HP LaserJet 9000,9050, 9000mfp, 9040mfp and
Contents
1. see Figure 7 2 Remove the back cover see Figure 8 3 Remove Trays 2 and 3 4 Remove four gold screws two from each rail see Figure 11 1 call out 1 5 Pull the rails out from the front of the printer http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Page 10 of 18 6 Face the right side of the printer 7 If the 2000 sheet feeder Tray 4 is installed remove the Paper Path Connecting Unit PPCU by sliding two levers toward the center of the unit see Figure 11 2 call out 2 8 Remove three screws from the right lower cover see Figure 11 3 call out 3 9 Rotate the lower edge up to release two tabs see Figure 11 3 call out 4 10 Remove the right lower cover Three screws Release two tabs http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Figure 15 J 220 and J 221 connectors Cable guides Figure 16 Registration handle Four silver screws PIU handle Figure 17 Page 11 of 18 11 Face the back of the printer 12 Remove the J 220 and J 221 cable connectors from the DC Controller see Figure 11 4 call out 5 13 Carefully unwind the cables from the cable guides see Figure 11 4 call out 6 14 Face the right side of the printer 15 Push the green registration handle down sl2. Channel Services Network Page 13 of 18 E beer Two gold screws top How to resolve a False 13 20 error message During power up printer never displays CHECKING PAPER PATH on the control panel and the HVPS has notjust been replaced lf the printer still starts up to a 13 20 error and never displays the CHECKING PAPER PATH message see the following note NOTE During boot up at some point the printer should display CHECKING PAPER PATH on the control panel This indicates that the printer is polling the paper path sensors It polls the sensors in the fuser first then the rest of the sensors in the paper path If the printer never displays this CHECKING PAPER PATH message during power up and goes straight to a 13 20 error message and the previous troubleshooting has been performed then the printer probably has the false paper jam scenario and qualifies for the service note repair A change has been made in the DC Controller firmware to eliminate the false the fuser is incorrectly reporting a jam condition when there is not one 13 20 paper jams The fuser should also be replaced at the same time to ensure no extra toner or calcium carbonate that may have built up in the fuser causes any future issues Parts required part numbers are subject to change Part description Part number part numbers are subject to change Fuser assembly C8519 69033 110V C8519 69034 220V DC Controller C8519 69028 NOTE Technicians Print a Configuration page
3. delivery assemblies If the printer still starts up to a 13 20 error message but does display CHECKING PAPER PATH on the control panel then there is an issue with either Tray 1 the registration assembly or the face down delivery assembly top output This may be as simple as removing stuck media from the sensors or may involve replacing one of these assemblies if damaged An issue with any of these assemblies can cause a 13 20 error message Check the Tray 1 assembly for any stuck paper or damage before replacing any parts A damaged Tray 1 can cause the printer to boot up to a 13 20 error and display CHECKING PAPER PATH on the control panel Remove Tray 1 from the printer and power up the machine if the printer boots to a READY status then the issue has been isolated to Tray 1 Parts required part numbers are subject to change Part description Part number part numbers are subject to change Registration assembly RG5 5663 060CN Face down delivery assembly RG5 5643 080CN Tray 1 optional if damaged C8568 67902 optional if damaged denotes optional parts top Instructions on replacing the face down delivery assembly NOTE After removing the left top cover look at the delivery assembly Examine the two sensors and their respective flags for any damage or stuck media If there is stuck media in the sensors remove it and verify the flags move freely through the sensors If this is the case then the issue is probably resolved at thi
4. flat ribbon cable is fragile Do not bend or fold it T 2 Remove the flat ribbon cable connector Figure 19 1 call out 1 from the DC Controller 3 Unplug the low voltage power supply cable connector Figure 19 1 call out 2 from the DC Controller and unroute the cable from the cable guides Figure 19 1 call out 3 4 Remove three silver screws Figure 19 2 call out 4 5 Push the black locking tab Figure 19 2 call out 5 away from the HVPS and remove the HVPS 6 14 2007 HP Channel Services Network a AD 4 Three silver screws 5 The black locking tab that holds in the HVPS top http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ Page 18 of 18 6 14 2007 June 2002 Featured Technical Article Helpful Hints on New HP LaserJets This article originally appeared in the March 2002 issue of Image Source Vol 5 Issue 3 Working on a new printer often find myself saying I wish already knew the quirky areas of the machine rather than stumbling across them D but guess that s just part of the learning curve on new printers If you ve ever found yourself thinking the same thing today have a treat for you We have recently gone through a couple of new products and found some quirks that will likely save you several hours of head scratching and under your breath mumblings HP LJ 9000 HV Contacts can cause 13 20 Paper Jam What does the high voltage pow
5. HP Channel Services Network Page 1 of 18 HP LaserJet 9000 9050 9000mip 9040mfp and 9050mfp Series Printers TWI Troubleshooting and Resolving 13 20 Paper Jam Error Messages Introduction Call Center Agents Troubleshooting to be performed with customer Tools required Parts required part numbers are subject to change Troubleshooting the cause of the 13 20 errors 13 20 errors caused by Tray 1 Registration or Face Down delivery assemblies Instructions on replacing the face down delivery assembly Instructions on replacing the registration assembly How to resolve a False 13 20 error message During power up printer never displays CHECKING PAPER PATH on the control panel and the HVPS has notjust been replaced service Note Information Instructions on replacing the DC Controller 13 20 Errors immediately after service repair for replacement of High Voltage Power Supply HVPS Removal and replacement instructions for 13 20 after service repair for replacement of HVPS Document number BPL90217 Last updated 16 Oct 2006 Minimum skill level 2 Introduction This document will assist in troubleshooting 13 20 00 paper jams Any of the following can cause 13 20 errors NOTE AGENTS It is critical to identify if the printer displays CHECKING PAPER PATH during power up then goes to a 13 20 error message or immediately boots straight to a 13 20 error This determines what is causing the issue and how to resolve it Prior to beginning troublesh
6. Resolving 13 20 errors involves a process of elimination See the following section entitled Troubleshooting the cause of the 13 20 errors for instructions Most 13 20 errors are the result of a paper jam media is stuck in one of the sensors and needs to be cleared out 3 There can also be a false 13 20 error message issue that is covered by a Modification Recommended Service Note In this scenario the printer never displays CHECKING PAPER PATH during power up and starts straight to a 13 20 error message The troubleshooting steps include how to determine if this Service Note is applicable 4 Ifthe printer has just been serviced and the High Voltage Power Supply HVPS was replaced During printer repair if the Fuser High Voltage Cable contacts get knocked out of place from the fixing connector holder assembly the printer will immediately boot up to a 13 20 error top Call Center Agents Troubleshooting to be performed with customer NOTE The following troubleshooting steps can and should be performed with the customer before a CSO is dispatched First check the entire paper path This includes 1 The printer engine 2 All input trays including Trays 1 and 4 if equipped Verify that the custom standard switch is securely locked into the specified position 3 Have the customer open Tray 1 feed cover and inspect the tray 1 input area for paper that may be stuck here If needed have the customer remove tray 1 and power up the mach
7. and check the printer number This number should be either an 18 or 19 This number indicated the DC Controller revision Numbers 18 and higher have the fix described in the Service Note to eliminate the false 13 20 jams top Service Note Information Service note information if applicable Affected serial numbers Starting serial number Ending serial number XXXX000000 XXXHO00001 top http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Instructions on replacing the DC Controller Page 14 of 18 The Formatter needs to be removed first followed by the back cover then the High Voltage Power Supply HVPS to access the DC Controller Figure 20 Back cover removal Fi mi i vr gil a al il i j i G g all 1 Flat ribbon cable connector 2 Low voltage power supply cable 3 Cable guides Figure 22 Remove screws http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 1 Turn the printer off and disconnect the power cable 2 Remove two silver screws Figure 13 call out 1 from the right back cover 3 Remove seven gold screws Figure 13 call out 2 from the back cover 4 Remove the back cover and right back cover as one part 1 Remove the back cover CAUTION The flat ribbon cable is fragile Do not bend or fold it 2 Remove the flat
8. contacted HP technical support and they suggested that either the motor was the cause of this problem or the formatter which could be giving a false error Both were changed with no effect even tried changing out the engine control board with no success However upon reinstallation it was noticed that the HVPS contacts J301 amp J304 could be cross connected referred to the manual once again and guess what the contacts were in fact hooked up in reverse causing the printer to not recognize the toner cartridge see Figures 4 and 5 for the correct and incorrect connections Figure 4 Figure 5 Upon further investigation the customer had admitted to trying to fix the printer himself for a separate problem and not knowing which wire went to where he assumed it didn t matter When connecting these wires note that both are red and both connect the exact same way It s important not to cross them as they go straight up to their appropriate connectors again see Figures 4 and 5 for the proper and improper connections To access this area of the printer 1 Open the toner cartridge door 2 Remove the left side panel as looking from the front 3 Remove the two screws as indicated by arrows in figure 6 and remove the rear panel O a Figure 6
9. ed and power cycle the printer If the 13 20 error returns then the issue is with the Duplexer give it a thorough inspection and remove any stuck paper and check the sensors in the Duplexer Test again if the 13 20 error keeps returning only with the Duplexer installed then replace it 6 Ifthe printer has just been serviced and the HVPS was replaced During printer repair if the Fuser High Voltage Cable contacts get knocked out of place from the fixing connector holder assembly the printer will immediately start up to a 13 20 error See the following section titled 13 20 Errors Immediately after Service Repair For Replacement Of HVPS This issue is not likely to be very common 7 Ifthe printer is displaying the CHECKING PAPER PATH message during restart but still goes to a 13 20 error message then see http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Page 4 of 18 the following section titled 13 20 errors caused by Tray 1 Registration or Face Down Delivery Assemblies 8 If after performing all of the previous troubleshooting the information in Step 3 does not apply and the printer still boots up to a 13 20 but does not display CHECKING PAPER PATH during start up then see the following section titled During Power up Printer Never Displays CHECKING PAPER PATH on Control Panel top 13 20 errors caused by Tray 1 Registration or Face Down
10. er supply HVPS have to do with paper jams Nothing many would say but recently after reinstalling an HVPS into an HP LJ 9000 printer we started getting instant 13 20 paper jams What could be going on After checking for paper that may have been left in the machine and verifying the flags were ok opened the Service Manual OK was really stumped One of the steps in the Service Manual is to verify the proper seating of the leaf springs under the HVPS After removing the HVPS found that one of these leaf springs was bent to the right Figure 1 and out of the case These leaf springs should be to the left over the case so when you reinstall the HVPS the contacts on the board touch the leaf springs These contacts are labeled TB1009 amp TB1010 on the HVPS Figure 2 Figure 1 Figure 2 What do these contacts have to do with a paper jam problem They monitor pressure roller bias connections between the fuser and HVPS These connections are routed through the fuser connectors and complete the fuser wrapping jam detection circuit The wrapping jam detection circuit is an arm on a solenoid that physically contacts the pressure roller when this check is done It compares the checked value to the applied value for differences If they differ the circuit determines that a wrapping jam has occurred and stops the printer a wrapping jam is when paper wraps itself around the pressure roller If you get the 13 20 error and really are having tro
11. he left back cover Figure 5 3 Open the left door 4 Face the top of the printer 5 Unplug one cable connector Figure 6 call out 1 http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network 1 Cable connector 2 Four gold screws 3 Two silver screws top Instructions on replacing the registration assembly Figure 7 Right door removal 1 Black strap 2 Locator tabs Figure 8 Page 7 of 18 6 Remove four gold screws Figure 6 call out 2 and two silver screws Figure 6 call out 3 7 Lift the delivery assembly out of the printer 1 Remove Tray 1 if there is one installed on the printer 2 Open the right door 3 Pinch and then push the two tabs on the end of the black strap to release the strap ends see Figure 7 1 call out 1 Needle nose pliers may be used if there is difficulty with this step 4 Disconnect four locator tabs on the cable cover and remove the cover see Figure 7 1 call out 2 5 Unplug two multiple wire cable connectors see Figure 7 2 call out 3 6 Lift the right door up and off the two http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network d i PTT t r TTT ENE ANANN Cable connectors Grounding cable P Slat NWN i Ai i Lan COAL ae
12. i F Ja m a m O 1 Two silver screws 2 Seven gold screws Figure 10 Registration jam removal knob removal http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr _ Page 8 of 18 hinges and remove it from the printer NOTE NOTE Do not remove the single grounding cable shown in Figure 7 2 call out 4 1 Remove two silver screws from the right back cover see Figure 8 call out 1 2 Remove seven gold screws from the back cover see Figure 8 call out 2 3 Remove the back cover and the right back cover together as one part 4 Remove Trays 2 and 3 5 Remove the print cartridge 1 Open the front door 2 Hold the registration jam removal knob firmly and remove the silver screw inside the knob Figure 9 call out 1 3 Pull the knob off the printer 6 14 2007 HP Channel Services Network Page 9 of 18 1 Remove Tray 2 and 3 if not already done 2 Remove two silver screws from the right rail cover see Figure 10 call out 1 3 Lift the upper tab to release it see Figure 10 call out 2 and push the lower tab to the right to release it see Figure 5 call out 3 4 Remove the right rail cover 5 Repeat these steps to remove the left rail cover 1 Right rail cover screws 2 Upper tab 3 Lower tab Figure 12 Paper Input Unit PIU removal 1 Remove the right door
13. ightly and pull it out to get access to the PIU see Figure 11 5 call out 7 16 Remove four silver screws see Figure 11 5 call out 8 17 Grasp the PIU handle and lift the PIU out of the printer see Figure 11 5 call out 9 CAUTION The PIU is heavy To reinstall 1 Verify that the green handle on the registration assembly is in an up position before reinstalling the PIU see Figure 11 6 call out 1 NOTE The new PIU does not include the feed separation rollers or torque limiters These must be transferred from the old PIU to the new one 2 Reinstall the right lower cover before the right rail cover http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network 1 J 215 connector Figure 19 Page 12 of 18 1 Unplug the J 215 cable connector see Figure 12 1 call out 1 from the DC Controller 2 Remove the two gold screws see Figure 12 2 call out 2 from the registration assembly 3 Lift the registration assembly up slightly and then rotate it downward until it can be pulled out of the printer chassis CAUTION Be very careful not to scrape the top of the registration assembly against the printer chassis Small black plastic pieces on top of the registration assembly can easily be damaged http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP
14. ine if it boots up to a READY status then the issue has been isolated to tray 1 If tray 1 is damaged because it is a customer installable part it can be POPPED or CREWED to the customer without dispatching a technician 4 Have the customer open the right door and lift up the registration flap A folded piece of paper can get stuck where the PS2 sensor is use a flashlight to look carefully in this area 5 Have the customer remove and inspect the duplexer if equipped Leave out for troubleshooting purposes 6 Inspect all High Capacity Output HCO device paper paths 7 Remove and inspect the fuser caution the customer that it will be hot if not damaged reinstall it 8 After doing this try power cycling the printer again If the message clears and the printer goes to a READY status then have the customer reinstall the Duplexer if equipped and power cycle the printer If the 13 20 error returns then the issue is with the Duplexer give it a thorough inspection and remove any stuck paper and check the sensors in the Duplexer Test again if the 13 20 error keeps returning only with the Duplexer installed then CREW or POP the customer a new Duplexer However the Duplexer is normally the least likely cause of this issue 9 Ask the customer if the printer is displaying the CHECKING PAPER PATH message during restart but then still goes to a 13 20 error message then see the following section titled 13 20 errors caused by either Tray 1 Regi
15. ing removal replacement the Fuser High Voltage Cable contacts can be knocked out of place from the fixing connector holder assembly As a result the contacts cannot align with http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network 1 Fuser cable contacts are to the right of the housing Figure 25 Contacts in correct position 1 Contacts are over the left edge of the housing Page 16 of 18 the contacts on the HVPS This error will occur when one or both of the contacts are out of place Figure 16 call out 1 Instructions 1 Remove the back cover 2 Remove the High Voltage Power Supply HVPS 3 Push the contacts to the left so they cover the left edge of the housing Figure 17 call out 1 4 As shown above Figure 17 call out 1 when the leaf spring contacts are pushed on top of the connector holder housing the contacts cannot make contact with the pressure roller bias and the paper wrap detection connections on the HVPS Once repositioned the contacts will now make contact with the HVPS 5 If readjusting the leaf spring contacts does not fix the problem send an HVPS and a fuser high voltage cable Possible parts required part numbers are subject to change Part description High Voltage Power Supply HVPS RG5 5728 100CN Fuser High Voltage cable Denotes optional parts RG5 8034 000CN NOTE I
16. irst then replace the right cover 1 Remove the control panel Figure 2 2 Remove the right top cover Figure 3 3 Remove two silver screws Figure 4 call out 1 4 Lift the left top cover up and then pull it toward the right side of the printer to release two locating tabs found on the underside of the cover on the left edge To reinstall Be sure to feed the control http h30125 www3 hp com hpcsn km utils V1iewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Figure 5 Left back cover removal 1 Three retaining tabs on the left side of cover 2 Two tabs on right side of cover Figure 6 Delivery assembly removal A Page 6 of 18 panel cable back up through the hole in the left top cover Figure 4 call out 2 Insert the two locating tabs found on the underside of the left cover on the left edge into the locating holes on the top of the printer 1 Remove the formatter assembly 2 Remove three silver screws from left back cover not shown 3 Rotate the left back cover toward the back of the printer to release the three retaining tabs on the left of the cover Figure 5 call out 1 and the two retaining tabs on the right side of the cover Figure 5 call out 2 1 Remove the control panel Figure 2 2 Remove the right top cover Figure 3 the left top cover Figure 4 and t
17. n most cases simply repositioning the leaf spring contacts will resolve the issue Do not replace the HVPS and the fuser high voltage cable until the leaf spring contacts have been positioned correctly to the left of the housing Verify printer functionality When the leaf spring contacts have been repositioned properly and the printer has been reassembled print several paper path tests from the printer control panel top Removal and replacement instructions for 13 20 after service repair for replacement of HVPS Figure 26 Back cover removal http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 1 Turn the printer off and disconnect the power cable 2 Remove two silver screws Figure 18 call out 1 from the right 6 14 2007 HP Channel Services Network 1 Two silver screws 2 Seven gold screws Figure 19 High Voltage Power Supply HVPS removal Figure 27 Remove connectors ttsoe te EEn mE ZOOTE tries c28 288 1 Flat ribbon cable connector 2 Low voltage power supply cable 3 Cable guides Figure 28 Remove screws http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ Page 17 of 18 back cover 3 Remove seven gold screws Figure 18 call out 2 from the back cover 4 Remove the back cover and right back cover as one part 1 Remove the back cover page 122 WARNING he
18. ooting it is useful to show the event log on the control panel and see what the error is that precedes the 13 20 error To do this look at the page count for the 13 20 error then locate all other errors that share the same page count In this list of errors sharing the same page count the first error is the most important as it is the sensor assembly that detected a jam that led to a 13 20 error To show the event log press Menu Configure Device Diagnostics then Show Event Log The event log as viewed on the control panel is scrollable and is capable of containing up to 50 errors 1 A 13 20 00 paper jam message indicates that the printer could not eject paper There may be paper blocking a sensor or a sensor may be defective or damaged Paper path sensors are located in the following parts of the printer o PS2 is located in the registration assembly Oo Sensors PS501 and PS502 are located in the fuser assembly o PS2002 PS2004 and PS2005 are located in the Duplexer if equipped o PS1451 is located in the face down delivery assembly top output http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Page 2 of 18 o PS2502 paper path sensor located in Tray 1 2 During restart the printer polls the paper path sensors in the printer starting with the sensors in the fuser An issue with any of the previously listed sensors can cause the 13 20 error message
19. ribbon cable connector Figure 14 call out 1 from the DC controller 3 Unplug the low voltage power supply cable connector Figure 14 call out 2 from the DC controller and unroute the cable from the cable guides Figure 14 call out 3 4 Remove three silver screws Figure 14 2 call out 4 5 Push the black locking tab Figure 14 2 call out 5 away from the HVPS and remove the HVPS 6 14 2007 HP Channel Services Network Page 15 of 18 CAUTION Be very careful when removing cable connectors J 215 J 219 and J 213 Do not bend or break the component that is adjacent to these cable connectors 1 Remove the 17 cable connectors Figure 15 1 call out 1 _ 3 Release the small tab Figure 15 2 call out 3 and rotate the top edge of the DC Controller away from the printer 4 Remove the DC Controller from the two metal holders Figure 15 2 call out 4 5 Reinstall in the reverse order be careful when a reconnecting the cable a connectors to the DC Controller CAUTION Be very careful when removing cable connectors J 215 J 219 and J 213 Do not bend or break the component that is adjacent to these cable connectors 1 Remove the 17 cable connectors Figure 15 1 call out 1 1 1 17 Cable connectors 3 4 Two metal holders top 13 20 Errors immediately after service repair for replacement of High Voltage Power Supply HVPS Figure 24 Contacts in wrong position Dur
20. s point Reassemble the printer and test to verify the error message has been cleared If the assembly is damaged then proceed with replacing it Figure 2 Control panel removal 1 Open the front cover 2 Release the two tabs on the underside of the control panel by pulling them toward the front of the printer Figure 2 call out 1 3 Lift the control panel straight up 4 Unplug the cable connector on the underside of the control panel and remove the control panel Me 1 Retaining tabs on underside of control panel Figure 3 Right top cover removal 1 Remove the control panel http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network 1 Small plastic cover inside right door 2 Three silver screws Figure 4 Left top cover removal ovis a a CoN Sere TE S y rr 1 1 Two silver screws 2 Opening for control panel cabling to feed through Page 5 of 18 Figure 2 2 If the multipurpose Tray 1 is installed remove it 3 Open the right door 4 Remove the small plastic cover from the upper right side of the right door by releasing the tab on the inside of the door Figure 3 call out 1 5 Remove three silver screws Figure 3 call out 2 6 Lift the right top cover up and away from the printer To reinstall NOTE If the left cover was removed it must be replaced f
21. stration or Face Down Delivery Assemblies for parts predication to go out with the CSO top Tools required e Industry standard e Flashlight for checking the sensors top Parts required part numbers are subject to change http h30125 www3 hp com hpcsn km utils ViewDocument aspx code TINF 8 23USA amp DocID emr_ 6 14 2007 HP Channel Services Network Page 3 of 18 Part description Part number Parts are listed in the appropriate sections In appropriate section top Troubleshooting the cause of the 13 20 errors NOTE Technicians After completing printer repair it is recommended that the printer s firmware be upgraded to the latest version Click here for instructions on the Web on how to perform this First check the entire paper path This includes e The printer engine e All input trays including Trays 1 and 4 if equipped 1 Open the right door and lift up the registration flap A folded piece of paper can get stuck where the PS2 sensor is use a flashlight to look carefully in this area See Figure 1 Figure 1 Close up of registration sensor 2 Remove and inspect the duplexer if equipped Leave out for troubleshooting purposes 3 Inspect all high capacity output HCO device paper paths 4 Remove and inspect the fuser if not damaged reinstall it 5 After doing this power cycle the printer again If the message clears and the printer goes to a READY status then reinstall the Duplexer if equipp
22. uble figuring it out check for paper wrapped around the pressure roller Then check these contacts and leaf springs under the HVPS Follow these steps to get to this area of the printer 1 Remove the rear cover by removing seven gold screws and two silver screws in wrap around panel on right side 2 Remove the HVPS by o Disconnecting two cables green arrows Figure 3 o Removing three screws red arrows Figure 3 o Unlatch one tab yellow arrow Figure 3 This will expose the springs Figure 1 and contacts on the HVPS Figure 2 Figure 3 Now that we understand a quirk with the new HP LJ 9000 that can cause a headache without even knowing it happened until power is applied let s move on to the quirk that can happen with the HP 1200 1220 Reversing the HP LJ 1200 HV Connectors Most technicians out there will laugh when they hear the story am about to tell though didn t until days later spent a lot of time troubleshooting this problem which hopefully you can avoid simply by reading this article It all started when an HP LJ 1200 printer came in for repair with a flashing amber error light This light when flashing indicates a general error such as paper out paper jam door open or incorrectly installed toner cartridge began troubleshooting by checking all the sensor flags which were all intact and moving freely Then checked the door open switch and the toner cartridge finding no problems
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