver into the slot callout 2 on the left roller shaft cover and then pry the cover off of the feeder Figure 5 64 Removing the 500 sheet feeder pickup roller 1 of 2 7 Use the flatblade screwdriver to disengage the white plastic lever callout 3 and then rotate the tab toward the front of the tray to release the roller 164 Chapter 5 Removal and replacement ENWW 8 Lift up the pickup roller to remove it Figure 5 65 Removing the 500 sheet feeder pickup roller 2 of 2 ENWW Removal and replacement 165 166 Chapter 5 Removal and replacement ENWW Troubleshooting Chapter contents ENWW E Wen ET pasic troubleshooting EE 169 Clearing Ru 171 Where to lOOK TOFJAMS vota 171 To clear jams from inside the printer cc ecc
128. f the following e Check the supplies status lights on the printer control panel These lights indicate when a print cartridge or the imaging drum is low or empty The lights also indicate when a non HP print cartridge is first installed See Supplies Status lights to interpret the light patterns Press o Go and O Cancel Job simultaneously A Supplies Status page and the Configuration page and possibly the HP Jetdirect page prints Check the supplies levels on the Supplies Status page If the supplies levels are low you can order supplies through your local HP dealer by telephone or online See Parts and diagrams for part numbers See www hp com go lisupplies to order online To check status and order supplies using the HP LaserJet Toolbox You can configure the HP LaserJet Toolbox to notify you when the supplies are low You can choose to receive alerts by e mail or as a pop up message or taskbar icon To order supplies by using the HP LaserJet Toolbox in the Other Links area click Order supplies For more information see Other links To check status and order supplies using HP Web Jetadmin In HP Web Jetadmin select the printer device The device status page shows supplies information To order use the HP LaserJet Toolbox Or see Parts and diagrams Storing supplies Follow these guidelines for storing print cartridges and the imaging drum e Do not remove the print cartridge or imaging drum from its package
129. from state to state province to province and country region to country region The above warranties are exclusive and no other warranty whether written or oral is expressed or implied The Hewlett Packard Company specifically disclaims the implied warranties or merchantability and fitness for a particular purpose To the extent allowed by applicable law in no event shall Hewlett Packard Company be liable for any incidental consequential special indirect punitive or exemplary damages or lost profits from any breach of this warranty or otherwise In the event that your product proves to be defective please return to place of purchase with a written description of the problem Chapter 1 Product information ENWW Print cartridge information ENWW At 5 page coverage a black print cartridge will print approximately 5 000 pages Color print cartridges yellow cyan and magenta will print 2 000 pages each and extended life color print cartridges yellow cyan and magenta will print 4 000 pages each These estimates are only approximate usage conditions and print patterns can cause results to vary Refilled print cartridges While HP does not prohibit the use of refilled print cartridges during the warranty period or while the product is under a maintenance contract it is not recommended for the following reasons e Repairs resulting from the use of refilled cartridges are not covered under HP warranty or maintenance contracts
130. ge environment should be at or near room temperature and not too dry or too humid Remember that paper is hygroscopic it absorbs and loses moisture rapidly Heat works with humidity to damage paper Heat causes the moisture in paper to evaporate while cold causes it to condense on the sheets Heating systems and air conditioners remove most of the humidity from a room As paper is opened and used it loses moisture causing streaks and smudging Humid weather or water coolers can cause the humidity to increase in a room As paper is opened and used it absorbs any excess moisture causing light print and dropouts Also as paper loses and gains moisture it can distort This issue can cause jams As a result paper storage and handling are as important as the paper making process itself Paper storage environmental conditions directly affect the feed operation and print quality Media specifications 19 Care should be taken not to purchase more paper than can be easily used in a short time about three months Paper stored for long periods can experience heat and moisture extremes which can cause damage Planning is important to prevent damage to a large supply of paper Unopened paper in sealed reams can remain stable for several months before use Opened packages of paper have more potential for environmental damage especially if they are not wrapped with a moisture proof barrier The media storage environment should be properly maintained
131. gs select Print Directly to Printer and then click OK Try again to print 204 Chapter 6 Troubleshooting ENWW ENWW General Protection Fault Exception OE Spool32 Illegal Operation Other Windows messages Restart the computer and try again Clear the contents of the computer Temp folder which is generally located in C Windows 95 98 and Me or C Winnt NT 4 0 2000 and XP Change the graphics mode in the driver from raster to vector or from vector to raster For more information see Microsoft Windows documentation that came with the operating system or computer Resolving problems that generated messages 205 Resolving problems that did not generate messages Troubleshooting checklist If the printer is not responding properly complete the steps in the following checklist in order If the printer does not pass a step follow the corresponding troubleshooting suggestions If a step resolves the problem you can stop without performing the rest of the steps on the checklist 1 Make sure that the printer Ready light is on If no lights are on complete the following steps a Check the power cable connections b Make sure that the power switch is on c Check the power source by plugging the printer directly into the wall or into a different outlet d If none of these measures restores power replace the low voltage power supply e If replacing the low voltage power supply does not
132. hp color LaserJet 2550 printer hp color LaserJet 2550 series printer Service Manual Copyright information 2004 Copyright Hewlett Packard Development Company L P Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws The information contained herein is subject to change without notice The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services Nothing herein should be construed as constituting an additional warranty HP shall not be liable for technical or editorial errors or omissions contained herein Part number Q3702 90923 Edition 1 5 2004 Safety information WARNING Potential Shock Hazard Always follow basic safety precautions when using this product to reduce risk of injury from fire or electric shock Read and understand all instructions in the user guide Observe all warnings and instructions marked on the product Use only a grounded electrical outlet when connecting the printer to a power source If you do not know whether the outlet is grounded check with a qualified electrician Do not touch the contacts on the end of any of the sockets on the printer Replace damaged cords immediately Unplug this product from wall outlets before cleaning Do not install or use this product near water or when you are wet Install the pro
133. i text and graphics Adjustable settings to optimize print quality The HP UltraPrecise print cartridge has a finer toner formulation that provides sharper text and graphics Ease of use Few supplies to order Supplies are easy to install Convenient access to printer information and settings by using the HP LaserJet Toolbox software Convenient access to all supplies and to the paper path through the front door Expandability Optional tray 2 Included with the 2550n model compatible with all other models This 250 sheet tray for standard sizes reduces how often you have to add paper to the printer Only one 250 sheet tray can be installed on the printer Optional tray 3 This 500 sheet tray for letter and A4 sizes reduces how often you have to add paper to the printer Only one 500 sheet tray can be installed on the printer Optional tray 2 must be installed in order to install optional tray 3 Optional HP Jetdirect external print server for connecting to a network HP color LaserJet 2550L printer One DIMM slot for adding memory and fonts 4 Chapter 1 Product information ENWW Flexible paper handling e Adjustable tray 1 multipurpose tray for letterhead envelopes labels transparencies custom sized media postcards glossy paper HP LaserJet Tough paper and heavy paper e Optional tray 2 250 sheet tray that is adjustable for several standard sizes of paper e Optional tray 3 500 sheet tray for lett
134. ications HP color 325 mm 451 mm 482 mm 21 5 kg LaserJet 2550L 12 80 in 17 76 in 18 98 in 47 5 lbs printer without optional trays HP color 376 mm 451 mm 482 mm 23 9 kg LaserJet 2550n 14 80 in 17 76 in 18 98 in 52 7 Ibs printer with tray 2 250 sheet HP color 512 mm 451 mm 482 mm 29 3 kg LaserJet 2550n 20 16 in 17 76 in 18 98 in 64 6 lbs printer with tray 2 and optional tray 3 500 sheet Table 1 3 Supplies specifications Imaging drum life based on 5 coverage 20 000 pages when printing only in black 5 000 pages when printing in color 6 000 to 8 000 pages is the average life Print cartridge life based on 5 coverage Black 5 000 pages Yellow cyan and magenta 2 000 pages each Yellow cyan and magenta 4 000 pages each HP extended life color cartridges Table 1 4 Electrical specifications EES During printing black and 400 W average 403 W average white ENWW Specifications 15 CAUTION Table 1 4 Electrical specifications continued item AM O vottmodels models 220 volt models models A recommended circuit Ce A EE A capacity Power requirements are based on the country region where the printer is sold Do not convert operating voltages This will damage the printer and void the product warranty Table 1 5 Environmental specifications printer and print 20 to 27 C 15 to 32 5 C 20 to 40 C cartridge 68 to 81 F 59 to 90 5 F 4
135. ies listed in the following table some documentation and software is available at the following Web sites Table 7 1 Technical support Web sites HP Customer Care Online www hp com support Software drivers support documentation and answers to frequently asked questions HP Technical Training education itrc hp com Trainerll en US index jsp North America Classes and schedules Supplies Printer supplies are listed in Table 3 1 Life expectancies of supplies Consumables are available directly from HP at the following numbers e US 800 538 8787 e Canada 800 387 3154 in Toronto 416 671 8383 e United Kingdom 0734 441212 e Germany 0130 3322 Contact your local HP Parts Coordinator for other local phone numbers 238 Chapter 7 Parts and diagrams ENWW Accessories Table 7 2 Accessories Product name Description Product number Part number Exchange number Print cartridges Print cartridge Print cartridge Print cartridge Print cartridge Print cartridge Print cartridge Print cartridge Imaging drums Black print Q3960A cartridge Yellow print Q3972A cartridge 2k Yellow print Q3962A cartridge 4k Magenta print Q3973A cartridge 2k Magenta print Q3963A cartridge 4k Cyan print Q3971A cartridge 2k Cyan print Q3961A cartridge 4k Q3960 67901 Q3960 67902 EMEA Q3972 67901 Q3972 67902 EMEA Q3962 67901 Q3962 67902 EMEA Q3973 67901 Q
136. ified in the HP Color LaserJet 2550 Series Printer User Guide and in the HP LaserJet Printer Family Print Media Guide For ordering information see Ordering parts and supplies CAUTION Using print media that does not meet HP specifications can cause problems for the printer requiring repair This repair is not covered by the HP warranty or service agreements 18 Chapter 1 Product information ENWW ENWW This printer accepts a variety of media such as cut sheet paper including up to 100 recycled fiber content paper envelopes labels transparencies glossy paper HP LaserJet Tough paper and custom size paper Properties such as weight composition grain and moisture content are important factors affecting printer performance and output quality Print media that does not meet the guidelines outlined in this manual can cause the following problems e Poor print quality e Increased jams e Premature wear on the printer requiring repair Paper and print media Fusing compatibility Must not scorch melt offset or release hazardous emissions when heated to 210 C 410 F for 0 1 second Moisture content 4 to 6 by weight Smoothness 100 to 250 Sheffield For complete print media specifications for all HP LaserJet printers see the HP LaserJet Printer Family Print Media Guide To download the guide in PDF format go to www hp com support lipaperguide Printing and storage environment Ideally the printing and media stora
137. information about HP print media specifications Also see the HP LaserJet Printer Family Print Media Guide http www hp com support lipaperguide Print a Configuration page and Supplies Status page at the printer by pressing 0 Go and O Cancel Job simultaneously If the pages do not print then the problem is in the hardware rather than in the software e Check printer status messages on the Configuration page e Check the Supplies Status page to see if any supplies are low or empty Note that no information is provided for non HP print cartridges Replace non HP print cartridges with HP print cartridges 5 Use the HP LaserJet Toolbox to print a Demo page If the page prints correctly there might be a problem with the printing software Uninstall the printing software and then reinstall it see the HP Color LaserJet 2550 Series Printer Getting Started Guide 6 Try printing from one of the other printer drivers For example if you are using the PCL 6 printer driver print from the PS printer driver 7 Try printing from a different program If the page prints correctly the problem might be in the program from which you were printing 8 Restart the computer and the printer and try printing again If the problem is not resolved choose one of these options e If the problem is affecting all printed pages see Solving image quality problems all print jobs e Ifthe problem is affecting only pages that are printed in color
138. ing information The printer does not respond when the Print command is selected in the software Cause The printer experienced an error Check the control panel lights on the printer to determine if an error exists If no control panel lights are on the printer is not Check the power cable connection between receiving power the printer and the power source Check that the power switch is on Check that the power source the wall outlet is receiving power If the problem persists replace the high voltage power supply If after replacing the high voltage power supply the problem persists replace the dc controller The printer might be in Manual Feed mode the Add media to tray 1 if it is empty If media is Attention light is blinking and Go is light on already in the tray press Go The wrong printer was selected in the software e Inthe Print or Printer Setup dialog box make sure that the HP color LaserJet 2550 series printer is selected as the printer A jam might be present Clear any jams See Clearing jams The printer is on a network and is not receiving a Disconnect the printer from the network and signal attach it directly to a computer using a parallel or USB cable Clear any stopped jobs from the print queue Print a job that you know works Reinstall the printing software The interface cable between the computer or Disconnect and reconnect the interface cable network and the pr
139. inter is not connected properly Resolving problems that did not generate messages 209 Table 6 10 Solving general printing problems continued The printer does not respond when the Print command is selected in the software The interface cable is defective If possible connect the interface cable to another computer or network port and print a job that you know works Try using a different cable If the printer is connected to a computer the Check the printer selection menu in the software for the printer is not configured for the software to make sure it is using the correct printer port port If the computer has more than one port make sure that the printer is associated with the correct one Remove all shared or third party devices Pages print but all colors do not print or the pages are completely blank One of the print cartridges might be low or empty Run an engine test see Functional checks to make sure that all four colors print If not all colors print replace one or more of the print cartridges If the engine test is successful replace the formatter If the printed pages are completely blank the file Check the file to make sure that it does not might have blank pages contain blank pages A print cartridge might be low or empty Check the printer control panel for a Supplies Status message or print a Supplies Status page to see the levels remaining in the print cartridges Replace any prin
140. irements Conforme ala classe B des normes canadiennes de compatibilit lectromagn tiques CEM Korean EMI statement MSA OS BS 22 Oo Ale waSSoe HH da AABN FAASA 32 23 ASO ABS USU 28 Chapter 1 Product information ENWW Finnish laser statement LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP color LaserJet 2550L 2550Ln 2550n laserkirjoitin on kayttajan kannalta turvallinen luokan 1 laserlaite Normaalissa k yt ss kirjoittimen suojakotelointi est lasersateen p syn laitteen ulkopuolelle Laitteen turvallisuusluokka on m ritetty standardin EN60825 1 1994 mukaisesti VAROITUS Laitteen kayttaminen muulla kuin kaytt6ohjeessa mainitulla tavalla saattaa altistaa kayttajan turvallisuusluokan 1 ylitt v lle nakymattomalle lasers teilylle VARNING Om apparaten anv nds p annat s tt an i bruksanvisning specificerats kan anv ndaren uts ttas f r osynlig laserstr lning som verskrider gr nsen f r laserklass 1 HUOLTO HP color LaserJet 2550L 2550Ln 2550n kirjoittimen sisalla ei ole kayttajan huollettavissa olevia kohteita Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu henkil T llaiseksi huoltotoimenpiteeksi ei katsota variainekasetin vaihtamista paperiradan puhdistusta tai muita kayttajan kasikirjassa lueteltuja kayttajan tehtavaksi tarkoitettuja yllapitotoimia jotka voidaan suorittaa ilman erikoisty kaluja VARO Mik li kirjoittimen suojak
141. ited warranty statement Attention light Generally the Attention light blinks when the printer is out of paper when a jam has occurred or when other problems that need attention occur The Attention light is on and one of the Supplies Status lights is blinking the first time a non HP supply is installed Ready light The Ready light is on when the printer is ready to print experiencing no errors that prevent printing and blinks when it is receiving data to be printed Control panel features 35 Go light and Go button When the Go light is on and the Attention light is blinking pressing o Go continues the print job after you load print media for a manual feed or clears some errors e When the Go light is blinking the top cover has been opened and then closed or you have pressed Rotate Carousel Pressing Go returns the printer to the Ready state If you do not press o Go the printer returns to the Ready state on its own When the Go light is off pressing Go prints a Demo page Pressing Go and CanceL Jos simultaneously prints a Configuration page and a Supplies Status page If an HP Jetdirect print server is installed an HP Jetdirect page also prints 36 Chapter 2 Installation and operation ENWW Input trays The HP color LaserJet 2550 series printer comes with one or more input trays See Table 2 1 Input tray configuration for configuration information Figure 2 2 Stand
142. ke sure that you use the correct installation procedure and the correct port setting Does the printer print from the computer Connect the parallel cable or USB cable to the printer and to the computer Use a word processing application to send a print job to the printer fee etn The cable is not connected correctly Reconnect the cable The cable is not within specifications Make sure that the the parallel cable is IEEE 1284B compliant or that the USB cable is USB 2 0 full speed Also make sure that the length of cables is less than 3 meters 118 inches An incorrect printer driver is selected Reset the printer driver Check for the correct port setting Other devices are connected to the parallel port Disconnect the other devices and try to print again Also try connecting directly to the computer or through a powered USB hub 170 Chapter 6 Troubleshooting ENWW Clearing jams CAUTION ENWW Occasionally paper or other print media can become jammed during a print job Causes include the following e Input trays are loaded improperly or are overfilled e Media guides in the input trays are not set correctly e Optional tray 2 or optional tray 3 is removed during a print job e The top cover is opened during a print job e The tabs on the fuser are unlocked or the fuser is not seated correctly e Too many sheets have accumulated in an output area or blocked an output area e The media being used does
143. l d 102 Removal and replacement ccccccceeeecneceeeeeeeeeceneaeceeeeeeeeseceaaeceseeeeeesesecceeeeeseeeesesennisaeeees 103 IMAGING AUN TEE 103 Pant CANO GCS cum ata atada ina 103 Fuser cover and TUSON vcoccoionic liada A 104 Right and left side Covers AU Control panel a aa a a a a a 107 On Off SWO iciocaici EET TRE A E 109 INTOTTACO COVE E E O E E VO Formatter ASSEMDI S iii ia 111 BET TE 116 De controller iii aaa ibid 117 Optional tray 2 250 sheet Tra 118 Carousel engageMent Motor coniccccnnncococononoccnnnnncnn nono nn nono cnn aran n rra 120 NN A Edaina EEA ia 121 Back COVEN EE TOP COVER EEN 123 sie fe ee 125 AW CUCL ANG fan E 127 Laser scanner ASSOMDIY inicio aa 128 Front TEE 130 Density sensor and top of page Sensor coccocccccncoccccccononnnccnnnanononcna nan nnnc nn nana n cnn nn nan nncncnanns 130 E label reader for imaging drum E labels ooocooonnnnccccnonoccccnnnancccnnnannncncnanancccnnnanccnnnnnn 132 Tray 1 lut fi CAE 133 Tray 1 separation pad assembly c oocicccccnnnncccccononcccncnonono conan non n ocn n nano nn nr anna rra 135 Goal ASSEMDIY E 136 Waste toner Sensor 138 Rotary drive assembly iii es oO Top plate uscar tordo 142 Printcartridge carousel voii cdi 145 Aligning the Carousel gears oocccoononoccccnonocccccononncnccnnoncnc canon cnn rrnnn nn r cnn rre 149 Registration roller assembly ooooonnoncccnnnnnoccccnnnnonccccnnnannnc nono nano ncnnnnnnn naaien nn na nannnnnnnnnnd 150 Chapt
144. l feed errors 184 manuals 46 margins envelopes 20 media curl troubleshooting 197 envelopes 20 labels 21 loading tray 1 39 loading tray 2 40 loading tray 3 42 output paths 38 path check 219 selecting 18 skew troubleshooting 197 specifications 17 19 transparencies 22 tray 1 types supported 17 troubleshooting 208 wrinkled troubleshooting 198 media jams See jams memory configuration page printing 225 included 2 partnumbers 239 resetting 221 messages eventlog 226 Low cartridge 64 177 Macintosh 204 printer status lights 182 supplies status lights 177 Windows 204 middle frame assembly diagrams and part numbers 258 model number 7 models trays included 37 models features 2 ENWW motors carousel engagement replacing 120 diagrams 73 fuser replacing 116 print cartridge 93 replacing 139 testing 219 tray2and3 76 MS DOS Command Prompt 223 N Netscape Navigator versions supported 44 networks software for 11 troubleshooting 207 non HP supplies 66 non volatile memory PJL commands 223 resetting 221 NVRAM PJL commands 223 resetting 221 O on off switch 7 on off switch replacing 109 online support 238 operating environment specifications 32 operating environment specifications 16 operating systems supported 9 operations clutches 80 E label 94 engine control system 70 fans 73 image formation process 85 image formation system 84 jam detection 77 motors 73 paper trays 76 pickup and feed system 75 pow
145. lable discharge body static and ground the product chassis before servicing the product Remove the imaging drum see Imaging drum Remove the print cartridges see Print cartridges Unplug the power cord and the interface cable Lift the printer and optional tray 2 off of optional tray 3 if it is installed Before performing service 101 102 Parts removal order Use the following diagram to determine which parts must be removed before removing other parts Imaging drum print cartridges cables power and interface Jetdirect card Fuser cover and fuser Left side cover __ Carousel motor Right side cover Control panel L Interface cover L Formatter cage m Jetdirect Card L Formatter Fuser motor De controller Left side cover Optional tray 2 Front lower cover L Tray 1 __ Back cover _ Top cover Top door L Air duct and fan L Tray 1 separation pad assembly Formatter cage L Gear assembly _ Waste toner sensor Rotary drive assembly Top plate L Print cartridge carousel rotary assembly Laser scanner Front cover m Density sensor t Formatter cage Formatter cage t Optional tray 2 Top of page sensor __ E label reader imaging drum __ Toner catch tray L_ Fuser wrap jam sensor roller Registration roller assembly Toner catch tray Transfer roller plate L Optional tray 2 L Transfer roller L_ Right
146. le 7 13 on page 269 Top plate RG5 6907 000CN Table 7 6 on page 253 269 Waste toner sensor PCA RG5 7607 000CN Table 7 13 on page 269 ENWW Alphabetical parts list 277 Numerical parts list Table 7 15 Numerical parts list Part number Description Table and page Q3702 67901 Formatter HP color LaserJet 2550L printer Table 7 13 on page 269 Q3703 67901 Formatter includes network card HP color Table 7 13 on page 269 LaserJet 2550Ln printer and HP color LaserJet 2550n printer Timing belt Bushing left Bushing right Rubber foot Roller transfer sensor Carousel lock left white Mount terminal Mount antenna contact Guide rotary release Cable guide Fuser duct Spring torsion Roller lower top output bin small Cover fuser motor Holder transfer sensor Flag transfer sensor RFI shied Spring tray 1 flag Guide left paper feed Guide right paper feed Holder fuser connector Insulating sheet Static charge eliminator plate Shaft feed drive Table 7 9 on page 259 RB1 8668 030CN RB2 3043 000CN RB2 3044 000CN RB2 6248 000CN RB2 6297 000CN RB2 7195 000CN RB2 9809 000CN RB2 9850 000CN RB2 9851 000CN RB2 9852 000CN RB2 9903 000CN RB2 9904 000CN RB2 9905 000CN RB2 9909 000CN RB2 9916 000CN RB2 9924 000CN RB2 9925 000CN RB2 9932 000CN RB2 9952 000CN RB2 9954 000CN RB2 9955 000CN RB2 9999 000CN RB3 0006 000CN RB3 0007 000CN RB3 0009 000CN RB3 0010 000
147. le 7 7 Table 7 8 Table 7 9 Table 7 10 Table 7 11 Table 7 12 Table 7 13 Table 7 14 Table 7 15 HP color LaserJet 2550 series printer software oooocococinnnocococncccncnnccnnnncnnnnnos 9 Physical Specific ON siii 15 ee ee e Ur Le EE 15 Electrical specifications ooooocooconcconcnonanoccoccccconcnnnnnncnnnnnonnrnnnnonnnnnnnnccnnnnnnes 15 Environmental Specifications ooooonncinnnnnnnocconocnncnncnncnononcnnnnnn nn nono nncnnnnnn 16 Acoustic emissions HP color LaserJet 2550 Series ooononniinnnninnnninnicccannnno 16 Tray Ee ee Lu Le 17 Optional tray 2 specifications oooooooccconnnnccnnnnncccononcccncnncnnnnnnnonn cnn cnn cnn nnnnnnnnnnno 18 Optional tray 3 specifications oooooocccccnnnnncnnnnncccononcccncnnnnnnnnnnrncnnncnnnnnnnnnnnnnnnno 18 Input tray configuration oooocoonnccccnnoncccnnnoncccnonancnnn non nc cnn non nc nano nn iaeei Seii 37 Life expectancies Of supplies oooooococcoccconoccococccccccncnncnnonnononcnnnnnncnnannn nn nn cnn 51 Basic sequence of operation e O Motors and Tans iia dia sete Sareea e ble 73 Photosensors and ewitches cnn nor rc cnn narrar 79 E e e DE 80 A Aueren ae atin kesh eege ge aes 81 Printed circuit assemblies n ruoista danilo dnd 83 ER nnan 169 Control panel lights legend AAA 176 Supplies Status light MESSAGES ooonnncccinnnnococinnnnoconcnononnonann non nn nar nnnn nc rca 177 Printer status light MESSAGES 0ooooinncccconnncccnnonononcnnnono canon
148. light blinking 178 180 locating 34 on 177 blank pages troubleshooting 210 brake solenoid 139 browser requirements 44 buttons control panel 34 Cc cables connecting 33 Macintosh 215 part numbers 239 troubleshooting 170 calibrating printer 63 Cancel Job button 35 cardstock 17 carousel motor replacing 120 replacing 145 rotating 216 ENWW cartridges carousel replacing 145 carousel rotating 216 high voltage connection points checking 219 life expectancy 51 non HP supplies policy 66 operations 93 partnumbers 239 recycling 25 65 refilled 25 replacing 103 status lights 34 177 status page printing 226 status checking 64 storage specifications 16 storing 65 toner washing off clothing 171 warranty 24 characters troubleshooting 193 196 checks continuous self test 218 engine 218 high voltage power supply 219 paper path 219 Chooser troubleshooting 213 classes 238 cleaning operations image formation 90 92 cleaning page 61 clutches 76 80 cold reset 221 color troubleshooting 200 commands PJL 223 configuration page printing 225 troubleshooting 169 configurations printer 2 connecting cables 33 connectors locating 230 consumables See supplies continuous self test 218 control panel lights and buttons description 34 printer status lights 182 replacing 107 supplies status lights 177 supply status checking 65 troubleshooting 169 Index 285 country region of origin 7 Courier font troubleshooting
149. lor on transparencies Transparencies that are used in the printer must be able to withstand 210 C 410 F which is the printer fusing temperature CAUTION To avoid damage to the printer use only transparencies that are recommended for use in laser printers For more information see Media specifications 22 Chapter 1 Product information ENWW Hewlett Packard limited warranty statement HP PRODUCT DURATION OF LIMITED WARRANTY HP color LaserJet 2550L 2550Ln 2550n 1 year Return to Authorized Service Center HP warrants to you the end user customer that HP hardware and accessories will be free from defects in materials and workmanship after the date of purchase for the period specified above If HP receives notice of such defects during the warranty period HP will at its option either repair or replace products which prove to be defective Replacement products may be either new or equivalent in performance to new HP warrants to you that HP software will not fail to execute its programming instructions after the date of purchase for the period specified above due to defects in material and workmanship when properly installed and used If HP receives notice of such defects during the warranty period HP will replace software which does not execute its programming instructions due to such defects HP does not warrant that the operation of HP products will be uninterrupted or error free If HP is unable within a reasonable time to
150. lure presence level life check check period check period y Image cartridge presence life waste toner full check y Laser scanner motor initial drive Y Laser scanner motor initial drive check y Maximum image density control D max y Halftone calibration detection control D half Image stabilization SEENEN A Y_ calibration control Standby Figure 4 3 Power on sequence 72 Chapter 4 Theory of operation ENWW Motors and fans Figure 4 4 Motors and fans Table 4 2 Motors and fans Reference Description 1 Engaging motor Developing rotary motor in ENWW Engine control system 73 Laser scanner system The laser scanner system receives video signals from the dc controller and then it converts the signals into latent images on the photosensitive drum The dc controller controls the laser scanner De controller SCANNER MOTOR CONTROL signal LASER CONTROL signal VIDEO signals Four sided mirror Scanner Focus lenses motor Reflective mirror BD circuit Laser driver Figure 4 5 Laser scanner system 74 Chapter 4 Theory of operation ENWW Pickup and feed system ENWW The pickup and feed system consists of several types of feed rollers and sensors The dc controller drives the paper and feed system by controlling two motors two clutches and the sol
151. m in cold water Hot water sets toner into fabric 1 Complete one of these steps elf the media is not almost completely visible from the top output bin proceed to step 2 e If the media is almost completely visible pull it carefully out of the printer and proceed to step 9 3 4 Ifthe jam is too far into the printer to remove turn off the printer and disconnect the power cable CAUTION Always turn off the printer and disconnect the power cable before you remove the fuser 174 Chapter 6 Troubleshooting ENWW 5 Rotate the locks on the fuser to the unlocked position WARNING The parts on the internal surface of the fuser are very hot To avoid burning yourself do not touch those parts 7 Press the green fuser release levers to separate the fuser rollers and then carefully remove any media from inside the fuser 8 Using both hands slowly and steadily remove any media from inside the printer Then carefully reinsert the fuser and secure the locks 9 Reconnect the power cable and turn on the printer 10 Open the top cover close it again and then press Go if the Go light is flashing If the Attention light is still blinking then there is another jam See To clear jams from inside the printer and To clear jams from input areas ENWW Clearing jams 175 Control panel light messages Note For non error status messages see Supplies Status lights and Printer Status lights Each
152. m is still not resolved see Solving general printing problems Checking the network It is recommended that you use the HP color LaserJet 2550 series printer CD ROM to install and set up the printer on a network Follow these steps to see if the problem is caused by the network e When the Configuration page printed an HP Jetdirect configuration page should have printed if the printer is network enabled If these pages do not print in your language see Troubleshooting tools Verify that all network settings are correctly configured e Contact the network administrator for assistance Solving general printing problems In addition to the problems listed in this section see Solving common Macintosh problems if you are using a Macintosh computer and see Solving PostScript PS errors if you are using several printer languages Table 6 10 Solving general printing problems The print job is extremely slow The job might be very complex for example if it Wait for the job to print contains graphics Reduce the complexity of the page or try adjusting the print quality settings If this problem occurs frequently add memory to the printer The maximum speed is 16 ppm in black and Wait for the print job to finish 4 ppm in color and cannot be exceeded even when more memory is added Printing speeds might be automatically reduced Wait for the print job to finish when printing special size media Resolving probl
153. m negative potential to the photosensitive drum Primary charging roller Photosensitive drum Step 1 primary charging Step 2 laser beam exposure The laser beam scans the photosensitive drum to neutralize negative charges on parts of the drum An electrostatic latent image is formed on the drum where negative charges were neutralized Laser beam Unexposed Exposed areas areas Step 2 laser beam exposure Developing stage The developing cylinder comes in contact with the photosensitive drum to deposit toner onto the electrostatic latent image 86 Chapter 4 Theory of operation ENWW Note Figure 4 18 Figure 4 19 ENWW The charges on the exposed area on the drum are shown as positive in Figure 4 18 Developing block The charges are actually negative but they are more positive than the charges on the developing cylinder Photosensitive Stirrer Developing A cylinder L Z Dc bias a Dc bias The ee Developing block Step 3 auxiliary developing The dc bias applied to the blade imports a uniform negative potential to the toner Step 4 developing Toner acquires a negative charge through friction from the developing cylinder and the blade When the negatively charged toner comes in contact with the drum the toner adheres to the electrostatic latent image The image on the drum becomes visible because of the toner V J Drum surface potential exposed area
154. mage defects to help solve image quality problems Place the ruler next to the first occurrence of the defect on the page Find the distance between identical defects and see Table 6 14 Repetitive image defects to identify the component that is causing the defect Table 6 14 Repetitive image defects Troubleshooting tools 227 harts iming c General t uoleredas Jasn4 Zz enyebau seig op Burueajo a 11 97 am sod seig op Bulueajo gLI SZ oe Bujuea a g 11193 r9 moqy enjebau seig op Bujueajo 9 U eeng E Lo moqy enysod seg op Bujueaja 911 Aerm 23 OH ger go nay 219 yano BuiBebue Jajjoy LZ eayeGeu sg op sajsues repuosas OZ Lt anoqy E enyisod seig op 1ajsues repuosas 6L enyebau seq op Jajsuea Avewid 8L eaysod seig op uaysuey Arewid Z Sq serq op Buidojanag lot SSS le gt seiq op Buidojanap Arelixny let ze moqy t noqy See ZC moqy ze moqy serq op Buibreyo Aeuud IL seg oe BuiBreyo Aeuud e le LC Wm Wm Wm o ginoqy H ze noqy Vote selon Jeune Vote asIMyDOI9 JAJUNOD SOZWd 10 0W afpuue jud Z romogy uonejos aSIMY209 Veto eso Lee Lowmneay le De pa Z o me 9 fen eme
155. motor see Rotary drive assembly The Attention and Ready lights are on Table 6 9 Additional error messages Control panel message Event Description Recommended action log error message No light pattern Yellow density out of range Turn the printer off and then Magenta density out of range Recon If the problem persists replace the appropriate sensor Cyan density out of range Black density out of range Density sensor error Top of page sensor error ENWW Control panel light messages 189 Solving image quality problems If your document is printing but the quality is not what you expected start by using the print quality checklist Print quality checklist Use the following checklist to solve general print quality problems 1 Check the printer driver to make sure that you are using the best available print quality option or return to the default settings See the HP Color LaserJet 2550 Series Printer User Guide for more information about print quality options 2 Make sure that the paper or print media you are using meets specifications See the HP Color LaserJet 2550 Series Printer User Guide for more information Generally smoother paper provides better results 3 If you are using a special print media such as labels transparencies or letterhead make sure that you selected the correct media type see the Paper tab in the printer driver See the HP Color LaserJet 2550 Series Printer User Guide for
156. mpatible with older similar printer models such as the HP color LaserJet 1500 series printer or the HP color LaserJet 2500 series printer For longer supplies life you can order extended life replacement cyan magenta or yellow print cartridges for the HP color LaserJet 2550L printer that last an average of 4 000 pages at 5 coverage Checking and ordering supplies You can check the supplies status by using the printer control panel printing a Supplies Status page viewing the HP LaserJet Toolbox or viewing HP Web Jetadmin Hewlett Packard recommends that you place an order for a replacement print cartridge when you first receive the Low message for a print cartridge The Low message indicates that approximately two weeks of life remain When you use a new authentic HP print cartridge or imaging drum you can obtain the following types of supplies information e amount of cartridge or drum life remaining e estimated number of pages that can be printed e number of pages printed e other supplies information If the printer is connected to the network you can set the HP LaserJet Toolbox to notify you by e mail when a print cartridge is low or the imaging drum is near the end of its useful life If the printer is directly connected to a computer you can set the HP LaserJet Toolbox to notify you when supplies are low 64 Chapter 3 Maintenance ENWW CAUTION ENWW To check status and order supplies using the control panel Do one o
157. n page 247 Dc Controller RG5 7605 000CN Table 7 6 on page 253 Dc controller RG5 7605 000CN Table 7 13 on page 269 ENWW Alphabetical parts list 271 Table 7 14 Alphabetical parts list continued Density sensor PCA RH7 7146 000CN Table 7 13 on page 269 Flag transfer sensor RB2 9925 000CN Table 7 9 on page 260 Flag tray 1 sensor RB3 0111 000CN Table 7 4 on page 247 Formatter includes network card HP color Q3703 67901 Table 7 13 on page LaserJet 2550Ln printer and HP color LaserJet 269 2550n printer Formatter HP color LaserJet 2550L printer Q3702 67901 Table 7 13 on page 269 272 Chapter 7 Parts and diagrams ENWW Table 7 14 Alphabetical parts list continued Description Part number Table and page High voltage transformer PCA RG5 7606 000CN Table 7 11 on page 265 High voltage transformer PCA RG5 7606 000CN Table 7 13 on page 269 Hinge left tray 1 RB9 0889 000CN Table 7 4 on page 247 Hinge right tray 1 RB9 0890 000CN Table 7 4 on page 247 Holder fuser connector RB3 0006 000CN Table 7 11 on page 265 Holder high voltage RB3 0062 000CN Table 7 11 on page 265 Holder interlock switch RB3 0023 000CN Table 7 6 on page 253 Holder transfer sensor RB2 9924 000CN Table 7 9 on page 260 Insulating sheet RB3 1110 000CN Table 7 9 on page 259 Insulating sheet RB3 0007 000CN Table 7 11 on page Label caution RS6 8668 000CN Table 7 5 on page 251 Label image cartridge RS6 8662 000CN Table 7 4 on page 248 L
158. n page 255 Right side plate rear assembly Table 7 7 on page 255 Rod on off switch Table 7 3 on page 245 Roller assembly upper top output bin Table 7 5 on page 251 Roller cover Table 7 4 on page 247 274 Chapter 7 Parts and diagrams ENWW Table 7 14 Alphabetical parts list continued Roller belt Table 7 9 on page 259 Roller lower top output bin Table 7 8 on page 257 Roller lower top output bin small Table 7 8 on page 257 Roller small top output bin Table 7 5 on page 251 Roller transfer Table 7 9 on page 260 Roller transfer sensor Table 7 9 on page 260 Rotary carousel assembly RG5 7587 000CN Table 7 10 on page Rotary assembly RG5 7587 000CN Table 7 6 on page 253 Rotary drive assembly RG5 7592 000CN Table 7 6 on page 253 Rotary drive assembly RG5 7592 000CN Table 7 12 on page Rotary plate assembly left RG5 6942 000CN Table 7 10 on page Rotary pressure assembly RG5 7589 000CN Table 7 10 on page 263 Rubber foot Table 7 9 on page 259 Screw M3x10 Table 7 5 on page 251 Screw M3x6 Table 7 6 on page 253 Screw M3x8 Table 7 5 on page 251 Screw M3x8 XA9 1355 000CN Table 7 11 on page Screw M3x8 XA9 1291 000CN Table 7 11 on page Screw M4x10 Table 7 4 on page 247 Screw M4x10 Table 7 5 on page 251 Screw M4x10 Table 7 8 on page 257 Screw M4x10 Table 7 9 on page 259 Screw RS M3x6 Table 7 5 on page 251 Screw RS M3x6 Table 7 8 on page 257 Screw RS M3x6 Table 7 9 on page 260 Screw RS M3x8 Table 7 3 on page 245
159. ng RS Gi POZINd Jojow Bubebuz LL e618 piouayis seddoys Geen Budojanag OL Wm E ed SEH EL nogy EL moay EL mom gt P s o ogy gt 9 moqy gt e Le Eb nog CL mee EL re RN WR WO WO WR ro inoqy GOZO Jojow reos Burdojenag 6 1719 yano vogensibay 8 2618 prouejos dn yoid Aew Z t ZOZINd 1030W Jasny 9 8 61 moqy y LOZWOG oo urew S L2ZN4 uey Buyjoog dOL euBis snouosyouss oan E LH 4ayeay uasny Z mu Jauueag b spuoxes yun acuenbas NO Jamo poued Liv 101 yeyo ujui e ENWW General timing chart WAIT period 228 Chapter 6 Troubleshooting Figure 6 6 be moqy seq uonesedas Jasny enyebau seg op Bulueaja gLI 9z aanisod seiq op Bulueajo au sz seq oe Bulueajo aLI yz enyeBeu seq op Bujueajo g L lex ez a AA a E P ennisod seig op Bulueajo guy eeng zz LE moqy ali ze mody mI WW Les pe kd GC 219 yamjo BulSeBua ag Lz Lo mody t e moqy moqy S o moqy AAA HR ennebau seg op saysuen Arepuosag Joe ze moqy Elanoqy noqy y yA zz moqy o g moqy ennisod seiq op seysuen repuooas 6l SL inoqy
160. ng image quality problems color print jobs 200 Resolving problems that generated MESSAGES ooomccccinoccccnonocccccnoncnccnnoncnc canon nn r rana nara nara 204 Messages for both Windows and Macintosh oococccnnnnccccnnnnocccccnnnaonccncnanannnccnnnnnnnccnnnnnn 204 Messages for Windows Only oocccoonnccccnnnnnccccnnnonccnno nono ca conan ikki rca rr 204 Resolving problems that did not generate MESSAGES oocoociciccococcccccocconcnnnonannncnnc nana nnnnr nana 206 Troubleshooting CheckliS E EE 206 Checking the Network ooiccccinnnncccccnnnccccccno nan cc cinco narco cnn nan rrcn nana 207 Solving general printing problems cconnnnnccnnnnncccccnnnonccnnannorn cono narnia rca 207 Solving PostScript PS CrrOrs cnnnnnccnnnnncccnnnonocnnnnnnrnnnnonnn cnn nn rra carr nnn anna r nana nn rra rn 212 Solving common Macintosh problems A 213 Manually rotating the print cartridge carousel oooonnnccccnnnncccccnnnoncccnnnnoncccnonannncnnnannnccnnnnns 216 Functional CHECKS sico daria ai 218 See 218 High voltage power supply check oocccccciococcccccoconcccconanoncncnnnanonoccnnnanonccnn naar nncnnnnannncncnnns 219 Paper path ee 219 Serice mode lee 221 Cold WE 221 EE RTE 221 Error NEP OM E 222 Super NVRAM Immttalzaton cece eee eeeeceaeeaeeeeeeeeeesesceaaeaeeeeeeeeeeeeseeenenaaees 222 Network Card Cold reseler ea dir deena dati iio 222 E Luie Ne lu EE 223 TFOUDIESMOOUMG hee EE 225 Demo PAG E 225 Configurati n PAGE E 225 Supplies Status PA
161. ngine control system 70 operations 75 pickup delay jams 77 pickup rollers life expectancies 51 testing 219 tray 1 replacing 52 tray 2 replacing 162 tray 3 replacing 163 pickup stationary jams 77 PJL commands 223 platforms supported 9 ports cables 239 connectingto 33 locating 7 Macintosh issues 215 troubleshooting 170 types included 5 postscript emulator features 5 operating systems supported 9 PostScript errors 212 power requirements 15 switch 7 troubleshooting 169 206 power supplies base assembly diagrams and part numbers 264 high voltage replacing 158 locating 70 low voltage replacing 159 operations 72 sub high voltage replacing 157 power switch replacing 109 PPDs Macintosh 12 primary charging stage image formation 85 primary transfer roller 88 print cartridges carousel replacing 145 carousel rotating 216 high voltage connection points checking 219 life expectancy 51 non HP supplies policy 66 operations 93 partnumbers 239 recycling 25 65 refilled 25 replacing 103 status lights 34 177 290 Index status page printing 226 status checking 64 storage specifications 16 storing 65 toner washing off clothing 171 warranty 24 print quality color troubleshooting 200 specifications 4 troubleshooting 190 199 PRINT sequence 71 printed circuit assemblies PCAs 82 268 printer drivers downloading 10 Macintosh 12 operating systems supported 9 uninstalling 13 Windows features 11 Printer Job Languag
162. nnnnnnnn nano nn cnn naar a ncnnnnnns 111 Removing the formatter cage 1 Of 2 112 Removing the formatter cage 2 Of 2 113 xi xii Figure 5 10 Figure 5 11 Figure 5 12 Figure 5 13 Figure 5 14 Figure 5 15 Figure 5 16 Figure 5 17 Figure 5 18 Figure 5 19 Figure 5 20 Figure 5 21 Figure 5 22 Figure 5 23 Figure 5 24 Figure 5 25 Figure 5 26 Figure 5 27 Figure 5 28 Figure 5 29 Figure 5 30 Figure 5 31 Figure 5 32 Figure 5 33 Figure 5 34 Figure 5 35 Figure 5 36 Figure 5 37 Figure 5 38 Figure 5 39 Figure 5 40 Figure 5 41 Figure 5 42 Figure 5 43 Figure 5 44 Figure 5 45 Figure 5 46 Figure 5 47 Figure 5 48 Figure 5 49 Figure 5 50 Figure 5 51 Figure 5 52 Figure 5 53 Figure 5 54 Figure 5 55 Figure 5 56 Figure 5 57 Figure 5 58 Figure 5 59 Figure 5 60 Figure 5 61 Figure 5 62 Figure 5 63 Figure 5 64 Figure 5 65 Removing the formatter 1 Of 21 114 Removing the formatter 2 Of 21 115 Removing the network Card 116 Removing the fuser motor cece teeter eee etieee eee teeeeeeeteeeeeenaeeeenens 117 Removing the de Controller A 118 Removing optional tray 2 1 Of 2 119 Removing optional tray 2 2 Of 2 120 Removing the carousel engagement MOtOF 0 0 eect eeeeeteeeeeeeenteeeeteeeaees 121 Removing the front lower COVED oocoonocccccnnncocccccnnnonncncnonannnccnn nana nccnnnnnancncnnnns 122 Removing the back Cover 123 Removing the top cover 1 Of 2 124
163. nonccnnnnncnn anar men nnnnnn nn nnnn nn nn nn ranma 50 User replaceable parts suo as aa 52 Replacing the tray 1 pickup roller and Separation Dad 52 Replacing the separation pad in optional tray 2 or in optional tray 3 57 Cleaning the printer usina iia 61 Cleaning the Printer ronisin iaa a EA EE dek dala eeuaries 61 Calibrating the prater ccoo tii ries li A ageet ENEE 63 To calibrate the printer at the printer eccesscceececeeeeeeeeceeeeneeeeeeeeeeeesecennnaeeeeeeeeeeeeeees 63 To calibrate the printer from the HP LaserJet Toolbox oooooccccononcocconccnccnoncnnccnnccnnnnninannns 63 Managing Bee 64 Supplies life iia 64 Checking and ordering supplies oooononccccinonicicnnonnccnncnccrccnn rre 64 SLOKING EE 65 Replacing and recycling supplies ooooococnnnnncccinnnnccccnnnoncccnnnorrc cnn nc cnn cnn rr 65 HP policy for eu el GETT EE 66 HP fraud A 66 Chapter contents 49 Life expectancies of supplies Inspect supplies when you service the printer Replace supplies as needed based on failure or wear rather than on usage The following table lists approximate schedules for replacing supplies 50 Chapter 3 Maintenance ENWW Table 3 1 Life expectancies of supplies Description Part number Estimated life in number of pages at 5 percent coverage Print cartridge black user Q3960 67901 EST Q3960 67902 EMEA Print cartridge cyan user Q3971 67901 EE Q3971 67902 EMEA Print cartridge cyan user Q396
164. not meet HP specifications See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e The environment in which the paper was stored is too humid or too dry See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e Non HP supplies are installed in the printer Where to look for jams Jams can occur in these locations e Inside the printer See To clear jams from inside the printer e In input areas See To clear jams from input areas e In output areas See To clear jams from output areas Find and remove the jam by using the instructions on the following pages If the location of the jam is not obvious look first inside the printer Loose toner might remain in the printer after a jam This problem should resolve itself after a few sheets have been printed See Loose toner To clear jams from inside the printer Jams in this area might result in loose toner on the page If you get toner on your clothes or hands wash them in cold water Hot water sets toner into fabric 1 Open the top cover Clearing jams 171 2 Remove the imaging drum by pushing it away from you and lifting it out of the printer Note You cannot reach jams by removing the print cartridges 3 Complete one of these steps e Ifthe leading edge or the trailing edge of the print media is visible carefully pull the sheet out of the printer
165. nt ttt EE EnES EENS EEE EEEn Ennan nE EnEn nn 7 elle lee nn CET 9 Software and supported operating systems oooocoocccoccccccccccncccncnnnnnnnnnnonncnnnnnnnnnnnnannnnnnnnnnno 9 SOWAS UPS 1d ii 10 Software for WiINGOWS oooooococcccconcccnccononnncnnncnnnnnonnnnnnnnnnnnnnn nn rn nn nn nnnn nn nrn nr ran nnn nr nn nrnnrnnnnnnnnnns 11 Software Tor Macintosh evitando daban crac aaa iZ Uninstalling the printing software onccconnnnccccnnnnoccccccnnnannnc cn eee eee ninni rca r cnn rr cnn rca 13 A aaa a aaa aaa aa aaaea A A E e EEA 15 Media specifications Al Supported media weights and sizes cecceceeceeeeeeeeenee cece cece eececaeeeeeeseesenecaeeeeeeeeeneees 17 General guidelines asenn EE ET 18 Paper and printmedia ainia ld din Ed 19 Printing and storage environment occoocccccnnoconncccnnnoncnnnnononcnnnnn anna conc nnnnn cn cc nn ERRANEN EEEN 19 EnVelODeS said lidad 20 Labels iii tada 21 Transparencies astuta titi dad ibid calida 22 Hewlett Packard limited warranty statement ooooonnnccccccnnnoncccccnnconcnccnanonnnnnncnannnn nn rnnnnn nc rca 23 Limited warranty for the print cartridges and imaging drum oocccconcocccoccconanonannnncnanannnna ro nannnnn 24 Rrpt Gartodoe jplorretion sde SCENE BEE SES sonas ER 25 EEN Reine lu EE 25 HP LaserJet printing supplies ooooooocccccnnncocoooccccnccoconononccnnnoncnnnnnnnonnnnnnnnnnnnnn cnn cn nn nana nnnnnos 25 HP Printing Supplies Returns and Recycling Program miormatton 25 Regulator
166. numbers 266 replacing 139 Rotate Carousel button locating 35 36 using 216 S screwdrivers 100 screws replacing 99 secondary transfer roller 88 sensors density replacing 130 diagrams 78 fuser wrap replacing 161 jam detection 77 paper top replacing 160 pickup and feed system 75 top of page replacing 130 tray2and3 76 waste toner replacing 138 separation pads life expectancies 51 tray 1 replacing 52 135 tray 2 or 3 replacing 57 tray 2 replacing 57 separation stage image formation 89 serial number 7 setting up printer 32 ENWW settings changing 10 configuration page printing 225 restoring factory defaults 221 side covers 106 size printer 15 skew troubleshooting 197 slow printing troubleshooting 207 smeared toner troubleshooting 194 software downloading 10 Macintosh features 12 operating systems supported 9 Toolbox 44 troubleshooting 170 uninstalling 13 Windows features 11 solenoids diagrams 80 testing 219 tray 1 75 tray2and3 76 space requirements 32 special media envelopes 20 labels 21 loading 39 output paths 38 specifications 17 transparencies 22 specifications envelopes 20 environmental 16 32 labels 21 media 17 model and serial number 7 output paths 38 paper 19 printer 15 printer features 4 transparencies 22 trays media supported 17 speed specifications 4 troubleshooting 207 static precautions 99 stationary jams 77 status non HP supplies 66 page printing 226 supplies ch
167. o Ready and the MS DOS window displays the command prompt gt A To return to Windows type exit and then press Enter 5 Print a Configuration page to verify that the printer information is restored 224 Chapter 6 Troubleshooting ENWW Troubleshooting tools ENWW Information pages repetitive defect measurements timing charts and cable connection diagrams are useful tools in solving printer problems Demo page To print the Demo page press Ka Go when the printer is Ready Ready light on and is not printing You can also view this page from the HP LaserJet Toolbox Configuration page The Configuration page lists current settings and properties of the printer You can print a Configuration page at the printer control panel or from the HP LaserJet Toolbox To print a configuration page To print the Configuration page from the printer press Go and Cancel Job simultaneously The Supplies Status page also prints If you have an HP Jetdirect print server card installed the HP Jetdirect page listing the HP Jetdirect information also prints has pany E EE Ir le 1 Product Information This section contains basic information about the printer such as the product name and serial number 2 Memory This section lists memory related information such as the total memory that is installed 3 Paper Settings This section lists information about the media type for each tray and abou
168. on the front Marks repeatedly appear on the printed side of the page at even intervals AaBbCc AQBbCc _ AaBbc AOBbC AaBLbC e Inthe printer driver select the Paper tab and set Type is to match the type of paper on which you are printing Print speed might be slower if you are using heavy paper e Clean the printer Open the HP LaserJet Toolbox to use the cleaning page See To use a cleaning page for details e Use the tools on the Troubleshooting tab of the HP LaserJet Toolbox to correct the problem e The imaging drum might be defective Replace the imaging drum e The fuser or imaging drum might be damaged e One of the print cartridges might be defective Examine the print cartridges and replace as needed e Ifthe problem is not resolved see lf the problem is not resolved Solving image quality problems 195 Repetitive defects on the back Marks repeatedly appear on the unprinted side of the page at even intervals By L i L i e Internal parts might have toner on them The problem will likely correct itself after a few more pages e Clean the printer Open the HP LaserJet Toolbox to use the cleaning page See To use a cleaning page for details e The fuser or imaging drum might be damaged e Ifthe problem is not resolved see lf the problem is not resolved Misformed characters AadaBbeos AaBbces AGBP AaBbes AGBP AGBP e f characters are improperly fo
169. ong garbled or incomplete If the printer is connected to a computer the operating system is malfunctioning Font DIMM might be selected but the font DIMM might not be physically installed in the printer This issue only applies when an Asian language font DIMM is installed Solving PostScript PS errors Check the operating system Note This method works only with Windows 98 NT 4 0 and 2000 operating systems and the computer must be connected to a parallel cable If you do not know how to use this method see the documentation that came with the computer Restart the computer When it beeps during startup press F5 and select Command Prompt Only At the C prompt on the computer type Dir lt LPT1 and then press Enter This assumes that the printer is connected to LPT1 If the Go light comes on at the printer press Go to print and eject the page If the page prints correctly then the operating system is malfunctioning In the settings for this printer clear the Font DIMM check box on the Configure tab if no font DIMM is installed in the printer Select the Font DIMM check box only if the font DIMM is physically installed in the printer If you think that the font DIMM is installed make sure that it is installed correctly The following situations are specific to the PS language and might occur when several printer languages are being used To receive a printed or an onscreen message when PS errors
170. ort process The printer prints an error report Super NVRAM initialization Use the following steps to perform a super NVRAM initialization 1 Turn off the printer 2 Press and hold a Go 3 Turn the printer on and continue to hold Go for at least 50 seconds S Release e Go Note The Ready light turns on during a super NVRAM initialization Network card cold reset Use the following steps to perform a network card cold reset 1 Make sure that the printer is in the Ready state Gas 2 Press Rotate Carousel and O Cancel Job simultaneously Note There is no visual feedback from a network card cold reset 222 Chapter 6 Troubleshooting ENWW Note ENWW Using PJL commands PJL commands are useful when you have performed an NVRAM initialization or replaced the formatter After you perform an NVRAM initialization restore the serial number page counts color page counts and formatter number Use the MS DOS Editor to create a file or files to send directly to the printer to restore printer data To send PJL commands directly to the printer the printer must be directly connected to the computer using an IEEE 1284 compliant parallel cable PJL commands cannot be sent to the printer by using a USB or a network connection Use the following PJL commands to restore the printer information to the new formatter ESC 12345X PJL SET SERVICEMODE HPBOISEID PJL DEFAULT SERIALNUMBER
171. ory expansion Energy savings Economical printing Accessibility Chapter 1 Product information Accepts an optional HP Jetdirect external print server HP color LaserJet 2550L printer The HP color LaserJet 2550Ln and 2550n printers include an HP Jetdirect internal print server All common network protocols such as Ethernet Token Ring and LocalTalk are available by using an optional HP Jetdirect external print server The 2550Ln and 2550n models include an HP Jetdirect internal print server The printer comes with 64 MB of memory and can be expanded to 192 MB by using the DIMM slot Most documents can be printed with the standard amount of printer memory through the aid of Memory Enhancement technology MEt MEt automatically compresses data and almost doubles the printer memory and accommodating more complex printing with available memory The printer automatically conserves electricity by substantially reducing power consumption when it is not printing As an ENERGY STARO partner Hewlett Packard Company has determined that this product meets ENERGY STAR guidelines for energy efficiency ENERGY STAR is a U S registered service mark of the United States Environmental Protection Agency N up printing printing more than one page on a sheet and two sided printing using manual duplexing saves paper See To use a cleaning page and Interface cover A Supplies Status page with print cartridge and imaging d
172. otelo avataan olet alttiina nakymatt malle lasers teilylle laitteen ollessa toiminnassa l katso s teeseen VARNING Om laserprinterns skyddsh lje ppnas d apparaten r i funktion uts ttas anv ndaren f r osynlig laserstr lning Betrakta ej str len Tiedot laitteessa k ytett v n laserdiodin s teilyominaisuuksista Aallonpituus 770 800 nm Teho 5 mW Luokan 3B laser ENWW Safety statements 29 30 Chapter 1 Product information ENWW Installation and operation Chapter contents ENWW Ee We ET 31 Operating SMVIFOMMENT TEE 32 Interacts POMS uscar dais 33 Control panel features cceceeccccceceeeeeeseneee cece ee eaceeeaeeeceeeeeeegseeaaeaeceeeeeeageeaeeeeeeeeeseseeeeeeeetees 34 Understanding Supplies Status 0 ccececcececcccee cece eeeeeceeeaeceeeeeeeseceaaaeaeeeeeeeeeesecsnaeeeeees 34 Understanding Printer Status ooooncoconnnnccccnnnocccccnnnaonnccnnnnannccnn nan nn cc conan nc nc nan nn nn AREATA Ra 35 pU IY CAP q ceuceegsa ue didd exetdded oudbed O A ees 37 Printer output paths ccc csccceaccanscausscanncineaedccascnsdedccaunounds dnnnaeteadenadguandannnduadiccad dins adidas ii 38 TOP gellt D l ET 38 Rear output ele e 38 Loading TEE 39 LOAGING TAY EE 39 Loading optional tray 2 iii li hese tbeetaue needa N a AAEE etait 40 Loading optional Tay EE 42 HP LaserJet ToolboX wiscissncecaasicdcessadincnantetanuan deefe a aa e eeh sde 44 Supported operating SYSteMS crete ee eeeeeeaeeeeeeeescaeeeeee
173. ou insert a genuine HP supply that has reached the low state from another HP printer the printer identifies the supply as non HP Simply return the supply to the original printer to reactivate HP features and functionality Resetting the printer for non HP supplies When you install a non HP print cartridge or imaging drum the light next to the print cartridge or imaging drum you replaced blinks and the Attention light is on In order to print with this supply you must press Cancel Job the first time you install this non HP supply The status lights will not indicate when this type of supply is low or empty The printer will not stop printing when a non HP supply is empty Printer damage can occur if the printer attempts to print with an empty print cartridge or imaging drum See Uninstalling the printing software HP fraud hotline Call the HP fraud hotline if the supplies status lights indicate that the print cartridge or imaging drum is not an HP product and you think that it is genuine Hewlett Packard will help determine if the product is genuine and take steps to resolve the problem Your print cartridge or imaging drum might not be a genuine HP product if you notice the following issues e You are experiencing a large number of problems with the print cartridge or imaging drum e The print cartridge or imaging drum does not look like an HP product usually does for example the pull tab or the box is different In the
174. out 1 on the sensor cover to release the cover and then lift the cover up and away from the printer Figure 5 28 Removing the density sensor cover 3 Unplug one connector callout 2 Remove the two screws callout 3 4 5 Lift the density sensor straight up to remove it from the printer 6 Unplug one connector callout 4 from the top of page sensor 7 Remove one screw callout 5 and then lift the top of page sensor straight up and away from the printer Figure 5 29 Removing the density sensor ENWW Removal and replacement 131 E label reader for imaging drum E labels 1 Remove the following covers and assembly e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Front cover see Front cover 2 Use the small flatolade screwdriver to lift two tabs callout 1 one on each side of the E label reader housing 3 Slide the E label reader off of its rails Figure 5 30 Removing the E label reader 1 of 2 132 Chapter 5 Removal and replacement ENWW Note Figure 5 31 ENWW 4 Unplug the E label reader connector callout 2 from the dc controller Examine the cable routing as you lift the E label reader from the printer LO Removing the E label reader 2 of 2 Tray 1 multipurpose tray Remove the following covers e Right and left side covers see Right and left side covers
175. ow voltage PCA 110 127 V RH3 2254 000CN Table 7 11 on page 265 ENWW Alphabetical parts list 273 N o al Table 7 14 Alphabetical parts list continued Description Table and page Low voltage PCA 110 127 V RH3 2254 000CN Table 7 13 on page 269 Low voltage PCA 220 240 V RH3 2255 000CN Table 7 11 on page 265 Low voltage PCA 220 240 V RH3 2255 000CN Table 7 13 on page 269 Main drive assembly RG5 7579 000CN Table 7 5 on page 251 Main drive assembly RG5 7579 000CN Table 7 6 on page 253 Main drive assembly RG5 7579 000CN Table 7 7 on page 255 Motor DCM703 RG5 7593 000CN Table 7 12 on page 267 Motor PM705 RH7 1535 000CN Table 7 12 on page N o a Motor dc 24 V RH7 1613 000CN Table 7 5 on page 251 Motor dc 24 V Table 7 8 on page 257 Mount antenna contact Table 7 9 on page 260 Mount terminal Table 7 9 on page 260 Pad light blocking Table 7 4 on page 248 Pickup roller tray 1 Table 7 4 on page 247 Plate swing shaft grounding Table 7 5 on page 251 Pulley Table 7 9 on page 259 Pulley Table 7 9 on page 260 Rack RB3 0090 000CN Table 7 7 on page 255 Registration roller assembly RG5 6939 000CN Table 7 9 on page 259 Registration sensor RG5 6967 000CN Table 7 9 on page 260 Registration shutter assembly RG5 6940 000CN Table 7 9 on page 259 Registration sensor PCA RG5 6967 000CN Table 7 13 on page 269 Resistor Table 7 9 on page 260 RFI shield Table 7 5 on page 251 Right side plate front assembly Table 7 7 o
176. part numbers printer 251 Internet Explorer versions supported 44 INTR initial rotation sequence 71 ITB cleaning operations 84 90 92 Index 287 J jams causes of 171 detection operations 77 input clearing 172 internal clearing 171 locations 171 output clearing 174 Jetadmin operating systems supported 9 using 11 K keys control panel 34 L labels loading 39 output paths 38 specifications 17 21 languages printer 5 laser beam operations 86 laser safety statements 28 laser scanner engine control system 70 operations 74 replacing 128 LaserWriter 8 driver 12 latent image formation 74 84 left side cover replacing 106 life expectancies recycling used print cartridges 25 supplies 50 light print troubleshooting 192 lights control panel locating 34 printer status 182 supplies status 177 troubleshooting 169 Limit Check Error 204 lines troubleshooting 193 LINUX support 9 loading media tray 1 39 tray 2 40 tray3 42 loose toner troubleshooting 195 Low cartridge message 64 177 low voltage power supply locating 70 replacing 159 troubleshooting 206 LSTR last rotation sequence 71 288 Index M Macintosh error messages 204 213 features supported 9 software features 12 uninstalling software 14 Magenta print cartridge light blinking 179 181 locating 34 on 177 mailing labels loading 39 output paths 38 specifications 17 21 main motor 75 maintenance cleaning 61 life expectancies of supplies 50 manua
177. per path Engine test The engine test is used to verify that the print engine is functioning correctly The formatter is bypassed during an engine test so the engine test is useful for isolating printer problems Because the engine test prints horizontal lines along the entire printable area of a page it is also useful for checking and adjusting registration The type of engine test and the input tray depend on the last print job During the engine test the printer pulls media from the input tray that was used for the last print job The last print job also defines the type of engine test If the last print job was a color print job then a color engine test is performed If the last print job was a black only print job then a black only engine test is performed Printing an engine test The engine test switch is inside tray 1 on the left side just below the front cover To print an engine test 1 Turn off the printer 2 Turn on the printer 3 Open tray 1 and load paper 4 Press the engine test switch shown below The formatter must be connected to the ECU to perform an engine test Otherwise the printer does not print the engine test Location of the engine test switch Performing a continuous self test 1 Turn the printer off Press and hold Y Go 218 Chapter 6 Troubleshooting ENWW Note Note Figure 6 4 Note ENWW 3 Turn the printer on and continue to hold o Go for at least 20 seconds b
178. perations 77 replacing 123 top door replacing 125 top output bin features 5 jams clearing 174 locating 7 troubleshooting 210 using 38 top plate replacing 142 top of page sensor replacing 130 transfer belt cleaning operations 90 transfer belt operations charging 88 cleaning 90 92 separating 89 transfer operations image formation 84 87 transfer roller life expectancy 51 replacing 152 testing 219 transfer roller plate replacing 152 transparencies loading 39 output paths 38 specifications 17 22 tray 1 default selection 37 error messages 184 loading media 39 locating 7 replacing 133 sensors 75 separation pad replacing 135 solenoids 75 troubleshooting 208 tray 2 default selection 37 error messages 184 jams clearing 172 loading media 40 locating 7 models including 37 operations 76 pickup roller replacing 162 ENWW replacing 118 separation pad replacing 51 57 size specifications 15 troubleshooting 208 tray 3 default selection 37 errormessages 184 jams clearing 172 loading media 42 locating 7 models including 37 operations 76 pickup roller replacing 163 separation pad replacing 51 57 size specifications 15 troubleshooting 208 trays default selection 37 errormessages 184 features 5 included 2 jams clearing 172 locating 7 media supported 17 models including 37 operations 76 replacing 118 133 specifications 17 toner catch removing 151 troubleshooting 208 trou
179. process paper toner and dust particles can accumulate inside the printer Over time this buildup can cause print quality problems such as toner specks or smearing Cleaning the printer Use a cleaning page to correct and prevent print quality problems such as toner specks or smearing AQBboCc AaBhEc AQBhCc AaBkCc AaBbCc Figure 3 1 Smearing AABbGc AaBbGc AaBbCc AaBbCc AaBbCc Figure 3 2 Toner specks To use a cleaning page Note The following procedure must be performed from the HP LaserJet Toolbox To clean the printer when the computer is running an operating system that does not support the HP LaserJet Toolbox see the Late Breaking Readme on the CD ROM or visit www hp com support clj2550 1 Make sure that the printer is turned on and in the Ready state Open the HP LaserJet Toolbox On the Troubleshooting tab click Maintenance click Cleaning Page and then click Print A page with a pattern prints from the printer 4 Atthe printer remove any print media that might be in tray 1 ENWW Cleaning the printer 61 5 Remove the page that printed and load it face down into tray 1 see Figure 3 3 Loading the cleaning page in tray 1 Figure 3 3 Loading the cleaning page in tray 1 6 At the computer click Clean 62 Chapter 3 Maintenance ENWW Calibrating the printer Note ENWW The printer automatically calibrates at various times You can adjust the calibration
180. provided wire loops lance points or wire harness guides Electrostatic discharge The product contains parts that are sensitive to electrostatic discharge ESD Always service the product at an ESD protected workstation or use an ESD mat Watch for the ESD symbol shown at left to identify the parts that are sensitive to ESD Protect these parts by using an ESD wrist strap and by placing ESD sensitive parts into protective ESD pouches Les ESD User replaceable parts This chapter contains removal and replacement procedures for the imaging drum see Imaging drum and the print cartridge see Print cartridges To remove and replace the pickup roller or separation pad see Replacing the tray 1 pickup roller and separation pad Required tools The following tools are needed to service this product e 2 Phillips screwdriver with magnetic tip e Small flatolade screwdriver e Small needle nose pliers Introduction 99 e ESD mat e Penlight CAUTION A PoziDriv screwdriver will damage screw heads on the product Use a 2 Phillips screwdriver If you use a multispeed screwdriver use a torque limiter 100 Chapter 5 Removal and replacement ENWW Before performing service ENWW Follow the pre service procedures before you perform service Pre service procedures 1 2 oa E amp Remove all media from the product Place the product on an ESD mat If an ESD mat or an ESD protected workstation is not avai
181. r Note Whenever you experience color related issues calibrate the printer before trying any other steps See Calibrating the printer Only black prints Only black is printing when the document should be printing in color AdaBbCc AdaBbCc AdaBbCc AaBbCc AdaBbCc e Color mode is not selected in your program or printer driver Select color mode instead of grayscale mode e The correct printer driver is not selected in the program Select the correct printer driver e The printer is not properly configured Check the printer configuration by printing a Configuration page If no color appears on the Configuration page replace the imaging drum 200 Chapter 6 Troubleshooting ENWW Missing or incorrect color One or more colors are not printing or are inaccurate AQBbCc AaQBb amp c AaBbCc AciBoCc AABoCc e You have changed the color settings manually Return the color setting to Automatic e Windows On the Color tab of the printer driver click Automatic e Mac OS In the Print dialog box select the Color Options tab and then select Automatic e Turn the printer off and then on again e Your print media does not meet the specifications for this printer Use a different paper such as a high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e You are operating the printer in excessively h
182. r LaserJet 2550 Series Printer User Guide for information about print media specifications ENWW Solving image quality problems 203 Resolving problems that generated messages This section helps resolve problems that generated messages on the computer Messages for both Windows and Macintosh This section lists some common errors that only provide a simple message but no information for resolving the error Errors that you see in the HP LaserJet Toolbox provide their own instructions for resolving the error For other errors generated by your operating system see the documentation for the operating system or computer Limit Check Error The print job is too complex Reduce the complexity of the page For example try using fewer fonts Use one of the other printer drivers Send the print job in smaller pieces or with a fewer number of pages Messages for Windows only Error Writing to LPTx in Windows 98 or Me Make sure that the tray contains print media Make sure that the cables are connected correctly the printer is on and the Ready light is on Print a Demo page from the HP LaserJet Toolbox to make sure that the computer can communicate with the printer On the Start menu point to Settings and then click Printers Right click the HP color LaserJet 2550 driver and select Properties Click Details and then click Port Settings Clear the Check Port State before Printing check box and then click OK Click Spool Settin
183. r lower the vertical rack callout 6 to its lowest position and then align the gear with the vertical rack Figure 5 35 Removing the gear assembly 1 of 2 Note The clutch cable routing in more recent versions of the printer is different from the routing shown in Figure 5 35 Removing the gear assembly 1 of 2 Examine the routing to make sure that it is reinstalled correctly 7 Remove eight screws callout 7 from the gear plate ENWW Removal and replacement 137 8 Rotate the gear assembly away from the printer beginning with the front edge Note A grounding spring callout 8 hidden should remain attached to the printer chassis If it does not then either reattach it to the chassis or place it with the gear assembly to prevent misplacing it Figure 5 36 Removing the gear assembly 2 of 2 Reinstallation tip A grounding wire at the lower back corner of the gear assembly must be hooked around the chassis at reinstallation Callout 2 in Figure 5 37 Removing the waste toner sensor shows the grounding wire and callout 3 shows the grounding spring attached to the chassis Align the following parts with the printer chassis e gear assembly shaft e grounding spring e grounding wire Waste toner sensor 1 Unroute the cable from several cable holders 2 Remove one screw callout 1 138 Chapter 5 Removal and replacement ENWW 3 Lift the waste toner sensor away from the printer Note Callout 2 shows the
184. r might not be selected in the Chooser Print a Configuration page to make sure that the printer has been selected in the Chooser Simultaneously press Ka Go and O Cancel Job on the printer The printer driver does not automatically set up the selected printer even though you clicked Auto Setup in the Chooser The software was not installed correctly Reinstall the printer software See the HP Color LaserJet 2550 Series Printer Getting Started Guide Table 6 12 Printing Errors A print job was not sent to the printer that you wanted Another printer with the same or similar name Check the name of the printer that appears might have received your print job on the Configuration page Make sure that the cables are connected correctly the printer is on and the Ready light is on You cannot use the computer while the printer is printing Background Printing has not been selected For LaserWriter 8 6 and later Turn Background Printing on by selecting Print Desktop on the File menu and then clicking Background Printing 214 Chapter 6 Troubleshooting ENWW Table 6 12 Printing Errors continued An encapsulated PostScript EPS file does not print with the correct fonts This problem occurs with some programs Try downloading the fonts contained in the EPS file to the printer before printing Send the file in ASCII format instead of a binary encoding Your document is not printing with New York G
185. r sends memory information to the dc controller which updates the information and sends it back to the E label The dc controller instructs the E label to read information when e The printer is turned on e The top cover is closed e Acommand is sent from the video controller The dc controller instructs the E label to write information when e A specified period occurs during printing e Acommand is sent from the video controller 94 Chapter 4 Theory of operation ENWW Figure 4 29 ENWW If the E label reader fails to read or write information four times in a row the dc controller notifies the video controller that an abnormality exists in the imaging drum De controller E label reader E label hy drum Print cartridge E label Image formation system 95 96 Chapter 4 Theory of operation ENWW Removal and replacement Chapter contents ENWW ue Wen ET 97 le tte ele IB 99 Removal and replacement strategy ooooococonnccccnnnnccccnnonccinnnorc cnn nor cnn 99 Electrostatic dISCNATDE EE 99 User replaceable parts s c2cccieicstaaceadtarsaddcadeveaduananadddcadasaglsdacaaatddedansaadeduansadddadenadlavuasaxedenas 99 Required TOONS niiina irte cla oda 99 Before performing SOTVICS ascii irndicc pacto indicado abia nero AD geed sia 101 Pre ServiCe procedures ccecceceeeeeee cee ceeeeeeeeeeeaaeaaeeeeeeeeeeeadeneaaaeceseneeeeseeeescenaeeeeeneees 101 Parts removal Order dois ntc dat iii Aa
186. rectly Press y Go to clear the message If you printed the job using one of the PCL drivers try printing using the PS driver or vice versa Turn the printer off and remove or replace the language font DIMM CAUTION Inserting or removing DIMMs while power is supplied to the printer can damage the DIMMs Turn the printer off and then back on If the problem persists replace the laser scanner see Laser scanner assembly Control panel light messages 185 Table 6 7 Accessory error light messages Control panel message Event Description log error message Accessory error An error has occurred in the DIMM slot The Attention light Ready light and Go light are blinking The printer stops printing and pressing any button has no effect Table 6 8 Service error light messages Control panel message Event Description log error message The printer has a service error The Attention light Ready light and Go light are on 186 Chapter 6 Troubleshooting Recommended action 1 Turn the printer off CAUTION Inserting or removing DIMMs while power is supplied to the printer can damage the DIMMs 2 Remove the DIMM and reinstall it to make sure that it is correctly installed Make sure that you are using a supported DIMM See Accessories Move the DIMM to a different DIMM slot If the DIMM works in a different slot then DIMM slot 1 is malfunctioning To continue printing remo
187. repair or replace any product to a condition as warranted you will be entitled to a refund of the purchase price upon prompt return of the product HP products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use Warranty does not apply to defects resulting from a improper or inadequate maintenance or calibration b software interfacing parts or supplies not supplied by HP c unauthorized modification or misuse d operation outside of the published environmental specifications for the product or e improper site preparation or maintenance TO THE EXTENT ALLOWED BY LOCAL LAW THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION WHETHER WRITTEN OR ORAL IS EXPRESSED OR IMPLIED AND HP SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE Some countries regions states or provinces do not allow limitations on the duration of an implied warranty so the above limitation or exclusion might not apply to you This warranty gives you specific legal rights and you might also have other rights that vary from country region to country region state to state or province to province HP s limited warranty is valid in any country region or locality where HP has a support presence for this product and where HP has marketed this product The level of warranty service you receive may vary according
188. res 11 dropouts troubleshooting 193 drum imaging cleaning operations 93 E label 94 132 life expectancy 51 non HP supplies policy 66 operations 74 84 86 replacing 103 status light 35 178 status page printing 226 status checking 64 storing 65 warranty 24 E E label operations 93 94 removing 132 ECU pan replacing 154 electrical specifications 15 electrostatic discharge ESD 99 encoder motor 139 energy consumption 15 engine control system 70 engine test performing 218 troubleshooting 169 envelopes loading 39 output paths 38 specifications 17 20 environmental specifications paper 19 printer 16 32 error messages event log 226 Low cartridge 64 177 Macintosh 204 printer status lights 182 supplies status lights 177 Windows 204 ESD electrostatic discharge 99 event log 226 Explorer versions supported 44 ENWW F factory defaults restoring 221 faded print troubleshooting 192 fans diagrams 73 replacing 127 features 2 feed drive shaft replacing 153 fonts included 5 troubleshooting 212 215 formatter PJL commands 223 replacing 113 formatter cage replacing 111 fraud hotline 66 front cover replacing 130 front frame assembly diagrams and part numbers 246 front lower cover replacing 121 fuser control circuit 70 diagram 84 life expectancy 51 operations 89 replacing 104 roller testing 219 wrap sensor replacing 161 fuser motor diagrams 75 replacing 116 fusing delivery paper sensor P
189. restore power replace the dc controller 2 Check the cabling a Check the cable connection between the printer and the computer or network port Make sure that the connection is secure b Make sure that the cable itself is not faulty by using a different cable if possible c Check the network connection See Checking the network 3 Make sure that the print media you are using meets specifications See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications Press Go and Cancel Job simultaneously to print a Configuration page and a Supplies Status page If the printer is network enabled an HP Jetdirect page also prints e If the Configuration and Supplies Status pages do not print check the following items a Check that there is paper in at least one of the printer input trays b Ifthe page jams in the printer see Clearing jams c Try again to print the Configuration and Supplies Status pages e If the Configuration and Supplies Status pages print check the following items a Ifthe pages print correctly then the printer hardware is working The problem is in the computer you are using the printer driver or the program b Ifthe pages do not print correctly calibrate the printer See Calibrating the printer c Print the pages again If the pages still do not print correctly the problem is in the printer hardware 5 At the computer check the print queu
190. rint a Demo page or a configuration page see Troubleshooting tools The engine test is not successful Make sure that the formatter is connected to a power source Note The formatter must be connected to a power source to perform an engine test Basic troubleshooting 169 Table 6 1 Basic troubleshooting continued Do engine tests and information pages print Print an engine test see Functional checks The engine test should print without paper feed problems or print quality problems Also print a Demo page or a configuration page see Troubleshooting tools The engine test is not successful Turn off the printer turn on the printer and perform another engine test e The engine test produces a blank page Make sure that the carousel is seated correctly Replace the low voltage power supply e The engine test does not produce any pages Replace the dc controller An error indicator light message appears on the Consult the lists of control panel light messages control panel to identify and correct the error See Control panel light messages Printer Status and Alerts software generates an See Resolving problems that generated error message messages Poor print quality See Hewlett Packard limited warranty statement Is the software installed correctly Software is not installed or an error occurred Uninstall and then reinstall the printer software during software installation Ma
191. rmation e View online documentation You can view the HP LaserJet Toolbox when the printer is directly connected to your computer or when it is connected to the network You must perform a complete software installation to use the HP LaserJet Toolbox Note You do not have to have Internet access to open and use the HP LaserJet Toolbox However if you click a link in the Other Links area you must have Internet access to go to the site that is associated with the link See Other links for more information Supported operating systems The HP LaserJet Toolbox is supported for the following operating systems e Windows 98 2000 Me and XP e Mac OS X v 10 2 or later Supported browsers To use the HP LaserJet Toolbox you must have one of the following browsers Windows e Microsoft Internet Explorer 5 5 or later e Netscape Navigator 6 2 or later e Opera Software ASA Opera 7 or later Macintosh OS X v 10 2 or later only e Microsoft Internet Explorer 5 1 or later e Netscape Navigator 6 23 or later e Safari 1 0 All pages can be printed from the browser 44 Chapter 2 Installation and operation ENWW Note ENWW Viewing the HP LaserJet Toolbox 1 Open the HP LaserJet Toolbox in one of these ways e On the Windows desktop double click the HP LaserJet Toolbox icon e On the Windows Start menu point to Programs and then click the HP LaserJet Toolbox e For Macintosh OS X on the hard drive click Applications
192. rmed so that they produce hollow images the paper might be too slick for example photo glossy or coated paper Use a different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications elf characters are improperly formed so that they produce a wavy effect the laser scanner might need service Verify that the problem also occurs on the Configuration page If so replace the laser scanner e Ifthe problem is not resolved see lf the problem is not resolved 196 Chapter 6 Troubleshooting ENWW Curl or wave ee AaBbCC ABC AaBoC AaBoC AaBoC A SA e Make sure that the printer has adequate ventilation by verifying that the fan is not blocked e Plug the printer directly into a wall outlet Do not use a power strip or a UPS e Turn over the stack of paper in the tray Also try rotating the paper 180 degrees in the input tray e Set the correct type in the printer driver Heavier paper might take longer to print e Open the rear output door to print to the straight through paper path e Check the paper type and quality Both high temperature and humidity will cause paper curl Try a new unopened ream of paper or try using a different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications
193. rt on the host computer Check to see if more than two non powered USB hubs are connected in a row on the chain Disconnect all devices from the chain and connect the cable directly to the USB port on the host computer Note The iMac keyboard is a non powered USB hub Manually rotating the print cartridge carousel CAUTION Before working on the carousel turn off the printer Under normal conditions pressing Rotate Carousel brings another print cartridge to the top position However if the carousel does not rotate then rotate the print cartridge carousel manually Note All models of the HP color LaserJet 2550 printer contain a guide that is designed for access to the carousel brake 216 Chapter 6 Troubleshooting ENWW To manually rotate the print cartridge carousel CAUTION Manually rotating the print cartridge carousel when power is supplied to the printer can damage the printer Turn the printer off and disconnect the power cord before performing this procedure 1 Open the top cover 2 Press the end of a paper clip into the guide callout 1 to lift up the carousel brake 3 Rotate the carousel manually Lu ES aha EK Figure 6 2 Manually rotating the print cartridge carousel ENWW Resolving problems that did not generate messages 217 Functional checks Note Note Figure 6 3 An engine test can help to identify printing problems and a paper path check can help to identify problems in the pa
194. rum gauges that show the supply levels that remain For HP supplies only No shake cartridge design Authentication for HP print cartridges Enabled supplies ordering capability Online user guide that is compatible with text screen readers Print cartridges and the imaging drum can be installed and removed by using one hand All doors and covers can be opened by using one hand ENWW Printer overview ENWW Hardware components Before using the printer familiarize yourself with the parts of the printer Top face down output bin Power switch Optional tray 3 Optional tray 2 included with HP color LaserJet 2550n model Tray 1 Top cover Control panel NOOR WD A 7 Control panel 8 Interface ports 9 Optional tray 2 10 Optional tray 3 11 Power connector 12 Rear face up output door The interface ports are described in more detail in the next chapter See Interface ports Model and serial numbers The model number and serial number are listed on an identification label located underneath the top door Printer overview 7 The label contains information about the country region of origin and the revision level manufacturing date production code and production number of the product The label also contains power rating and regulatory information HEWLETT PACKARD Num ro r glementaire du modele Tested To Comply Hy 11311 CHINDEN BLVD Regulatory Model Number BOISB 0305
195. s us Toner potential x y Ke Developing cylinder surface potential A lequa og Drum surface potential unexposed areas Step 3 developing Transfer stage Image formation system 87 Figure 4 20 Step 5 primary transfer The primary transfer roller to which a dc positive bias is applied imparts a positive charge on the transfer belt The negatively charged toner on the drum is transferred to the positively charged transfer belt This procedure is repeated for each color yellow magenta cyan and black The dc positive bias is increased for each successive color to make sure that all of the colors adhere to the transfer belt Transfer belt Primary transfer roller OZN O Step 4 primary transfer Step 6 secondary transfer The secondary transfer roller to which a dc positive bias is applied imparts a positive charge to the print media When the print media comes in contact with the transfer belt the toner is transferred to the print media 88 Chapter 4 Theory of operation ENWW Note When secondary transfer is complete a dc negative bias is applied to the secondary transfer roller to prevent toner on the transfer belt from adhering to the secondary transfer roller Transfer belt Secondary Paper transfer roller S De bias 7777 Figure 4 21 Step 5 secondary transfer Step 7 separation The elasticity of the print media causes it to separate from the tran
196. s Select a printer driver based on the way the printer is being used e Use the PCL 6 printer driver to take full advantage of the printer features Unless complete backward compatibility with previous PCL drivers or older printers is necessary the PCL 6 driver is recommended e Use the PS printer driver for compatibility with PS needs Certain printer features are not available in this printer driver The printer automatically switches between PS 3 emulation and PCL printer languages depending on the driver you have selected Using Help The printer driver has Help dialog boxes that can be activated from the Help button in the printer driver the F1 key on the computer keyboard or the question mark symbol in the upper right corner of the printer driver These Help dialog boxes give detailed information about the specific printer driver Help for the printer driver is separate from the Help for your program HP LaserJet Toolbox You must perform a complete software installation to use the HP LaserJet Toolbox The HP LaserJet Toolbox provides links to printer status information and help information such as the HP Color LaserJet 2550 Series Printer User Guide and tools for diagnosing and solving problems You can also view explanations and animations of light messages on the control panel See HP LaserJet Toolbox for more information Software for network installations only This software is available only when the printer is conn
197. s remaining supply status use genuine HP supplies If you believe you purchased a genuine HP supply go to www hp com go anticounterfeit If you want to use this non HP print cartridge press Cancel Job to continue printing To ensure full availability and or accuracy of printing features such as remaining supply status use genuine HP supplies If you believe you purchased a genuine HP supply go to www hp com go anticounterfeit ENWW Table 6 3 Supplies Status light messages continued Control panel message Event Description log error message The magenta print cartridge is either non HP 02 cloned 12 or unauthorized 22 Note Although HP supports customer choice HP cannot guarantee the quality or reliability of non HP supplies Service or repairs required as a result of using a non HP supply are not covered under the printer warranty The magenta print cartridge light is blinking and the Attention light is on The printer stops printing The yellow print cartridge is either non HP 03 cloned 13 or unauthorized 23 Note Although HP supports customer choice HP cannot guarantee the quality or reliability of non HP supplies Service or repairs required as a result of using a non HP supply are not covered under the printer warranty The yellow print cartridge light is blinking and the Attention light is on The printer stops printing The imaging drum is either non
198. ser detection sensor Door open detection switch Pickup and feed system 79 Solenoid and clutches Figure 4 10 Solenoid Table 4 4 Solenoid Developing rotary stopper solenoid 80 Chapter 4 Theory of operation ENWW Figure 4 11 Clutches Table 4 5 Clutches Reference Description Roller engaging clutch Registration clutch ENWW Pickup and feed system 81 Printed circuit assemblies Figure 4 12 Printed circuit assemblies 1 of 2 82 Chapter 4 Theory of operation ENWW Figure 4 13 Printed circuit assemblies 2 of 2 Table 4 6 Printed circuit assemblies Developing rotary toner level detection PCA Transfer belt home position detection PCA Waste toner detection PCA Density detection PCA Dc controller Sub high voltage power supply PCA High voltage power supply PCA Registration detection PCA ENWW Pickup and feed system 83 Image formation system The image formation system which forms a toner image on media consists of several interdependent systems e Electrostatic latent image formation system e Developing system e Transfer block e Fuser e Transfer belt cleaning block e Imaging drum with ITB e Photosensitive drum Primary charging Transfer belt Toner cartridge Ee A e E label NS Developing cylinder E label ei U Blade Photo S Primary transfer sensitive l roller f __ Imaging drum d rotary O N Fuser j En e CO Ze
199. sfer belt A static charge eliminator aids separation by weakening any electrostatic adhesion Transfer belt e ej F Paper Static Secondary charge eliminator transfer roller 777 Figure 4 22 Step 6 separation Fusing stage The heat of the fuser bonds the toner to the media ENWW Image formation system 89 Step 8 fusing The dc negative bias applied to the fusing film strengthens the holding force of the toner on the print media and prevents the toner from scattering Fusing film Fusing heater CH a E Paper Toner a a a DG oe Es A Pressure roller Dc bias 77T Figure 4 23 Step 7 fusing Step 9 roller charging auxiliary transfer belt cleaning roller During secondary transfer not all of the toner on the transfer belt is transferred to the print media Toner that remains on the belt is called residual toner The auxiliary transfer belt cleaning roller to which a dc positive bias is applied imparts a positive charge to the residual toner strengthening its hold on the transfer belt This prevents toner from falling off of the transfer belt and scattering in the printer Transfer belt Charged residual toner Auxiliary transfer belt cleaning roller a f Residual toner Dc bias 77 Figure 4 24 Step 8 roller charging auxiliary transfer belt cleaning roller 90 Chapter 4 Theory of operation ENWW Step 10
200. sfully When the printer is connected to a grounded power source the control panel lights should cycle one after another and the cartridge carousel should rotate No power Control panel lights do not cycle Is the printer ready Verify that the printer is plugged directly into a wall outlet and not plugged into a power strip or a UPS Verify that the power cable is functional and that the power on off switch is on Verify that the control panel cable is seated into both the control panel and the formatter If the cable is connected correctly replace the control panel The printer should function without error indicator light messages appearing on the control panel or error messages appearing on the Printer Status and Alerts screen Control panel lights other than the Ready light are on or blinking An error message appears in the Printer Status and Alerts screen There is a problem but no control panel lights are on or blinking and no messages appear on the Printer Status and Alerts screen Do engine tests and information pages print Consult the lists of control panel light messages see Control panel light messages to identify and correct the error See Resolving problems that generated messages See Resolving problems that did not generate messages Print an engine test see Functional checks The engine test should print without paper feed problems or print quality problems Also p
201. solved 192 Chapter 6 Troubleshooting ENWW ENWW Dropouts Faded areas generally rounded occur randomly on the page CD AdaBbCc ACBECC ACBbCc AQBoCc e A single sheet of paper might be defective Try reprinting the job e The paper path might need to be cleaned Open the HP LaserJet Toolbox to use the cleaning page See To use a cleaning page for details e The moisture content of the paper is uneven or the paper has moist spots on its surface Try different paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e The paper lot is flawed The manufacturing processes can cause some areas to reject toner Try a different brand of paper such as high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e The imaging drum might be defective See e Ifthe problem is not resolved see lf the problem is not resolved Vertical lines Vertical streaks or bands appear on the page Bo Bo Bo Bo Bo e One or more print cartridges are low or defective Print the Supplies Status page to check remaining life If you are using non HP print cartridges no messages appear on the printer control panel or in the HP LaserJet Toolbox e Clean the printer using a cleaning page Open the HP LaserJe
202. st printing software To check for and install upgrades to the printing software download drivers from the Internet or HP s file transfer protocol FTP servers To download drivers 1 Go to www hp com Click the support amp drivers block 2 Type color laserjet 2550 as the product name The Web page for the drivers might be in English but you can download the drivers themselves in several languages If Internet access is not available see the flyer that came in the printer box See the Readme file for additional release information Other print system software See the Readme file that is provided on the HP color LaserJet 2550 CD ROM for additional included software and for supported languages 10 Chapter 1 Product information ENWW ENWW Software for Windows When you install the software for Windows you can directly connect the printer to a computer by using a USB or parallel cable or if your printer is network enabled you can connect the printer to the network by using the HP Jetdirect print server See the HP Color LaserJet 2550 Series Printer Getting Started Guide for installation instructions and see the Readme file for the latest software information The following software is available to all users of the printer whether you connected the printer directly to a computer by using a parallel cable or USB cable or whether you connected the printer to the network by using an HP Jetdirect print server Printer driver
203. sub high voltage transformer PCA and its holder and then unplug one connector callout 3 from the high voltage transformer PCA d rz Figure 5 57 Removing the sub high voltage transformer PCA ENWW Removal and replacement 157 High voltage transformer PCA 1 Remove the following covers and assemblies e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Optional tray 2 see Optional tray 2 250 sheet tray e ECU pan see ECU pan e sub high voltage transformer PCA see Sub high voltage transformer PCA 2 Release two cable holders callout 1 and then unplug two connectors callout 2 Remove two screws callout 3 4 Pinch six plastic pins callout 4 and then lift the high voltage transformer PCA off of the ECU pan Figure 5 58 Removing the high voltage transformer PCA 158 Chapter 5 Removal and replacement ENWW Low voltage PCA 1 Remove the following covers and assemblies e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Formatter cage see Formatter assemblies e Optional tray 2 see Optional tray 2 250 sheet tray e ECU pan see ECU pan 2 Unplug four connectors callout 1 from the low voltage PCA 3 Remove one screw callout 2 from the grounding wire 4 Remove two screws callout 3 from the fuser connector hol
204. t continued Part number RH7 1535 000CN RH7 1537 000CN RH7 1613 000CN RH7 5335 000CN RH7 5338 000CN RH7 5340 000CN RH7 5366 000CN RH7 6051 000CN RH7 7146 000CN RH7 7146 000CN RH7 7149 000CN RS5 1635 000CN RS5 1637 000CN RS5 1638 000CN RS6 2030 000CN RS6 2759 000CN RS6 2766 000CN RS6 8662 000CN RS6 8668 000CN RS7 0418 000CN RS7 0424 000CN RS7 0425 000CN RS7 0426 000CN RS7 0428 000CN RS7 0429 000CN RS7 0435 000CN RS7 0436 000CN RS7 0437 000CN RS7 0570 000CN RS7 0571 000CN RS7 0572 000CN RS7 0573 000CN RS7 0574 000CN Table and page Table 7 12 on page 267 Table 7 5 on page 251 Table 7 5 on page 251 Table 7 7 on page 255 Table 7 4 on page 247 Table 7 12 on page 267 Table 7 5 on page 251 Table 7 6 on page 253 Table 7 4 on page 248 Table 7 13 on page 269 Table 7 5 on page 251 Table 7 4 on page 248 Table 7 9 on page 259 Table 7 4 on page 248 Table 7 4 on page 247 Table 7 3 on page 245 Table 7 9 on page 260 Table 7 4 on page 248 Table 7 5 on page 251 Table 7 4 on page 247 Table 7 4 on page 247 Table 7 4 on page 248 Table 7 4 on page 247 Table 7 9 on page 259 Table 7 4 on page 247 Table 7 5 on page 251 Table 7 5 on page 251 Table 7 5 on page 251 Table 7 7 on page 255 Table 7 7 on page 255 Table 7 7 on page 255 Table 7 7 on page 255 Table 7 7 on page 255 Numerical parts list 2
205. t Toolbox to use the cleaning page See To use a cleaning page for details e Use the tools on the Troubleshooting tab of the HP LaserJet Toolbox to correct the problem e Inspect the imaging drum for toner dust oil or fingerprints e Check the jam access door e If the problem is not resolved see lf the problem is not resolved Solving image quality problems 193 Gray background The amount of background toner shading is unacceptable AQBboCc AaQBbCc AaBbCc AaBbCc AaBbCc e Clean the density sensor and perform a calibration See To use a cleaning page e Use a different paper with a lighter basis weight See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications e Check the printer environment Very dry low humidity conditions can increase the amount of background shading e One or more print cartridges are low If you are using non HP print cartridges no messages appear on the printer control panel or in the HP LaserJet Toolbox e The imaging drum might be low or empty Print the Supplies Status page to check remaining life Replace the imaging drum if it is low or empty e If the problem is not resolved see lf the problem is not resolved Toner smear Toner smear appears on the leading edge AQBboCc AaBhECc AQBhCc AaBkCc AaBbCc e Check the paper type and quality Use a different paper such as high quality paper designed for
206. t cartridges that are low or empty Messages are not created for non HP print cartridges If you are using non HP print cartridges one or Replace one or more of the print cartridges more print cartridges are low or empty The control panel lights do not indicate low or empty for non HP print cartridges Font DIMM might be selected but the font DIMM In the settings for this printer clear the Font is not physically installed in the printer This DIMM check box on the Configure tab if no font issue applies only when using an Asian DIMM is installed in the printer Select the Font language font DIMM DIMM check box only if the font DIMM is physically installed in the printer If you think that the font DIMM is installed make sure that it is installed correctly The paper curls when exiting the top output bin The paper needs to print to the straight through Open the rear output door to print to the straight paper path through paper path Remove each sheet as it exits the printer 210 Chapter 6 Troubleshooting ENWW Table 6 10 Solving general printing problems continued The paper curls when exiting the top output bin The stack was slightly curled when it was placed Turn the stack over in the tray in the tray The paper does not meet specifications See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications If you are printing on light media the Type Select Ligh
207. t eases nnnnn nro naar nr rrnnn nr 45 SSUALUS E 45 Troubleshooting TAD EE 45 AMOS TAD NEE 46 Documentation TAD oir ada 46 Device Settings window oooonnocccnnnccccnnnocccnnononcn cnn nro cnn anna nn 47 Other IAKS coccion a a ended eee ds 48 3 Maintenance Chapter contents iia a 49 Life expectancies Of supplies ooooooococccccccocococonccnnocononnnnononncnnnnnnnnnnnn nn n nn cnn nnnannn nn nc nn cnn rra 50 UsertEplaceable Parts oia iii detec ia 52 Replacing the tray 1 pickup roller and Separation Dad 52 Replacing the separation pad in optional tray 2 or in optional tray 3 57 Cleaning delt 61 Cleaning the printers ee ENEE ic Gti ivi nani ited ined vier laico 61 Calibrating the printer creerse iaa a iia ee 63 To calibrate the printer at the printer ceccceecceececeeeeeeeeceeeeneeeeeeeeeeeesececcneeeeeeeeeeeeeeeees 63 To calibrate the printer from the HP LaserJet Toolbox oooooocccconoccocconcconcnnccnnncnnncnnnnnanannos 63 Managing Biet 64 Supplies iPS iinei aaa aa SEENEN eege 64 Checking and ordering SUPPIGS secular 64 Storing e 65 Replacing and recycling supplies essseeeeessnnssrrnessernnnrsnnnasennnaanannastennnnatannaaeennnaanannaatennaae 65 HP policy for non HP supplies 66 FAP Traud Melle ET 66 4 Theory of operation Chapter contents caiicanissini iii idas ita 67 ste ele IB 68 Engine Control SYSTE EE 70 Basic sequence Of operation cccccccceeeeeeeeeceneceeeeeeeeeesecaeaeeeeeeeeeesecenaeeeees
208. t in the Type field in the printer driver setting might not be correct The printer prints but the text is wrong garbled or incomplete Not enough power is supplied to the printer Plug the printer power cord directly into a wall because the printer is plugged into a power strip outlet or a UPS The interface cable is loose or defective Disconnect the printer cable and reconnect it Try a print job that you know works If possible attach the cable and printer to another computer and try a print job that you know works Finally try a new cable The printer is on a network or sharing device and Disconnect the printer from the network or is not receiving a clear signal shared drivers and attach it directly to a computer using a parallel cable or USB cable Print a job that you know works The wrong driver was selected in the software In the Print or Printer Setup dialog box make sure that the HP color LaserJet 2550 series printer is selected as the printer and that the appropriate port is selected The printer driver is malfunctioning Print a page from the HP LaserJet Toolbox If the page prints then the problem is in the printer driver Uninstall and reinstall the printer driver The program is malfunctioning Try printing a job from another program ENWW Resolving problems that did not generate messages 211 Note Table 6 10 Solving general printing problems continued The printer prints but the text is wr
209. t the type settings for all of the media that the printer supports 4 Page Counts This section lists the total number of pages printed the number of color pages printed and information about jams Troubleshooting tools 225 Note Product Settings This section lists information that is gathered during software installation including the language and the company name Installed personalities and options This section contains information about optional items that might be installed such as DIMMs or an HP Jetdirect print server Print Settings This section contains information about printer settings that are configured in the printer driver or in the HP LaserJet Toolbox Status Log This section contains information about printer errors Supplies Status page The Supplies Status page lists the remaining life of HP print cartridges and HP imaging drums It also lists the estimated number of pages remaining number of pages printed and other supplies information You can print a Supplies Status page at the printer control panel or from the HP LaserJet Toolbox To print at the printer press o Go and Cancel Job simultaneously The Configuration page also prints and if you have an HP Jetdirect print server installed the HP Jetdirect page that lists the HP Jetdirect information also prints Supplies information is also available through the HP LaserJet Toolbox hp color LaserJet 2550 series uy lel i
210. ta print cartridges until the error is resolved If the problem persists replace the print cartridge E label reader which is located on the pressure assembly of the print cartridge carousel Reinsert or replace the print cartridge If the print cartridge light is still blinking but the Attention light is not on turn the printer off and then back on If the problem persists repeat steps 1 and 2 with yellow print cartridges until the error is resolved If the problem persists replace the print cartridge E label reader which is located on the pressure assembly of the print cartridge carousel Replace any non HP print cartridges with HP print cartridges Reinsert or replace the print cartridges If the print cartridge lights are still blinking but the Attention light is not on turn the printer off and then back on If the problem persists repeat steps 1 through 3 with sets of print cartridges until the error is resolved If the problem persists replace the print cartridge E label reader which is located on the pressure assembly of the print cartridge carousel ENWW Control panel light messages 179 Table 6 3 Supplies Status light messages continued Control panel message Event Description log error message The imaging drum is empty or missing or the E label reader is faulty The printer cannot detect the imaging drum correctly The imaging drum light is blinking and the printer s
211. tadmin Software for Macintosh For Mac 9 1 the Apple LaserWriter 8 driver must be installed to use the PPD file Use the Apple LaserWriter 8 driver that came with your Macintosh For Mac OS X use Print Center to print The printer includes the following software for Macintosh computers PPDs Mac OS 9 1 and Mac OS X classic PPDs in combination with the LaserWriter driver provide access to the printer features and allow the computer to communicate with the printer An installation program for the PPDs is provided on the HP color LaserJet 2550 CD ROM PDEs Mac OS X PDEs are code plug ins that provide access to printer features such as information about the number of copies two sided printing and quality settings An installation program for the PDEs and other software is provided on the HP color LaserJet 2550 CD ROM HP LaserJet Toolbox The HP LaserJet Toolbox is supported for Mac OS 10 2 and later You must perform a complete software installation to use the HP LaserJet Toolbox The HP LaserJet Toolbox provides links to printer status information and help information such as the HP Color LaserJet 2550 Series Printer User Guide and tools for diagnosing and solving problems You can also view explanations and animations of light messages on the control panel See HP LaserJet Toolbox for more information 12 Chapter 1 Product information ENWW Note Note ENWW Uninstalling the printing software Uninstall software
212. terials for use by other industries to make a variety of useful products U S returns For a more environmentally responsible return of used cartridges and supplies HP encourages the use of bulk returns Simply bundle two or more cartridges together and use the single pre paid pre addressed UPS label that is supplied in the package that the new cartridge comes in For more information in the U S call 800 340 2445 or visit the HP LaserJet Supplies Web site at www hp com recycle Non U S returns Print cartridge information 25 Non U S customers should call the local HP Sales and Service office or visit the www hp com recycle Web site for further information regarding availability of the HP Supplies Returns and Recycling program 26 Chapter 1 Product information ENWW Regulatory statements Declaration of Conformity according to ISO IEC Guide 22 and EN 45014 Manufacturer s Name Hewlett Packard Company Manufacturer s Address 11311 Chinden Boulevard Boise Idaho 83714 1021 USA declares that the product Product Name HP color LaserJet 2550L 2550Ln 2550n Regulatory Model Number BOISB 0305 00 Including Q3709A Optional 250 sheet input tray Q3710A Optional 500 sheet input tray Product Options ALL conforms to the following Product Specifications Safety IEC 60950 1999 EN60950 2000 IEC 60825 1 1993 A1 1997 A2 2001 EN 60825 1 1994 A11 1996 A2 2001 Class 1 Laser LED Product GB4943 2001 EMC CISPR 22 19
213. that the marker for the yellow print cartridge faces the front of the printer 2 Examine the gears two marks on the smaller gear should line up with the single mark on the larger gear see the detail of the gears in Figure 5 48 Reinstalling the print cartridge carousel Note The single mark on the larger gear is adjacent to the slot for the black cartridge marked with a kK ENWW Removal and replacement 149 3 If the gears are not aligned correctly locate the marks on the gears and realign the gears Figure 5 48 Reinstalling the print cartridge carousel Registration roller assembly 1 Remove two screws callout 1 from the registration shutter assembly 150 Chapter 5 Removal and replacement ENWW 2 Rotate the registration roller assembly toward the front of the printer and then lift it towards the rear of the printer and up to remove it from the printer Figure 5 49 Removing the registration roller assembly Toner catch tray The toner catch tray is secured by two tabs underneath the tray see Figure 5 50 Removing the toner catch tray toward the front of the tray 1 Release one tab on either side of the toner catch tray and then pull the tray approximately 2 or 3 mm approximately 0 125 inch toward the front of the printer to make sure that the tab does not reseat as you perform step 2 2 Release the tab on the other side and then lift the tray out of the printer Figure 5 50 Removing the
214. the printer on to restart the print job Replace the imaging drum Replace the fuser If the problem is not resolved see lf the problem is not resolved If the problem is not resolved If the problem is not resolved try these steps 1 2 Perform a cleaning and calibration See Calibrating the printer Print the Configuration page and Supplies Status page again e If the pages print correctly then the problem is in the program the computer or the printer driver elf the pages do not print correctly then the problem is in the printer hardware The problem might be the fuser or the imaging drum Change the Type setting in the printer driver or change the print mode If this step does not help proceed to the next step Solving image quality problems 199 4 Ifthe problem persists check the paper type and quality See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications Use a different paper such as high quality paper designed for laser printers 5 Print to a different printer e If the page prints correctly then the problem might be in the printer driver Uninstall the printer driver and reinstall it e Ifthe page does not print correctly the problem is in the program or the computer See the documentation for the program or the computer Solving image quality problems color print jobs This section describes issues that can occur when you print in colo
215. tion to solve the problem Print Quality Tools Print a page that assists in solving print quality problems view information about print quality problems print the cleaning page and clean the printer and calibrate the printer to maintain color print quality Maintenance Print the cleaning page and clean the printer view information about printer supplies and view animated demos of how to replace the print cartridges and the imaging drum HP LaserJet Toolbox 45 e Paper Jams View information on locating and clearing jams and view an animated demo of how to clear jams e Supported Media View information about media that the printer supports and view information about solving problems related to print media e Demo Page Print the Demo page for this printer Alerts tab Use the Alerts tab to configure the printer to automatically notify you of printer alerts The Alerts tab has links to the following main pages e Set up status alerts e Set up e mail alerts e Administrative settings Set up status alerts page On the Set up status alerts page you can choose to turn alerts on or off specify when the printer should send an alert and select from two different types of alerts e Pop up message e Taskbar icon Click Apply to activate the settings Set up e mail alerts page On the Set up e mail alerts page you can set the e mail addresses that you want to have alerts sent to and specify what kind of alerts should go
216. to 104 F Temperature Relative humidity 20 to 70 10 to 80 95 or less Values are subject to change See www hp com support clj2550 for current information Table 1 6 Acoustic emissions HP color LaserJet 2550 series Printing 20 ppm Laag 6 6 Bels A Operator position printing at 20 ppm Loam 62 dB A Bystander position printing at 20 ppm Loam 52 dB A Values are subject to change See http www hp com support clj2550 for current information 16 Chapter 1 Product information ENWW Media specifications This section contains information about the sizes weights and capacities of media that each tray supports Supported media weights and sizes This section contains information about the sizes weights and capacities of paper and other print media that each tray supports Table 1 7 Tray 1 specifications Paper Minimum 76 x 127 mm 3 x 60 to 177 g m 16 to 47 Ib Up to 125 sheets of 75 g m 5 inches 20 lb paper Maximum 216 x 356 mm 8 5 x 14 inches Glossy paper Same as the preceding 75 to 120 g m 20 to 32 Ib Maximum stack height 12 mm listed minimum and 0 47 inches maximum sizes HP Cover paper 203 g m 75 Ib cover 50 typically Transparencies and Thickness 0 10 to 0 13 mm 50 typically opaque film 3 9 to 5 1 mils Labels Thickness up to 0 23 mm 50 typically up to 9 mils Up to 90 g m 16 to 24 lb Up to 10 The printer supports a wide range of standard and
217. to local standards HP will not alter form fit or function of the product to make it operate in a country region for which it was never intended to function for legal or regulatory reasons TO THE EXTENT ALLOWED BY LOCAL LAW THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE REMEDIES EXCEPT AS INDICATED ABOVE IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT SPECIAL INCIDENTAL CONSEQUENTIAL INCLUDING LOST PROFIT OR DATA OR OTHER DAMAGE WHETHER BASED IN CONTRACT TORT OR OTHERWISE Some countries regions states or provinces do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you THE WARRANTY TERMS CONTAINED IN THIS STATEMENT EXCEPT TO THE EXTENT LAWFULLY PERMITTED DO NOT EXCLUDE RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU ENWW Hewlett Packard limited warranty statement 23 Limited warranty for the print cartridges and imaging drum 24 This HP product is warranted to be free from defects in materials and workmanship during its useful life end of life is indicated by a printer control panel low life message This warranty does not cover products that have been modified refurbished remanufactured misused or tampered with in any way This limited warranty gives you specific legal rights You may have other rights which vary
218. to which e mail addresses You can have two e mail destinations for the following alerts e Supplies e Service e Paper path e Advisory You must set up a simple mail transfer protocol SMTP server to send e mail alerts Documentation tab The Documentation tab contains links to these information sources e Print How Do I Contains information about how to use the printer to print different types of print jobs for example how to manually duplex e Series Printer User Contains the information about the printer usage warranty specifications and support that you are currently reading The Series Printer User is available in both HTML and PDF format e Readme Contains important information about the printer that is not available in the Series Printer User The Late Breaking Readme contains last minute information about the printer in English only 46 Chapter 2 Installation and operation ENWW Note ENWW Device Settings window When you click the Device Settings button a new window opens The Device Settings window has the following sections e Information tab e Settings tab e Network link Information tab The Information tab provides quick links to the following information e Device Status View information about the printer s current status e Supplies Status View information about the supplies installed in the printer A link is provided to the HP Web site for ordering supplies e Event Log View a history
219. toner catch tray ENWW Removal and replacement 151 Transfer roller plate CAUTION Do not touch the black sponge portion of the transfer roller 1 Remove the toner catch tray see Toner catch tray 2 Remove two screws callout 1 from the transfer roller plate 3 Lift the transfer roller plate straight up to remove it from the printer Figure 5 51 Removing the transfer roller plate Transfer roller CAUTION Do not touch the black sponge portion of the transfer roller 1 Remove the following assemblies e Toner catch tray see Toner catch tray e Transfer roller plate see Transfer roller plate 2 Use needle nose pliers to gently squeeze the small tabs at the right side of the transfer roller see the detail in Figure 5 52 Removing the transfer roller and then also squeeze the tabs at the left side of the transfer roller to release the roller Note Be careful not to bend the thin metal strip adjacent to the tabs on the right side of the roller 152 Chapter 5 Removal and replacement ENWW Note Figure 5 52 Note ENWW 3 Lift the transfer roller up from the right side slide it to the right and lift it out of the printer The small grounding spring that is underneath the left side of the transfer roller is attached to the transfer roller It is removed with the transfer roller The small grounding spring that is underneath the right side of the transfer roller remains in the chassis
220. tops printing The black print cartridge is either non HP 00 cloned 10 or unauthorized 20 Note Although HP supports customer choice HP cannot guarantee the quality or reliability of non HP supplies Service or repairs required as a result of using a non HP supply are not covered under the printer warranty The black print cartridge light is blinking and the Attention light is on The printer stops printing The cyan print cartridge is either non HP 01 cloned 11 or unauthorized 21 Note Although HP supports customer choice HP cannot guarantee the quality or reliability of non HP supplies Service or repairs required as a result of using a non HP supply are not covered under the printer warranty The cyan print cartridge light is blinking and the Attention light is on The printer stops printing 180 Chapter 6 Troubleshooting Recommended action Reinsert or replace the imaging drum If the imaging drum light is still blinking but the Attention light is not on turn the printer off and then back on If the problem persists repeat steps 1 and 2 with imaging drums until the error is resolved If the problem persists replace the imaging drum E label reader see E label reader for imaging drum E labels If you want to use this non HP print cartridge press Cancel Job to continue printing To ensure full availability and or accuracy of printing features such a
221. tray before printing is complete can cause jams 6 On the back of the printer lower the rear output door if you are printing on special media such as labels envelopes or heavy or light paper to prevent curl Loading optional tray 2 Optional tray 2 supports standard size paper only including average weight letterhead and prepunched paper For additional information about loading letterhead and prepunched paper see the HP Color LaserJet 2550 Series Printer User Guide CAUTION Print special print media such as labels and transparencies from tray 1 only Printing special print media from optional tray 2 or optional tray 3 can cause jams 40 Chapter 2 Installation and operation ENWW Note ENWW To load optional tray 2 1 Pull optional tray 2 out of the printer and remove any paper 4 Load the paper If this is special paper such as letterhead load it with the side to be printed facing down and the top edge toward the front of the tray If you are manually duplexing see the HP Color LaserJet 2550 Series Printer User Guide for loading instructions Loading media 41 5 Make sure that the stack of paper is flat in the tray at all four corners and keep it below the height tabs on the paper length guide in the rear of the tray Push down on the metal paper lift plate to lock it into place 6 Slide the tray back into the printer If you set the rear of the tray to one of the longer sizes the back of the tray will
222. umid or dry conditions Verify that the printer environment is within humidity specifications e A print cartridge might be low on toner Check the printer control panel print a Supplies Status page or view the HP LaserJet Toolbox to see supplies status If you are using a non HP cartridge none of these sources will provide information about a low or empty print cartridge If a cartridge is low on toner replace the print cartridge e Clean the sensors and perform a calibration See To use a cleaning page ENWW Solving image quality problems 201 Color prints inconsistently A color is printing inconsistently after you load a new print cartridge AaBboCc AaBboCc AaBbCc AaBbCc AaBbCc e Another print cartridge might be low on toner Check the supplies status lights or the HP LaserJet Toolbox to see if a print cartridge is low and replace it if necessary If you are using a non HP print cartridge it might be low or empty but you will receive no indication e Print cartridges might be improperly installed Remove the print cartridge for the color that is printing inconsistently and reinstall it e Your print media does not meet the specifications for this printer Use a different paper such as a high quality paper designed for laser printers See the HP Color LaserJet 2550 Series Printer User Guide for information about print media specifications Colors do not match The colors on the printed page do not match th
223. ut fewer than 30 seconds The Attention and Ready lights turn on during the continuous self test S Release e Go The device lights begin cycling from front to back The self test process runs until the printer is in the Ready state This test is similar to the NVRAM initializer for more information see NVRAM initializer S To terminate the continuous self test press Cancel Job High voltage power supply check The high voltage power supply PCA provides the necessary voltages for the electrophotographic processes To check the print cartridge connection points 1 Turn the print cartridge over and visually inspect the two connection points on the ends of the print cartridge If they are dirty or corroded clean the connections If they are damaged replace the print cartridge Print cartridge high voltage connection points 2 Ifthe connection points are dirty or corroded then clean the connections If they are damaged then replace the print cartridge Use only isopropyl alcohol to clean the connections Paper path check If media is not being picked up or is not moving through the paper path you might want to observe all of the paper motion activities Override the door interlock SW301 and the laser scanner switch to observe the following actions e Motor rotation e Solenoid action e Pickup roller motion e Drive roller transfer roller fuser roller and gear and delivery roller motion To overri
224. val and replacement ENWW 3 Rotate the top of the cover away from the printer and then downward to release the internal tabs under the cover Figure 5 19 Removing the back cover Top cover 1 Remove the following covers e Right and left side covers see Right and left side covers e Interface cover see Interface cover e Back cover see Back cover 2 Open the top door 3 Press the small tab on the gear callout 1 to release the gear ENWW Removal and replacement 123 4 Remove the gear to release the top door rack callout 2 4 X D Figure 5 20 Removing the top cover 1 of 2 Note Return the gear to its shaft after releasing the top door rack 124 Chapter 5 Removal and replacement ENWW 5 Remove three screws callout 3 from the top cover Figure 5 21 Removing the top cover 2 of 2 6 Lift the top cover off of the printer Reinstallation tip Lift the vertical rack callout 4 up to its highest position and then align the notch on the gear with the lip on the top door rack Top door 1 Remove the following covers Right and left side covers see Right and left side covers Interface cover see Interface cover Back cover see Back cover Top cover see Top cover 2 Turn the top cover over 3 Firmly flex the top door arm callout 1 to release the plastic pin callout 2 on either side ENWW Removal and replacement 125 4 Release the pin on the other side and
225. variable It also performs a system reset NVRAM initializer resets the following e All menu settings to factory default values e Factory settings such as formatter number page counts and factory paper settings Jetdirect NVRAM is not reset by performing an NVRAM initialization To perform an NVRAM initialization If possible print a Configuration page before performing an NVRAM initialization The Configuration page contains the information needed to restore the printer data 1 Turn the printer off 2 Press and hold Go Service mode functions 221 3 Turn the printer on and continue to hold Go for at least 30 seconds but fewer than 40 seconds K Release Go Note The Attention Ready and Go lights are on during an NVRAM initialization 5 The device lights will begin cycling from front to back The NVRAM initialization process runs until the printer is in the Ready state Note This process is similar to a continuous self test For more information see Functional checks After the initialization is complete you can use PJL commands to restore some of your printer settings see Using PJL commands Error report Use the following steps to print an error report 1 Turn the printer off 2 Press and hold Go 3 Turn the printer on and continue to hold Go for at least 40 seconds but fewer than 50 seconds Ss Release Go Note The Attention light turns off during the error rep
226. ve the DIMM from DIMM slot 1 Recommended action Press and hold Go to see a secondary error light message and then see the secondary error light messages in this table to identify the service error You can also use the simulator in the printer driver or the event log messages to identify the service error ENWW Table 6 8 Service error light messages continued Control panel message Event Description log error message Secondary message Scanner error Fan motor error Engine communication error Dc controller memory error The formatter is not communicating with the printer engine 50007 The dc controller is faulty 50021 Low fuser temperature error Slow fuser error High fuser temperature error Fuser drive circuit error The Ready and Go lights are on ENWW Control panel light messages Recommended action Turn the printer off and then back on Turn the printer off and then reseat the laser scanner cable Replace the laser scanner see Laser scanner assembly Turn the printer off Check cable connections to the fan Turn the printer back on If the error persists replace the fan see Air duct and fan Turn the printer off and then back on Check the connections to the formatter and the dc controller Replace the formatter see Formatter assemblies Replace the dc controller see Dc controller Replace the laser scanner see Laser scanner assem
227. w print cartridge The yellow print cartridge is low The printer continues to print without any action required until the print cartridge is empty Order a new print cartridge ENWW Control panel light messages 177 Table 6 3 Supplies Status light messages continued Control panel message Event Recommended action log error message Description The black print cartridge light is blinking and the printer stops printing The cyan print cartridge light is blinking and the printer stops printing 178 Chapter 6 Troubleshooting The imaging drum is low The print cartridge is empty or missing 40208 or the E label reader is faulty 10000 The printer cannot detect the print cartridge correctly The print cartridge is empty or missing 40207 or the E label reader is faulty 10001 The printer cannot detect the print cartridge correctly The printer continues to print without any action required until the imaging drum fails Order a new imaging drum Reinsert or replace the print cartridge If the print cartridge light is still blinking but the Attention light is not on turn the printer off and then back on If the problem persists repeat steps 1 and 2 with black print cartridges until the error is resolved If the problem persists replace the print cartridge E label reader which is located on the pressure assembly of the print cartridge carousel Reinsert or replace the print
228. waiting for the special media 41103 The Attention light is blinking and the Go light is on The printer stops printing The printer has finished printing the first side of a manual duplex job and the printer is waiting for the pages to be reloaded so it can print the second side Someone is trying to print by Source tray and there is no media in the selected tray The print image is larger than the size of media in the tray The printer has an Attention with Ability to Continue error 184 Chapter 6 Troubleshooting Recommended action Load media into tray 1 If the printer does not begin printing after the media has been reloaded press E Go Or press Ka Go to try to print from another tray if another tray is installed Note Single page print jobs are not printed when o Go is pressed After loading media into tray 1 reprint the page After loading media into tray 1 and pressing o Go multiple page printjobs continue to print but the page that was to be printed when the printer stopped printing does not print Reprint the page after the current print job is complete Reload the pages If the printer does not begin printing after the pages have been reloaded press Go Add media to the selected tray to print from it Press o Go to try to print from another tray Load the correct size media and then press 9 Go Press o Go for the printer to attempt
229. y Statement iii oido adi s 27 EE CEET 28 Laser Safety Statement cuca ceauset Aida iii tit 28 Canadian DOC Statement aitanoci nnio EAR EEN 28 Korean EMI statement A 28 Finnish laser StateMent satisecsescadearverecedeadsnceuseagaaeneessaatadiansaadeceiussaadaeanenad dadesaanacdeaneaandeess 29 2 Installation and operation Chapter Content ccccccccceceeeeeeeeeeeceeeeaeeeeeeeeeeeeeesaeceaaaeaaeeeeeeeeeeeseesecscccasaeeeeeeeeeeeseeesesnaeeees 31 Operating E Vire TU ELE 32 Interface POMS x wie aaeeea enar di a a aaa ade aa aaa aaa badra e i tedan ihian i aineta 33 Controlpanel features iii ona 34 Understanding Supplies Status 2 0 0 0 ccececcececce cee ceeeeeeeececaeceeeeeeesececcanaeeeseeeeeeseesnceeeeees 34 Understanding Printer Status iia a etna sarees cd aed ede hi deed eee 35 MPU TRAYS seetees nie daasieenl sewed ee cca seed daa tena sanbietaeeheadbeceed eee nel aetna aan ate eae 37 Printer Output paths ER 38 TOP OUUPUT BIM italia idas riales 38 Rear Output COOK ataca 38 Loading media EEN 39 Loading RCM 39 Loading optional tray 2 40 Loading optionalitray EE 42 HP LaserJet Toolbox cuina id genee E 44 Supported operating SYSteMS oooooocccocococcnccocononoononcnncnnnnnnnnnnonnnncnnnnnnnnnnnnnnnnnnannnnnnnnnnnnnnnnnes 44 Supported browsers cccccecceceeeeeeeeeececeaeeeeceeeeeeeeseceaaaaeaeeeeeeeeeeesecccaeeeeeeeeeeseeeeesenaees 44 Viewing the HP LaserJet Toolbox ccc ececeee eee eenee eee eeecne tes

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