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LASER PRINTER Phaser 3450

1. _ ip fo XXIX Service Manual EXPLODED VIEW amp PARTS LIST Main Assembly Parts List SA Service Available _____ O Service available X Service not available Description ELA UNIT HOLDER TR L SEC Code JC96 01730A Q ty SA PMO BUSHING TR JC72 41142A SPRING ETC TR L HAWK JC61 00047A PMO TRANSFER HOLDER L JC72 41145D CAP M GEAR JC67 00039A MEA UNIT GEAR P UP MP CARDINAL JC97 01738A SPRING ETC CAM MP JC61 00003A GEAR MP PICK_UP JC66 00423A GEAR MP HOLDER_CAM JC66 00424A SOLENOID MAIN JC33 00012A SOLENOID MP JC33 00013A CBF HARNESS MAIN MOTOR JC39 00257A CBF HARNESS MOTOR JC39 00157A MEP CLUTCH FEED CARDINAL JC47 00009A PMO CAP TR JC72 41292A PBA SUB COVER JOINT JC92 01510A BRACKET P SHAFT MP JC61 00755A BEARING PICK UP JC66 10202A GEAR PICK_UP CAM JC66 00533A RING E 6044 000125 CBF HARNESS SMPS JC39 00253A CBF HARNESS MPF JOINT JC39 00205A ELA HOU NPC3_PRT JC96 02699A BRACKET P_NETWORK JC61 00680A PBA SUB NPC3_PRT JC92 01466A FAN DC CARDINAL JC31 00027B ACTUATOR
2. aes net Seren MPF Multi Purpose Feeder QNARE M i NIC JNetworkInterface Card PE dred eumemt osos NVRAM____ nonvolatile random access memory ___ BS Cono LUNI S OPC Organic Photo Conductor DPI Pet Per inen __ PBA ______ Printed Board Assembly 1 Dynamic Re omnes MEMON PCL Printer Command Language Printer DVM______ Digital ______________ Control Language ______________ ECP ______ Enhanced Capability Port PDL ______ Discription Language EEPROM Electronically Erasable Programmable PPM PagePerMinue __________ ES IA n PS EMI_______ Electro Magnetic Interference _________ PTL Pre TransterLamp 00 EP Copes o Q PID ____ Quick Printer Initiating Device _______ EPP ______ Enhanced Parallel Pot 1 ___ EW firmware ________________ _ RAM ______ Random Access Memory ________ graphics device interface _____ Only Memory PR T SCF _____ Second Cassette Feeder 1 SMPS_____ Switching Mode Power Supply _______ eee Ss SPGP _____ Samsung Printer Graphic Processor ____ HY high votage_____ SPL ______ Samsung Printer Language ___________ I s Voltage Power Spool ____ Simultaneous Peripheral Operation Online VF________interface _____
3. _ a fafa fa fa EXPLODED VIEW amp PARTS LIST Frame Assembly Parts List eee SA Service Available ______ Service available X Service not available Description SEC Code SA Remark CBF HARNESS HVPS JC39 00247A CBF HARNESS CONNECTOR JC39 00259A CBF HARNESS SENSOR JC39 00261A ELA UNIT PICK UP JC96 02683A FRAME M PICKUP JC61 00641A HOUSING M PICKUP JC61 00636A RUBBER PICK UP JC73 00127A SPRING ETC EXTENSION JC61 70950A PMO BUSHING FEED JC72 00382B HOUSING M FEED JC61 00637A RUBBER FEED JC73 00128A BEARING PICK UP JC66 10202A SPRING ETC KNOCK UP MP JC61 70913A SHAFT FEED JC66 00592A PMO BEARING SHAFT JC72 41191B SHAFT M PICK UP JC66 00440A RING E 6044 000125 ELA UNIT RETARD JC96 02682A FRAME M RETARD JC61 00640A HOUSING M RETARD JC61 00635A BUSH M RETARD JC61 00652A SPRING ETC PAD JC61 00013A HOLDER M RETARD JC61 00638A RING E 6044 000231 SPRING TS 6107 001157 PMO HUB IN RETARD JC72 00994A PMO H
4. Cover Open Sensor CN20 the three screws from the Main PBA Cover 2 Open the MPF Ass y the Rear Cover the Open 3 Unplug the two Connectors after you remove Disassembly and Reassembly 5 14 Open Cover 1 Before you remove the Open Cover you should 4 Release the lock as shown below and lift up the remove Sensor Cap Top Cover Refer to the 5 13 2 Remove two screws and take out the Stopper Sensor Cap Micro Switch PBA RC f 27 VA 5 15 Inner Cover 1 Before you remove the Inner Cover you should 2 Remove two screws and take out the Inner Cover remove MPF Ass y Refer to the 5 3 Top Cover Refer to the 5 13 Service Manual Disassembly and Reassembly 5 16 Fuser Ass y 4 Remove one screw and then take out the 1 Before you remove the Fuser Ass y you should Thermistor from the Fuser Ass y remove Rear Cover Refer to the 5 12 Thermistor 2 Remove four screws and take out the Fuser Ass y 5 Remove two screws and take the Halogen 3 Remove two screws and take the Thermostat Lamp out of the Heat Roller out of the Fuser Ass y Halogen Lamp Thermostat e Nut p e L Za 77 VAS ZA AY 9 Y Cf A y Servic
5. Overheat Sensing 230 240 C The thermostat cuts off the Fuser from the power Thermistor Open Sensing Without the initial tempera turn change of the Fuser Service Manual CIRCUIT DESCRIPTION 11 1 3 Maintenance 1 Toner Saving Specification amp Descriptions Using the DRAFT printing 62 Remark 2 Density Adjustment Normal Dark Light 3 Power Save Time OFF 15 30 45 60 minutes selectable 4 Installing the Printer 1 Unpack the box 2 Get the new image cartridge out of its bag And then remove the plastic strip from the cartridge 3 Insert the cartridge into the Printer 4 Load the paper into the cassette 5 Connect the POWER CORD and Power On 6 To check the Basic Print state At the Ready state press the Demo Key for 7sec print Self Test Pattern 7 Check the print quality Service Manual CIRCUIT DESCRIPTION 11 2 System Composition 11 2 1 System Configuration 11 2 1 1 Video Controller Board Video Controller Board receives image data from the Host Computer then convert into Bitmap Binary image or directly receive Bitmap image from the Host and connect to the input output section to process data and print out the created image 11 2 1 2 SMPS Board Engine AC is received to create the needed quantity of 5V 3 3V and 24V DC level Adequate amount of voltage is supplied to each units It also supplies AC voltage to the Heat Lamp of t
6. Service Manual R503 330KF R550 C507 MY 2A103 MGR1 4W1 8MJ C550 2KV101 R515 RDS1 2W51KJ gt gt SUPPLY 3KV471 M 20503 180V C507 MY 2A103 SV R518 R550 MGR1 4W1 8MJ gt BIAS sen R513 30KF C550 2KV101 DEV R517 RDS1 2W51KJ R516 MGR1W15MJ R515 RDS1 2W51KJ e hNN SUPPLY D504 R514 C509 3KV471 R510 100K 470 R511 C505 104 C507 MY 2A103 gt gt SUPPLY sen R513 30KF R550 MGR1 4W1 8MJ C550 2KV101 R515 RDS1 2W51KJ N D504 4KV R514 C509 3KV471 R513 30KF N DEV SUPPLY sen CIRCUIT DESCRIPTION 11 4 3 THV THV THV Section Transfer output enable is THV PWMLOW ACTIVE transfer output controlling signal When THV PWMLOW signal is applied Q201 turns on and regular voltage flows to OP AMP non inverting terminal via filter 204 C201 R205 and C202 It becomes HIGH or LOW in comparison with feedback voltage which flows to OP AMP inverting terminal If OP AMP output becomes high Q202 turns off and voltage of 24V1 flows normally to base unit of Q203 switching TR and it turns on After voltage flows to Q203 IC passes the first T201 and after passing coil it is increased as voltage that is proportionate to time When this voltage reaches to the HFE critical
7. TROUBLESHOOTING 7 2 3 JAM1 1 Recording paper is jammed in front of or inside the fuser e Description 2 Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator Feed Check and Cause Solution 1 If the recording paper is jammed in 1 Replace the SMPS or Exit Sensor front of or inside the fuser 2 Replace the Main PBA 2 If the recording paper is stuck in the 3 Reassemble the Actuator Feed and discharge roller and the fuser just Spring Actuator if the movement is after passing through the Actuator bad Feed Feed Actuator may be defec tive 7 2 4 JAM 2 1 Recording paper is jammed in front of or inside the fuser Description 2 Recording paper is stuck the discharge roller and the fuser just after passing through the Actuator Feed Check and Cause Solution 1 If the paper is completely fed out of 1 Check if the exit sensor actuator is the printer but Jam 2 occurs Exit defective sensor is defective Check if the actuator exit is deformed After the paper is completely dis Check if the lever part is deformed charged actuator Exit should return in shape to the original position to shut the Check whether burrs occur in the photo sensor Sometimes it takes assembly part of the actuator exit or longer hour than it should and does not and if the actuator is smoothly not return operated Check if f
8. x zm Service Manual Precautions 1 2 Caution for safety 1 2 1 Precaution related noxious material There is a possibility to get harm from noxious material if you ignore the below information 1 Do not touch the damaged LCD This PRINTER has LCD in control panel Noxious liquid to human body exists in the LCD If it gets into your mouth immediately see a doctor If it gets into eyes or on skin immediately wash it off for more than 15 minutes with flowing water and see a doctor 2 The toner in a printer cartridge contains a chemical material which might harm human body if it is swallowed Please keep children out of the toner cartridge 1 2 2 Precaution related electric shock or fire It is possible to get electric shock or burn by fire if you don t fallow the instructions of the manual 1 Use exact voltage Please do use an exact voltage and wall socket If not a fire or an electric leakage can be caused 2 Use authorized power cord Do use the power cord supplied with PRINTER A fire can occur when over current flows in the power cord 3 Do not insert many cords in an outlet If you do a fire can be occurr due to flow over current over flow in an out let 4 Do not put water or extraneous matter in the PRINTER Please do not put water other liquid pin clip etc It can cause a fire electric shock or malfunction If it happens turn off the power and remove the power plug from the outlet immed
9. 7 Remove four screws and lift the Pick up Unit out in the direction of the arrow as shown below Service Manual D y Power Shield 4 Unplug all of the connectors from the Engine PBA Then take out the Engine Shield Ass _ Actuator arating an Engine PBA as shown below 3 Remove nine screws and slightly lift the Engine Shield Notice Be careful not to get burnt when sep 1 Remove the Guide Front Dup Refer to the 5 23 5 2 Remove the Actuator as shown below Disassembly and Reassembly 5 24 Engine Shield Service Manual Disassembly and Reassembly 5 25 Engine PBA 5 Remove four screws and take the Engine Board 1 Before you remove the Engine Shield you should out of the Duplex Unit remove Engine SOME Y g Engine Shield Refer to the 5 25 5 26 Holder Pad Ass 3 Remove the photo interrupter and the MP Actuator 1 Before you remove the Holder Pad Ass y you should as shown below N Y Vo YA TA d COS WO Y C NL X SN QUA AM ACER o df R S 4 S 4 eg Holder Pad Ass y All Cover Refer to the 5 5 5 10 5 12 5 13 5 14 5 15 MP Pick up Ass y Refer to the 5 22 MPF Ass y Refer to the 5 3 remove 2 Un
10. page 8 13 8 5 Main Driver Assembly page 8 16 8 6 Exit Driver Assembly page 8 17 8 7 Regi Assembly page 8 18 8 8 SMPS Assembly page 8 19 8 9 Cassette 8 21 810 SCF Assembly uu ecce ea RC n page 8 23 Service Manual d 7 y Ls L gt ES N Y 0 ANNO 8 1 Main Assembl o E o LE lt gt a l a gt lt Service Manual Main Assembly Parts List Description ELA HOU BASE HOUSHING SEC Code JC96 02695P EXPLODED VIEW amp PARTS LIST ATE SA Service Available O Service available X Service not available gt SA ELA UNIT COVER MP JC96 02679E COVER M MP JC63 00127E TRAY M EXTEND MP JC63 00128B ELA UNIT KNOCK UP MP JC96 02680B PLATE M KNOCK UP MP JC61 00686B PMO SIDE GUIDE MP L JC72 01005B PMO SIDE GUIDE MP R JC72 01006B PMO IDLE KNOCK UP MP JC72 01004A MPR PAD KNOCK UP MP JC74 00011A GEAR PINION JG66 40003A SCREW TAPTITE 6003 000264 T
11. 100PIN DIMM 29LV160 16Mbit Flash Memory DATA 16 31 Regulator 1 8V USB clock 12MHz OSC FS781 Frequency System clock Scaling EMI 12MHz X tal Attenuator SPGPm nFSYNC VCLK Video Clock Memory Data Bus 78MHz DRAMD 0 31 32 ADDR 1 13 2 100PIN DIMM Memory Address Bus 5 64Mbit SDRAM 011 11 nWAIT DATA 16 31 z WR o H if o 64Mbit SDRAM Sb CL GL KE d nT NT ar 456416326 e T T 3 awe ie 4 93066 wpc nESET EIRQ 0 3 4M bit 1025 5 6 Serid EIRQ 9 nl OCS 0 5 EEPROM e o XC61FN3112MR RESET ACK BUSY SELECT ERROR FAULT 12 Centronics gt LREADY LSYNC VDO P LSU Transceiver Connector SELIN B M 9 NI UART 24 HVPS Interface PANEL 5Pin HVPS SMPS B d Service Manual BLOCKDIAGRAM Ij Mamo Service Manual moante sos ise nee FL Service Manual 10 1 CONNECTION DIAGRAM Ee EU 0 we SS NE S vc bs t is reefa g xo orf ae roan 10 Connection Diagram CONNECTION DIAGRAM Memo A Service Manual 11 Circuit Description CIRCUIT DESCRIPTION 11 1 Engine Specifica
12. JC61 00391A PMO STACKER LOCKER JC72 00995A WINDOW M LCD JC64 00048C COVER M OPEN JC63 00116B PMO STACKER_RX JC72 00973F STOPPER M HINGE OPEN JC61 00656A SHEET OVERLAY BUTTON JC63 00288A COVER WINDOW JC63 00256A ELA UNIT COVER RIGHT JC96 02697B COVER M RIGHT JC63 00115B BUTTON M POWER JC64 00043B SPRING CS CAP 6107 000014 MEA UNIT COVER REAR JC97 01743B COVER M REAR JC63 00120B PMO STACKER REAR JC72 00996B SPRING TS 6107 001160 GUIDE M DUPLEX JC61 00658A ICT BRKT REAR COVER JC70 00007A IEX SHAFT IDLE F UP JC70 20901A PMO ROLLER_F UP 2 JC72 20902A PMO DUMMY FRAME FUSER JC72 00999A TENSION PLATE JC70 00465A COVER M LEFT JC63 00117B COVER M FRONT INNER JC63 00118B COVER M FRAME EXIT JC63 00122B SCREW SPECIAL 6009 001351 SCREW TAPTITE 6003 000196 SCREW TAPTITE 6003 000119 Service Manual XXXIX OXXX O X 5 _ _ EXPLODED VIEW amp PARTS LIS
13. CABLE PHOTO INTERRUPTER JC39 00250A PMO ACTUATOR EMPTY SCF JC72 00992A IPR GND TOP JC70 11028A FOOT RUBBER HAWK16 JC61 40001A IPR BAR CROSS BOTTOM JC71 00042A PMO COVER L SCF JC63 00112B PMO COVER R SCF JC63 00113B PMO COVER DUMMY SCF JC63 00114B CBF HARNESS SCF GND JC39 40608A CBF HARNESS LIU GND JB39 00103A CBF HARNESS OPE JC39 40532A BUSH CABLE JC61 00804A ELA HOU CST SENSOR HAWK16 JC96 02127A IPR PLATE SENSOR JC70 00192A IPR BRACKET SENSOR JC70 00195A PBA SUB CASSETTE JC92 01336A HARNESS PAPER SIZE JC96 02127A 1 1 1 1 2 1 2 1 4 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 3 1 1 1 1 1 1 1 1 1 1 1 1 X lt DK gt lt Service Manual EXPLODED VIEW amp PARTS LIST SCF Assembly Parts List eee SA Service Available ______ O Service available X Service not available Description SEC Code SA Remark SCREW TAPTITE 6003 000196 SCREW TAPTITE 6003 000259 SCREW MACHINE 6001 000131 RING E 6044 000231 RING E 6044 000125 Service Manual 9 Block Diagram
14. LASER PRINTER Phaser 3450 SEHR VICE Manual LASER PRINTER 5 1 o p _ e Precautions Reference Information Specifications Summary of product Disassembly and Reassembly Alignment and Adjustments Troubleshooting Exploded Views and Parts List Block Diagram Connection Diagram Circuit Description Precautions 1 Precautions The cautions in the below are items needed to keep in mind when maintaining and servicing Please read carefully and keep the contents in mind to prevent accidents while servicing and prevent any damages to the damage 1 1 Warning for safety 1 Request the service by qualified service person The service for this machine must be performed by a service person who took the additional education of this field It is dangerous if unqualified service person or user tries to fix the machine 2 Do not rebuild it discretionary Do not attach or change parts discretionary Do not disassemble fix and rebuilt it If you do printer will not work and electric shock or a fire can be occurred 3 Laser Safety Statement The Printer is certified in the U S to conform to the requirements of DHHS 21 CFR chapter 1 Subchapter J for Class 1 1 laser products and elsewhere is certified as a Class laser product conforming to the requirements of IEC 825 Class laser products are not considered to be hazardous The laser system and
15. gt 8 10 5 Assembl EXPLODED VIEW amp PARTS LIST Service Manual SCF Assembly Parts List Description MEA UNIT SECOND FEEDER SEC Code JC96 02842B EXPLODED VIEW amp PARTS LIST SA Service Available imm available X Service not available Q ty SA Remark PMO FRAME SCF JC61 00643B MEA UNIT PICK UP JC96 02683A HOUSING PICK UP JC61 00636A RUBBER PICK UP JC73 00127A SPRING PICK UP JC61 70950A PMO BUSHING FEED JC72 00382B SHAFT PICK UP JC66 00440A PMO BEARING SHAFT JC72 41191B MEA UNIT ROLLER FEED JC96 02685A BEARING PICK UP JC66 10202A PMO GUIDE INNER SCF JC61 00650A ELA UNIT RETARD JC96 02682A COUPLING RETARD SHAFT SCF JC66 00441A SHAFT GEAR RETARD JC66 00438A GEAR PICK UP CAM SCF JC66 00534A SOLENOID WHITE JC33 00013A SHAFT FEED SCF JC66 00593A CLUTCH FEED SCF JC47 00009B GEAR REGI Z25 JC66 00420A ELA UNIT BRACKET SCF JC96 02858A MOTOR SCF JC31 00005E IPR BRK MOTOR SCF JC61 00624A GEAR REGI IDLE JC66 00408A GEAR SCF RDCN RETARD JC66 00410A GEAR SCF RDCN PICKUP JC66 00428A GEAR SCF RDCN FEED JC66 00427A IPR GND SPRING FEED JC70 00464A PHOTO INTERRUPTER 0604 001095 PCB CONTROLLER ASSY JC92 01436A CBF HARNESS SCF JC39 00248A
16. 2 Printer Driver Error 3 Error message from insufficient memory The printing job sometimes stops or due to insufficient virtual memory but it actually comes from the insuffi cient space of the hard disk 1 Select SPP Normal or ECP LPT Port the among ECP EPP or SPP in the CMOS Setup 2 Check the printer in My Computer to see if the printer driver is compatible to the present driver or delete the old driver if defective and reinstall the new driver 3 Delete the unnecessary files to secure enough space of the hard disk and start printing job again Service Manual 7 5 4 SPOOL Error TROUBLESHOOTING To spool which stands for simultaneous peripheral operations online a computer document or Description task list or job is to read it in and store it usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time for example when a printer is finished printing its current document Check and Cause Solution i Insufficient space of the hard disk in the directory assigned for the basic spool 2 If the previous printing error not solved 3 When expected to collide with other program 4 When an application program or the printer driver is damaged 5 When some files related to OS are damaged or virus infected 6 Memory is less than suggested one How to delete the data in the spool manager 1
17. 3 7 ass J y QF S 4 oS gt x lt A 5 s gt 2 d i 55 Y 4 Bg 8 Sa gt 5 co 5 7 S o E E 2 ye a al Disassembly and Reassembly 4 Remove three screws and take out the LSU AN 6 o he Ta E LH Cover Refer to the 5 10 Top Cover Refer to the 5 5 1 Before you remove the LSU you should remove RH Cover Refer to the 5 5 2 Release the lock as shown below 5 19 LSU arrow 3 Remove the Exit Roller Rack in the direction of Exit Roller Rack Service Manual Disassembly and Reassembly 5 20 Toner Sensor Board Cover LSU Lower Cover 4 Remove 3 screws and take out the LSU Lower VON 09 Z gt YY LA ao 7 A A 4 Y le NI 2 Top Cover Refer to the 5 13 LSU Refer to the 5 19 1 Before you remove the Toner Sensor Board you should remove 2 Unplug 5 Harness from the Toner Sensor PBA b M GE Q 77 Sad SON 3 Take out the Toner Sensor PBA Toner Sensor PBA Service Manual Disassembly and Reassembly 5 21 REGI Ass y 5 Remove one screw and take out the Regi 1 Before you remove the REGI Ass y you should Sensor remove RE
18. 40247B IPR PLATE SAW JC70 10232C PMO CAP CONNECTOR L JC72 00463A PMO CAP CONNECTOR U JC72 00465A CBF HARNESS OPE JB39 40532A GUIDE P REGI UPPER JC61 00675A SPRING ETC LEVER JC61 70918A HOLDER M BUSHING TX JC61 00671A GUIDE PLATE PAPER JC61 00691A CAP WIRE INLET JC67 00059A MEA RACK EXIT ROLLER JC97 01034A PMO HOLDER EXIT ROLL JC72 41006A PMO ROLLER FD F JC72 41007A PMO ROLLER FD R JC72 41008A SPRING ETC EXIT ROLL FD JC61 70911A MEC BEARING EXIT JC75 10529A ROLLER EXIT_F DOWN JC66 00668A GEAR EXIT JC66 40209A HOLDER M BUSHING EXIT JC61 00673A k Pa i fafa fafa fafa X X X lt Service Manual EXPLODED VIEW amp PARTS LIST Frame Assembly Parts List SA Service Available _____ O Service available X Service not available Description SEC Code SA Remark AS ROLLER EXIT_DUPLEX JC81 01732A IPR TERMINAL TR HAWK JC70 00132A CAP M WIRE PTL LOWER JC67 00036A PBA SUB PT
19. AC input voltage will pass through the Noise Filter circuit Bridge Diode BD1 and capacitor C6 The rectified DC voltage supplies the bias voltage to the pin6 of PWM contract IC IC1 28501 through R2 ad R3 Then turn on the Gate in the FET At this point the current passed through FET will flow through the 1st trance coil T1 Pin 4 and the supporting current in the trance 7 and 8 will be abandoned The current flowing through the 1st trance coil Q1 IIN60 will rapidly increase current in 2 Drain and this process will block the abandoned current in the 2nd trance coil of the transformer to flow out Followed by this operation due to the surrounding condition change Drain current reaches the critical rigging point of Q1 hfe This is caused by the relative decrease in Drain current compared to time This indicates that Q1 is unable to maintain On status Such condition is the area of Insufficient Gate Current According to the FET characteristics The drain voltage of Q1 operate in switching models which are composed of turn on state and turn off state When Q1 is turned off the created electrical power in ist trans 2 4 will be transfered to the 2nd trans 13 14 15 9 10 11 12 The current then flows into PC1 PHOTO COUPLER to bypass the IC1 feedback Then U1 turns on Through Such repetitious process the current flowing through 2nd trance coil is filtered to create necessary DC voltage DC output and feedback circuit are
20. Code JC96 02687B EXPLODED VIEW amp PARTS LIST SA Service Available J n available X Service not available Q ty SA Remark FRAME M CASSETTE JC61 00642B GUIDE M HANDLE JC61 00655B LABEL R CASSETTE JC68 01031A GUIDE M INNER CST JC61 00704A HOLDER M INDICATOR JC61 00639A INDICATOR M EMPTY JC64 00041B GUIDE M EXTENSION CST JC61 00644B GUIDE P SIDE L JC61 00647A CAP M GUIDE SIDE L JC67 00037A IPR P FINGER LEFT JC70 00325A BUSH M FINGER F JC61 00653A WASHER PLAIN 6031 001255 GUIDE P SIDE R JC61 00649A GUIDE M SIDE LOCK JC61 00645B IPR P FINGER RIGHT JC70 00326A GEAR PINION JG66 40003A SCREW TAPTITE 6003 000196 PLATE P KNOCK UP JC61 00651A RPR PAD CST JC73 10910A SPRING CS 6107 001174 GUIDE M REAR JC61 00646B GUIDE M LOCK A JC61 00267C KNOB M REAR JC64 00042B SPRING ETC REMAIN JC61 00414A GUIDE P REAR PAPER CST JC61 00751A GUIDE PAPER SIZE JC61 00648A _ OK OK OK Service Manual
21. Delete the unnecessary files to provide more space to start printing job 2 If there are some files with the extension name of inl Delete them and Reboot the Windows to restart printing job 3 Shut down all other programs except the current one if possible 4 Delete the printer driver completely and reinstall it 5 After rebooting the computer check for viruses restore the damaged files and reinstall the program to do the printing job 6 Add up enough memory to the PC In the spool manager the installed drivers and the list of the documents waiting to be printed are shown Select the document to be deleted and check the delete menu If you intend to delete the current document being printed the data being transferred to the printer will be put out and then the document is removed Before choosing the document the menu is still inactive Or put the document out of the list and repeat the routine as in the above or finish the spool manager Service Manual TROUBLESHOOTING Memo Service Manual EXPLODED VIEW amp PARTS LIST 8 Exploded Views and Parts List 8 1 Main Assembly 2 5 2 sank ene rn RR an ren page 8 2 8 2 Base Houshing Assembly page 8 6 8 3 Frame Assembly 0 37 page 8 7 Frame Assembly 37 71 8 8 8 4 Fuser Assembly
22. Exit Motor to a normal reverse direction It controls by dividing the acceleration section standard speed section and reducing speed section A BLDC Motor is operated by a clock and enable signal and a Step Motor is managed with an AN8495 driver IC 4 4 3 Transfer The charging voltage developing voltage and the transfer voltage are controller by PWM Pulse Width Modulation The each output voltage is changeable due to the PWM duty The transfer voltage admitted when the paper passes the transfer roller is decided by environment recognition The resistance value of the transfer roller is changed due to the surrounding environment or the environment of the set and the voltage value which changes due to the environments is changed through AD converter The voltage value for impressing to the transfer roller is decided by the changed value Service Manual Summary of product 4 4 4 Fusing The temperature change of the heat roller s surface is changed to the resistance value through the thermistor By con verting the voltage value which impressed to the resistance to the digital value through the AD converter the temperature is decided The AC power is controlled by comparing the target temperature to the value from the thermistor If the value from the thermistor is out of the controlling range while controlling the fusing the error stated in the table occurs For the domestic model the Q PID method has been applied Open
23. Heat Error When warming up it has been lower Engine Fuser Error than 68 C over 28 seconds Lower Heat Error Standby Engine Fuser Low Heat Error It has been lower than 130 C over 10 seconds Printing 8 consecutive page it has been 20 lower than the fixed fusing temperature over 7 seconds Over Heat Error It have been higher than 230 C over 10 seconds Engine Fuser Over Heat Error 4 4 5 LSU The LSU is consisted of the LD Laser Diode and the polygon motor control When the printing signal occurs it turns the LD and drives the polygon motor When the receiving light part detects the beam Hsync occurs When the polygon motor speed becomes a normal LReady occurs If two conditions are satisfied the sta tus bit of the LSU controller register becomes 1 to be judged that the LSU is ready If two conditions are not satisfied the error shown in below occurs Polygon motor error When the polygon motor s speed doesn t Photo Error become a normal Hsync error The polygon motor s speed is normal HSYNC Error but the Hsync signal is not created Service Manual Memo Service Manual Disassembly and Reassembly 2 Disassembly and Reassembly 5 1 General Precautions on Disassembly When you disassemble and reassemble compo nents you must use extreme caution The close proximity of cables to moving parts makes proper routing a must If components are removed any cables disturb
24. In the Tray1 1 Slide out the Tray1 to expose the jammed paper 3 Slide the tray back into the printer 2 Remove any misfed paper by pulling it out by the visi 4 Open and close the top cover to resume printing ble edge from the tray Make sure that all of the paper is properly aligned in the tray NOTE If the jammed paper is not invisible or if there is resis tance when you pull the paper remove the tray from the printer and carefully pull the jammed paper free from the printer Service Manual Alignment amp Adjustments In the Optional Tray2 1 Pull the optional Tray2 out of the printer 3 If you cannot find the jammed paper in the Tray2 pull the Tray1 half way out of the printer and remove the paper 2 If you see the jammed paper remove the paper from 4 Slide the trays back into the printer Open and close the the tray top cover Printing can be resumed In the Multi Purpose Tray 1 Open the Multi Purpose Tray 3 Open and close the top cover Printing can be resumed 2 Carefully remove the jammed paper from the tray Service Manual Alignment amp Adjustments 6 2 1 3 Around the Toner Cartridge Jam1 1 Open and close the top cover and the jammed paper 4 Gently pull the jammed paper towards you to remove it should exit the printer from the printer If not contin
25. Jam duplex 2 is displayed in a LCD window Check and Cause Solution 1 It is a case that a paper cannot pass a duplex sensor 2 Itis a case that a paper cannot reach to a registration sensor after it is passed a duplex sensor 1 Replace a SMPS or main PBA 2 A case that a leading edge of a paper is jammed on A check an operation of a guide front If it is worn or defective replace it 3 Check an operation of a feed roller and a registration roller If they are worn or defective replace them Service Manual TROUBLESHOOTING 7 2 7 Multi Feeding Description Multiple sheets of paper are fed at once Check and Cause Solution 1 Solenoid malfunction the solenoid does not work 1 Replace the solenoid if necessary properly Perform EDC Mode 2 Replace the Main PBA 2 Pad Friction is contaminated with foreign matter oil 3 Clean the pad friction with soft cloth dampened with 3 The face of paper is blended IPA Isopropy Alcohol 4 Use the smooth paper 7 2 8 Paper rolled in the fuser Description contaminated at intervals of 57mm on the back of a paper Check and Cause Solution 1 Contamination of the pressure roller or heat 1 After disassembling the fuser clean contami roller Background Hot off set nation between the heat roller and the ther mostor and remove the contamination of the pressure roller 2 Check the claw of t
26. Postscript Level3 win 95 98 PPD win NT4 0 PPD Mac PPD PCL5e Linux Interface Parallel IEEE 1284 Bidirectional Parallel Modes supported Compatible Nibble Byte ECP USB without HUB mode USB 2 0 compliant 12 Mbps 1 port Serial RS 232C Network Interface option for ML 2150 10 100 Base TX 10 100 Base TX 802 11b Wireless LAN option for ML 2151N Interface switching Automatic Interface time out 5min Max Font 45 Scalable Font 1 Bitmap Font Postscript 3 internal font 136 3 3 Electrical Specification Input Voltage Nominal input voltage 200 240 VAC 100 127VAC Input voltage range 189 264 VAC 90 132VAC Nominal frequency 50 60 MHz Frequency tolerance 3Hz Power Consumption Printing 450W Avg or less with SCF Idling 100W Avg or less Power Save 20W Avg or less 3 4 TONER Cartridge Developer Life span Starter 5 000 sheets A4 Size IDC 5 pattern SIMPLEX Running 10 000 sheets Developing Non magnetic Contact Developing Charging Conductive Roller Charging Toner supply Method Exchange the Developer Toner checking sensor Enable Ozone 0 1PPM or less Style Single cartridge Service Manual Specifications 3 5 Environmental Condition ITEM OPERATING STORAGE Temperature 10 30 oC 50 90 oF 20 40 oC 4 104 Humidity 20 80 10 80 RH 3 6 Paper Handling Sp
27. Service Manual CIRCUIT DESCRIPTION 11 3 3 3 BLOCK DIAGRAM of Transfer Printing Section THVPWM PWM SWITCHING REGULATION CONTROL CONTROL Ia UNIT UNIT FEEDBACK SWITCHING REGULATION CONTROL IECUR UNIT U FEEDBACK THV CIRCUIT THVREAD Service Manual CIRCUIT DESCRIPTION 11 4 High Pressure Printing 11 4 1 MHV Electric Charge Printing Section Charging output of ENABLE is MHV PWM LOW ACTIVE which is charging output controlling signal When MHV PWM signal is applied regular voltage flows to OP AMP non inverting terminal via filter R401 C401 R402 and C402 It becomes HIGH or LOW in comparison with feedback voltage which flows to OP AMP inverting terminal If OP AMP output becomes high Q401 turns off and voltage of 24V1 flows normally to base unit of Q404 switching TR and it turns on After voltage flows to Q404 IC passes the first T401 and it increases as voltage which is proportionate to time When this voltage reaches to the HFE critical point of Q404 it turns off At this time counter electromotive force is created on trans 1 by turn off action and energy is emitted to trans 2 to send voltage to output MHV voltage via high voltage output unit consisted of rectifier circuit When OP AMP output becomes low Q401 and Q403 turn on At this time base voltage of Q404 becomes GND voltage and Q404 turns off to prevent to create high voltage Charging circuit detects changes due to environment of cha
28. Swath buffer System working memory area etc when printing It stores the font list compressed into flash memory on DRAM and uses it as PCL font Capacity 16M Byte Basic upto 144M Byte Option e DIMM 16MB 32MB 64MB 128MB e Type SDRAM 100MHz 133MHz 16bit gt gt ROM DIMM It supports the option ROM DIMM 1 Slot for supporting the Postscript level 3 Capacity 4MByte Access Time 70nsec 4 2 3 RESET Circuit After printer power is ON and 50 200 ms are passed the reset signal from RESET IC XC61FN3112MR resets various IC such as the CPU Memory etc to prevent malfunction of the set by setting the initial value of port 4 2 4 CIOCK Circuit Basically it consists of the Crystal 12MHz and Capacitor 27pF which is connected to the crystal in parallel and it is inputted to the MCLLK Signal via the FS781 The purpose of the adding FS781 is substitution of EMI 4 2 5 INTERFACE Part IEEE1284 It supports the IEEE 1284 B Type Connection and the protocol supports the IPP ECP Compatibility Byte and Nibble mode gt gt USB2 0 USB2 0 Compliant 12Mbps 1 port gt gt Network e Option Ethernet 10 100 Base TX e Protocol SPX IPX TCP IP Appletalk SNMP HTTP 1 1 DLC LLC Panel e LCD 16Char 2 Line Back light Blue Key 9 Key LED 3LED The UART method is used for the controller and panel interface and the HR 48R50 Holtak Micom is used Service Manual Summary of prod
29. created by 24 of D5 and C19 5V is created by abandoned voltage from the 2nd trance coil due to D5 and C19 In order to maintain uniform DC output level detect the output level from R11 and R12 to maintain uniform level then enabled feedback by disconnecting the Shunt Regular IC IC2 and used PHOTO COUPLER 1 3 Fixed Temperature Control To control the fixed lamp the control signal of FUSER ON in Logic section and the supply of DC voltage in the SMPS section is necessary The circuit turns on when the FUSER ON sends the operation signal and the DC power is supplied The operation principle of control circuit of fixed lamp is as following Trigger current flows to Triac Driver IC6 LED due to FUSER ON of Logic Then the Photo detector of IC6 will detect the infrared ray and the Triac of IC5 will activate The current will then send the Trigger input to the Gate of Triac IC5 At this point IC5 will be activated and AC power will be supplied to the fixed lamp then the lamp will turn on and the temperature will rise Because the fixed lamp circuit uses AC voltage as it s voltage supply bidirectional Triac IC5 is applied since it has advantage in price size and reliability compared to unidirectional SCR The Gate terminal of Triac can be triggered as ordered or opposite direction signal Once the triac turns on it cannot be controlled by the Gate signal It maintains until the level of current flowing in the main terminal
30. it automatically stops Tray 3 Clutch On Of when the execution is chosen On this mode the tray 3 motor runs before 2sec from the point of the clutch on in order to check the clutch state gt When a tray 3 is not installed this function is not processed and Tray 3 Not Installed is shown Service Manual Alignment amp Adjustments 6 1 2 5 Sensor Test These Functions are considered to check the present state normal or not of the Sensors 1 Press the Menu Key until finding Sensors Test message on the panel 2 Press the Select Key when it s found 3 Press the Arrow keys until finding a suitable function 4 Press the Select Key when it s found 3 Touch a sensor you would like to test 4 Confirm a message on the LCD window for the state of it Sub Menu Description Display LCD Before touching After touching Tray1 Sensor After the tray 1 is gotten down touch the sensor and confirm the message changed Tray 1 Sensor to Tray 1 Sensor On Tray 1 Sensor Off Tray 1 Sensor On Tray2 Sensor After the tray 2 is pulled out touch the sensor Tray 2 Sensor Off Tray 2 Sensor On and confirm the message changed Tray 2 Sensor Off to Tray 2 Sensor On Tray3 Sensor After the tray 3 is pulled out touch the sensor Tray 3 Sensor Off Tray 3 Sensor On and confirm the message changed Tray 3 Sensor Off to Tray 3 Senso
31. of water chemical or small metals If those are got into the inner side of machine a fire or electric shock can occur 4 Do not install machine in areas where moisture or dust exists For example do not install machine near open windows damage maybe caused by these conditions 5 Do not place a candle burning cigarettes and etc on the machine Do not install it near to a heater A fire can occur 1 2 4 Precaution when assembly disassembly When replace parts do it very carefully Do memorize the location of each cable before replace parts for reconnecting it afterwards Do memorize Please perform the below before replace or disassemblying any parts 1 Check the contents stored in the memory All the information will be erased after replace main board The information needed to keep has to be written down 2 Remove printer cables and power cord 3 Take off printer cables and power code connected to printer 4 Do use formal parts and same standardized goods when replacing parts Must check the product name part cord rated voltage rated current operating temperature etc 5 Do not give an over force when release or tighten up the plastic parts 6 Be careful not to drop the small parts such as screws in the printer 7 Be careful not to change the location of small parts such as screws when assembling and disassembling 8 Do remove dust or foreign matters completely to prevent fire of tracking short or etc 9 Af
32. point of Q203 it turns off At this time counter electromotive force is created on trans 1 by turn off action and energy is emitted to trans 2 to send voltage to output THV voltage via high voltage output unit consisted of rectifier circuit When OP AMP output becomes low Q202 turns on At this time base voltage of Q203 becomes GND voltage and Q203 turns off to prevent to create high voltage Charging circuit detects changes due to environment of charging roller and applies proper voltage to OPC for each environment The environment changes resistance are detected by comparator and comparator converts analog input to digital output Depending on such digital output program inputted in ROM of engine controller applies proper charging voltage for each environment in consideration of resistance changes Transfer output enable is THV EA HIGH ACTIVE transfer output controlling signal When THV EA HIGH SIGNAL is applied Q300 turns off and voltage of 24V1 flows normally to base unite of Q302 switching TR for turn on After voltage flows to Q302 IC passes the coil of first T301 and after passing coil it is increased as voltage that is proportionate to time When this voltage reaches to the HFE critical point of Q203 it becomes off At this time counter electromotive force is created on trans 1 by turn off action of Q302 and energy is emitted to trans 2 to send voltage to output THV voltage via high voltage output unit consist
33. to the contact point of the toner cartridge 2 The contact point of the unit facing that of the toner car tridge also must be cleaned 3Jf the terminal assembly is unsafe Fully stick the terminal to or reassemble it after disassem bling Disassemble the side plate and push the terminal to be stuck then reassemble it 2 In case of 2 It is a phenomenon when the OPC drum of the toner cartridge is not electrically charged Clean the terminals of the charged roller then recheck it 3 In case of 3 It is a phenomenon as the devel oping bias voltage of the toner cartridge Clean the terminals of the developing roller then recheck it Service Manual TROUBLESHOOTING 7 5 The cause and solutions of bad environment of the software 7 5 1 The printer is not working 1 e Description While Power turned on the printer is not working in the printing mode Check and Cause Solution 1 Run Self Test Mode Turn the power on while pressing 1 Check the power of the printer and perform the Self the test printing button for 2 or 3 seconds before printing Test If the test printing works that means no prob works lems in the printer itself If the test printing does not work that means bad functioning of the printer not because of software 2 Check if the PC and the printer is properly connected 2 Replace the printer cable If the problems not solved and the toner cartridge installed even after t
34. 05A 5 Peak loading voltage 15A 05A 1ms 6 Ripple noise voltage 200mVp p 100mVp p 500mVp p 7 Maximum output 5W 25W 84W 8 Peak output 5W 25W 84W 1ms gt gt Consumption Power enc NN DC NAR LOT EE O esee ANG DOT NP NU ES Lic NNI TENE 3 Sleep Mode 04 001A 04A AVG 15 Wh gt gt Length of Power Cord 1830 50mm gt gt Power Switch Use Service Manual Summary of product gt gt Feature Insulating resistance over 50MQ at DC 500V Insulating revisiting pressure Must be no problem within 1min at 1500Vzc 10mA e Leaking voltage under 3 5mA Running voltage under 50A peak at 25 Cold start Under 60A peak in other conditions Rising Time Within 2sec Falling Time over 20ms Surge Ring Wave 6KV 500A Normal Common gt gt Environment Condition Operating temperature range 0 C 50 C e Maintaining temperature range 25 85 Maintaining humid range 1096 90 RH Operating atmospheric pressure range 1 gt gt Requirement CISPR CE MIC C Tick gt gt Requrement IEC950 UL1950 CSA950 C UL NOM Semko Nemko iK CB CCC CCIB GOST EPA 4 3 3 Fuser AC Power Control Fuser HEAT LAMP gets heat by using AC power The AC power controls the switch with the Triac a semiconductor switch The On Off control is operated when the gate of the Triac is turned on off by Photo triac which is in
35. 1 Remove contamination of the terminals of cartridge the toner cartridge 2 Abnormal solenoid 2 Perform the engine self test using EDC Mode to check if the Solenoid is normal 3 If not solved by the above directions 1 2 Replace the engine board 4 Turn the power off delete the data of PC and try printing again Service Manual TROUBLESHOOTING 7 2 The cause and solution of the bad discharge 7 2 1 Wrong Print Position C Description Printing begins at wrong position on the paper Check and Cause Solution Wrong sense time caused by defective feed sensor Replace the defective actuator actuator 7 2 2 JAMO Description 1 Paper is not exited from the cassette 2 Jam 0 occurs if the paper feeds into the printer Check and Cause Solution 1 Check the Solenoid by using EDC 1 Replace the solenoid Mode 2 Check if the pad is loose due to bad 2 Replace the side pad Assembly L or sealing of the side pad R if necessary Co Check the surface of the roller pick up for foreign matter 3 Clean with soft cloth dampened with IPA Isopropy Alcohol or water 4 If continuous clusters occur check 4 Replace the Main PBA and or Sensor whether the assembly slot between shaft pickup and housing pickup opens or is broken away 5 If the paper feeds into the printer and Jam 0 occurs perform EDC Mode to check feed sensor of the engine board Service Manual
36. 1 3 Usage amp Function of Key on OPE Key Function Description Remarks Menu Menu To enter the main Menu Arrow right Search a Menu Input Data To search a Menu and input a data Arrow left Search a Menu Input Data To search a Menu and input a data Select Execute Select To execute a function Cancel Stop Cancel To stop a function Upper Level Move To move to the upper level 6 1 4 Usage amp Function of LCD Characters Description Remarks Top 16 Make engineers recognizing a test location Main Men or Function is displayed Bottom 16 Make engineers recognizing a menu or function to be tested A menu or function name displayed Service Manual Alignment amp Adjustments 6 1 2 How to use EDC Engine Diagnostic Control Mode Interface Test Test Pattern Print Motor Fan Test Tray3 Interface Pattern Print Main Motor Laser Motor Duplex Forward Duplex Reverse Tray3 Motor Fan Test HVPS Test Sensor Test Solenoid Test Dev Bias Test Tray1 Sensor Tray1 Solenoid Test Charge Roll Voltage Tray2 Sensor Tray2 Solenoid Test Transfer Positive Voltage Tray3 Sensor Tray3 Solenoid Test Transfer Negative Voltage Duplex Sensor Tray2 Clutch Test PTL Test Cover Open Sensor Tray3 Clutch Test Feed Sensor Exit Sensor Development Test Setting Temperature Test Laser Diode Test Laser Ready Test Service Manual Alignment amp Adjustments 6 1 2 1 Interface Test Main controller and Tr
37. 66 00405A GEAR DUPLEX IDLE JC66 00415A GEAR RDCN DUPLEX JC66 00414A FOOT SF4000 JG61 40001A GEAR OPC DRV OUTER JC66 00645A SCREW TAPTITE 6003 000301 gt lt lt lt gt lt gt lt gt lt lt OK lt DK gt lt O Service Manual EXPLODED VIEW amp PARTS LIST 8 6 Exit Driver Assembl Exit Drive Assembly Parts List Description ELA UNIT MOTOR EXIT CARDINAL 96 02857 SA Service Available O Service available X Service not available gt SA Remark MOTOR STEP CARDINAL 2 JC31 00028C PMO IMPELLER_DRV JC72 00825A BRACKET P EXIT JC61 00623A GEAR DP IDLE JC66 40911A GEAR RDCN EXIT JC66 00419A RING E 6044 000231 GEAR FUSER IDLE JC66 00418A GEAR EXIT U ID JC66 40211B o oao AJA oO no RING E 6044 000125 GEAR RDCN FUSER IN JC66 00416A GEAR HUB CLUTCH JC66 00340A GEAR RDCN FUSER OUT JC66 00417A SCREW MACHINE 6001 000131 pol pf a a a a gt lt gt lt gt lt gt lt gt lt ox X X X O Service Manual EXPLODED VIEW amp PARTS LIST 8 7 Regi Assembly Regi Assembly Parts List ENS SA SemiceAv
38. Check the cycle of the falling of the toner 2 Check the appearance of both ends of the toner car tridge OPC drum 2 The center of the printed mat ter is contaminated with toner 1 Check whether foreign sub stances or toner are stuck to the terminal contact point of the toner cartridge 2 Check whether the state of the terminal assembly is normal 2 3 If both ends of the OPC drum are contaminated with toner Check the life of the toner car tridge Check whether it could be recy cled If it cannot be recycled Replace the toner cartridge Service Manual TROUBLESHOOTING Fault Signs Cause amp Check Solution White Black spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Light or dark black dots on the image occur periodically White spots occur in the image period ically 1 If light or dark periodical black dots occur this is because the toner cartridge rollers are cont aminated with foreign sub stance or paper particles 1 88mm interval Charged roller 2 95mm interval OPC cycle 2 If white spots occur in a black image at intervals of 95mm black spots occur elsewhere the OPC drum is damaged or foreign substance is stuck to the surface 3 If a black and white or graphic image is partially broken at irregular intervals the transfer roller s life has been expired or th
39. DE P FU R JC71 00040A ELECTRODE P FU L JC71 00041A PEX ROLLER F UP 2 JC72 20902A PMO ROLLER UPPER DP JC72 40981A PMO GUIDE CLAW JC72 41012B MEC BRUSH ANTISTATIC JC75 00095A HOLDER IDLE ROLLER JC61 00785A CAP FUSER L JC67 00056A CAP FUSER R JC67 00057A MEA UNIT LOWER FUSER JC97 01718A SCREW TAPTITE 6003 000179 SPRING ETC PR 7300 JC61 00056A BUSH M HR_R JC61 00615A GEAR FUSER 7300 JC66 40913B FRAME P FUSER JC61 00621A ROLLER HEAT JC66 00597A ROLLER PRESSURE JC66 00599A BEARING PRESSURE R JC66 10901A BEARING H R L JC66 10902A MEA UNIT GUIDE REAR JC97 01719A GUIDE M REAR JC61 00620A SPRING ETC ACTUATOR JC61 70903A SHAFT EXIT F UP JC66 00402A GEAR EXIT JC66 40209A LABEL R CAU_HOT_FU JC68 30928B PMO BUSHING TX JC72 00382A PMO ACTUATOR EXIT JC72 00988A RMO RUBBER EXIT_F UP JC73 40909B 1 1 1 1 2 2 1 2 2 1 5 1 2 1 1 1 2 2 5 1 2 1 1 1 2 2 1 1 1 1 1 2 1 1 1 1 1 1 1 3 1 2 gt lt XK 2 OK OK OK OK Service Manual EXPLODED VIEW amp PARTS
40. GI Sensor 2 Sensor Holder Top Cover Refer to the 5 13 2 Unplug the Harness Remove 3 screws remove one screw and take out the PTL PBA 6 Unplug the Harness PTL PBA 3 Release the lock as shown below and lift up the Gear Cap 1 Gear Cap 4 Take out the Regi Ass y as shown below N e eo lt oc Service Manual MP Pick Up Shaft up shaft the Bearing as shown below Pick 4 Pull and remove the lock equipment then rotate 5 Slide the cam to the left by pulling on the MP a a 15 3 2z 3 S O DA Qo 9 e E gt 5 5 gt S6 2 5 oo c s lt 5 Q lt 08 5 c 5 gt wx oO Ow oc e 2 o 2 ao 5 oF lt m or 2 x He ae oc gt 9 o0 o gt OY 3 n Ex E 0 os o 5 o Satie ct gt a 5 0 99 HO S a ne Oe wh x 5 2 5 28
41. L2 JC92 01516A CBF HARNESS THERMISTOR JC39 00255A TERMINAL P_PTL JC65 00001A SHIELD P_CONTROLLER JC63 00124A NUT HEXAGON 6021 000222 CABLE TIE 6501 000004 PHOTO INTERRUPTER 0604 001095 ELA HOU CST SENSOR JC96 02127A IPR PLATE SENSOR JC70 00192A IPR BRKT SENSOR JC70 00195A PBA SUB CASSETTE JC92 01336A HARNESS OUT FULL JC39 00250A MEA UNIT TERMINAL L JC97 01401A PMO BEARING SHAFT JC72 41191B ELA UNIT FUSER JC81 01728A ELA UNIT FUSER JC81 01729A PBA MAIN ZENER JC92 01488A PBA SUB PANEL JC92 01519A IPR P GROUND OPC JC70 00332A PBA SUB EMPTY SENSOR JC92 01511A IPR P GND SOLENOID FEED JC70 00336A IPR P GROUND SCF MAIN JC70 00334A IPR P GROUND REGI ROLLER JC70 00333A ELA HOU VARISTOR JC96 01772A IPR P_GROUND MOTOR MAIN2 JC70 00330A IPR P_GROUND GUIDE TR JC70 00328A CBF HARNESS INLET JC39 00246A HINGE M FRONT GUIDE DUP JC61 00666A AS FRAME LSU LOWER JC81 01727A SPRING ETC GUIDE DEVE JC61 70932A PMO GUIDE DEVE L JC72 00317A PMO GUIDE DEVE R JC72 00318A TERMINAL P_TR CARDINAL JC65 00005A SHEET COVER TR JC63 00132A IPR P_GROUND PLATE PAPER JC70 00339A PBA SUB EXIT SENSOR JC92 01512A TERMINAL P_HV CARDINAL JC65 00006A Service Manual
42. LIST Fuser Unit Assembly Parts List eee SA Service Available ______ O Service available X Service not available Description SEC Code Q ty SA Remark MEA UNIT BRK GEAR FU JC97 01720A RING E 6044 000231 BRACKET P FUSER JC61 00617A GEAR IDLE 33 JC66 00425A GEAR IDLE 23 JC66 00426A LAMP HALOGEN 4713 001186 LAMP HALOGEN 4713 001187 SCREW MACHINE 6001 000131 SCREW TAPTITE 6003 000179 NUT HEXAGON 6021 000222 LABEL R LV FUSER JC68 00408A LABEL R LV FUSER JC68 00407A gt lt lt 2 lt lt lt Service Manual EXPLODED VIEW amp PARTS LIST 8 5 Main Driver Assembly Main Driver Assembly Parts List Description ELA UNIT MOTOR MAIN CARDINAL JC96 02725B Harness Main Motor SA Service Available Core X Service not Q ty SA Remark MOTOR DC BLDC CARDINAL JC31 00024A BRACKET P MAIN JC61 00622A GEAR RDCN PICK_UP JC66 00411A GEAR PICK_UP DRV JC66 00412A GEAR RDCN RETARD JC66 00410A GEAR RDCN FEED JC66 00409A GEAR MP DRV JC66 00413A N WIN GEAR REGI IDLE JC66 00408A GEAR RDCN REGI JC66 00407A GEAR OPC DRV INNER JC66 00644A WASHER PLAIN 6031 001255 GEAR RDCN OPC JC
43. OUTFULL JC72 01310A CBF HARNESS OPE JB39 40532A STOPPER NETWORK JC61 00837A CAP WIRE POWER JC67 00058A COVER MOTOR BLDC JC63 00277A SCREW TAPTITE 6003 000008 SCREW TAPTITE 6003 000267 0 Service Manual EXPLODED VIEW amp PARTS LIST 8 2 Base Houshing Assembl Dine Screw 77 7 S WIT Service Manual EXPLODED VIEW amp PARTS LIST Base Houshing Assembly Parts List SA Service Available _____ O Service available X Service not available SEC Code Q ty SA Remark Description ELA HOU BASE HOUSHING JC96 02695P ELA UNIT COVER TOP JC96 02696L AS PBA LCD PNL_KB JC81 01731A KEY M BUTTON JC64 00082A PBA MAIN_LCD PANEL JC92 01473A KEY M CANCEL JC64 00083A CAP M LED JC67 00051A AS PBA OPEN_CAP JC81 01738A CAP M SENSOR JC67 00034B PBA SUB COVER OPEN JC92 01514A AS_UNIT COVER TOP JC81 01737A COVER M TOP JC63 00258A MEC BRUSH ANTISTATIC JC75 00095A PMO LEVER STACKING JC66 00646A BUSH M RETAINER JC61 00657A SPRING ETC DUPLEX COVER
44. RAY M LINK MP L JC63 00129B TRAY M LINK MP R JC63 00130B ELA UNIT CASSETTE 550 JC96 02687B ELA UNIT FRAME BASE JC96 02627C 220V ELA BASE JC96 02627D 110V ELA UNIT DEVE JC96 02851A 5 ELA UNIT DEVE JC96 02851C 10K ELA UNIT REGI JC96 02626A PBA MAIN CONTROLLER JC92 01487A Duplex PBA MAIN CONTROLLER JC92 01531A None Duplex ELA UNIT MOTOR MAIN CARDINAL JC96 02725B ELA UNIT MOTOR EXIT CARDINAL JC96 02857A ELA HOU SMPS HVPS V1 110V JC96 02779A ELA HOU SMPS HVPS V2 220V JC96 02777A A 220V MEA UNIT GUIDE FRONT DUP JC97 01715A GUIDE P FRONT DUP JC61 00660A LEVER M OPEN DUP JC66 00443A CBF HARNESS EARTH TX MOTOR JB39 00017A None N W Card BRACKET P_DUMMY CTRL JC61 00679A UNIT LSU_CARDINAL JC59 00019B BAR P_CROSS BOTTOM JC71 00042A PMO ACTUATOR EMPTY JC72 00991A FAN DC JC31 00029A STOPPER M FAN80 JC61 00667A GEAR TR29 JC66 00039A GEAR REGI Z25 JC66 00420A ROLLER TRANSFER JC66 00540A ELA UNIT HOLDER TR R JC96 01729A PMO TRANSFER HOLDER R JC72 41145C PMO BUSHING TR JC72 41142A SPRING ETC TR R HAWK JC61 00046A IPR PLATE TR JC70 11053A
45. ROM is mounted to a cartridge for distinguishing a choice developer Items written in below are detected by checking up memory information If the data of the EEP ROM is broken it cannot be detected 1 Detecting existence of a toner cartridge It detects whether a toner cartridge is mounted or not 2 Detecting a serial no of a developer If a serial no code is different with a supplying company Ws serial no it is not operated 3 Detecting a developer supplying company If it is not Samsung s it is not operated 4 Detecting page counter It detects the life span of a developer 5 Detecting an OPC rotating counter It detects the life span of an OPC drum uu 2 wire serial Toner Cartridge Main PBA Distinguish a refilled cartridge with eyes 1 Check whether One way screw is damaged or not 2 Check the page counter Print out the self test configuration Even though toner has left a lot a page counter is over 8K 7 8K It is suspected as a refilled cartridge Service Manual TROUBLESHOOTING 7 4 4 Error message LCD window related in a toner sensor It explains a message related in toner sensor in a LCD 7 4 4 1 Invalid Toner Contents It is displayed when a supplier is different between a developer and a set If this message is shown up a printing process cannot operate Solution Attach a suitable developer the same supplier s to a set A unique key has been applied 7 4 4 2 Low Ton
46. S amp lamp adjustment in the printing section AC Activates Lamp print 5V DC 3 3V DC Service Manual CIRCUIT DESCRIPTION 11 2 3 3 Circuit 1 AC Input and DC AC input unit is composed of FUSE VARISTOR NOISE CAPACITOR and LINE FILTER DC unit is composed of BRIDGE DIODE and ELECTRIC CAPACITOR The FUSE F1 has specification of 125V 8A for 110V and 250V 5A for 220V FUSE contains the function to prevent damage due to SMPS fire in the event of malfunction of 1 st PWM Control and parts causing excess voltage NOISE CAPACITOR is EMI counter part which is composed of CAPACITOR C1 C14 for the normal mode noise and CAPACITOR C3 C4 C9 C34 for common mode noise Larger the capacity of the CAPACITOR greater the NOISE absorption effect But adequate capacitor should be carefully selected since leakage current increases with the increased capacity in capacitor which has high potential of electric shock The Line Filter connected to the Capacitor has the EMI Noise eliminating function Especially the filter and the capacitor not only absorbs the noise being transferred out of the printer through power line it also absorbs the opposite noise coming from the exterior 2 SWITCHING Control Section SMPS is driven by OSC It has uniform switching frequency and the range of On Time Pulse may vary depending on the surrounding condition Basic operation procedure is as following Turn on the AC power
47. T 8 3 Frame Assembly 1 Service Manual EXPLODED VIEW amp PARTS LIST Frame Assembly 2 DIME Screw Service Manual EXPLODED VIEW amp PARTS LIST Frame Assembly Parts List NOE SA ServiceAvailable O Service available X Service not available Description SEC Code SA Remark ELA UNIT FRAME BASE JC96 02627C ELA UNIT FRAME BASE JC96 02627D FRAME M BASE JC61 00677A ELA UNIT PICKUP MP JC96 02681A SHAFT M PICK UP MP JC66 00453A PMO IDLE PICK UP MP JC72 01003A CAM M PICK UP MP JC66 00452A ELA UNIT ROLLER P UP MP JC96 02686A HOLDER M PICKUP MP JC61 00705A HOUSING M PICK UP MP JC61 00685A RUBBER PICK UP MP JC73 00131A IPR TERMINAL FU JC70 10961A PMO HOUSING TERMINAL JC72 41010A CBF HARNESS FUSER 220V JC39 00279A FOOT ML80 JC61 40001A AS HOLDER PAD JC81 01715A FRAME M HOLDER PAD JC61 00683A HOLDER M PAD JC61 00684A RPR FRICTION PAD MP JC73 00132A PMO ACTUATOR MP JC72 01002A SPRING ETC EMPTY JC61 70965A PHOTO INTERRUPTER 0604 001095 CBF HARNESS MP EMPTY JC39 00256A SPRING ETC PAD JC61 00387A GUIDE P TRANSFER JC61 00678A PMO HOLDER PLATE SAW JC72
48. TOR ERROR HSYNC ERROR is displayed in a LCD panel Check and Cause Solution 1 Check whether the LSU connector is disconnected or not 2 Check whether the LSU motor is rotating or not 3 Check the HSYNC signal Replace a LSU Replace a main board if the same error occurs again after replacing a LSU Service Manual TROUBLESHOOTING 7 3 3 Not function of the gear of the fuser due to melting away e Description motor breaks away from its place due to gear melting away Check and Cause Solution 1 Check the Heat Lamp 1 Replace the Fuser 2 Replace the Main PBA 2 Replace the SMPS 7 3 4 Paper Empty e Description paper lamp on the operator panel is on even when paper is loaded in the cassette Check and Cause Solution 1 Bending or deformation of the actuator of the paper sen 1 Replace the defective actuator SOr 2 The function of the engine board is defective 2 Replace the Sensor PBA 3 Check the Connector Service Manual TROUBLESHOOTING 7 3 5 Paper Empty without indication Description The paper lamp on the operator panel does not come on when the paper cassette is empty Check and Cause Solution 1 Bending or deformation of the actuator of the paper sen 1 Replace the defective actuator sor 2 The function of the engine board is defective 2 Replace the engine board 7 3 6 Cover Open Descript
49. UB OUT RETARD JC72 00993A RUBBER RETARD JC73 00129A SHAFT RETARD JC66 00590A SHAFT HUB IN JC66 00591A MEC BRUSH ANTISTATIC JC75 00095A SCREW TAPTITE 6003 000196 SHAFT M COUPLING RETARD JC66 00439A SHAFT M GEAR RETARD JC66 00438A GUIDE M FRONT JC61 00801A CAP FUSER FRAME JC67 00060A XX X lt X X X OK OK OK OK OK Service Manual 8 4 Fuser Assembl EXPLODED VIEW amp PARTS LIST Service Manual EXPLODED VIEW amp PARTS LIST Fuser Unit Assembly Parts List NOE SA ServiceAvailable O Service available X Service not available SEC Code SA Description Remark ELA UNIT FUSER JC81 01728A ELA UNIT FUSER JC81 01729A ELA UNIT UPPER FUSER JC96 02694A THERMISTOR NTC 1404 001305 SCREW MACHINE 6001 000131 SCREW TAPTITE 6003 000119 SCREW TAPTITE 6003 000196 NUT HEXAGON 6021 000222 SPRING TS 6107 001159 THERMOSTAT 150 JC47 00005A SPRING ETC SAPERATION JC61 70909A COVER M FUSER JC63 00110A IEX SHAFT IDLE F UP JC70 20901A ELECTRODE P FU M JC71 00039A ELECTRO
50. _V1 110V JC96 02779A EXPLODED VIEW amp PARTS LIST SA Service Available J n available X Service not available Q ty SA Remark ELA HOU SMPS HVPS V2 220V JC96 02777A SMPS V1_HVPS JC44 00052A SMPS V2_HVPS JC44 00053A MEA UNIT DUPLEX JC97 01714A GUIDE M LEFT DUP JC61 00664A GUIDE P BOTTOM DUP JC61 00661A MEA UNIT ROLLER FEED DUP JC97 01713A ICT STUD DRV GEAR DUP JC70 00327A GEAR DP DLE JC66 40911A SHAFT IDLE ROLL DUP JC66 00444A ROLLER M IDLE DUP JC66 00442A SPRING TS 6107 001156 SPRING ETC EMPTY JC61 70965A PMO ACTUATOR FEED DUP JC72 00997A PCT SILP WASHER JK72 00058A ICT STUD PAPER GUIDE DP JC70 00457A GUIDE M RIGHT DUP JC61 00662A BUSH M FEED DUP JC61 00665A GUIDE SKEW DUP JC61 00787A SCREW TAPTITE 6003 000266 SCREW TAPTITE 6003 000266 SCREW TAPTITE 6003 000266 DK OK OK OX OK Oxx 5 _ _ Service Manual 8 9 Cassette Assembl EXPLODED VIEW amp PARTS LIST Service Manual Cassette Assembly Parts List Description ELA UNIT CASSETTE 550 SEC
51. _______________ HO________ Input and Output a sync ______ synchronous or synchronization ______ USB ____ Universal Serial __________ IDE Intelligent Drive electronics or Imbedded Drive Electronics _______________ IEEE Institute of Electrical and Electronics Engineers Inc G2 Service Manual Reference Information 2 3 Selecting a Location Select a level stable place with adequate space for air circulation Allow extra space for opening covers and trays The area should be well ventilated and away from direct sunlight or sources of heat cold and humidi ty Do not set the printer close to the edge of your desk or table CLEARANCE SPACE Front 482 6 mm enough space so that trays can be removed Back 320 mm enough space to allow opening of the rear cover Right 100 mm Left 100 mm enough space for ventilation 320mm 12 6in T E E N 561mm 22in Service Manual Gs Specifications 3 Specifications Product specifications are subject to change without notice See below for product specifications 3 1 General Specifications Print Method Non impact Electro photography Development system Non Magnetic Mono Component Toner Transfer system Conductive roller transfer Fuser Unit Toner fix Pressure and Heating with Lamp Print Speed 24 PPM A4 size IDC 5 pattern 25 PPM Letter siz
52. abel special paper duplex unit and parts related to paper transferring 1 Separation method Separate it from the finger mounted to the cassette side guide and apply retard roller that uses a spring clutch A feed roller uses an electronic clutch to control driving power 2 Basic cassette It takes a center loading method and applies both side finger separating method It means that there is a paper sensor but a paper size is detected after detecting the first paper by software Both the side guide and the rear guide can be adjusted for for various types of papers from A5 to legal size paper It has a paper existence sensing function Capacity 500 sheets of general paper paper arranging function various size papers accepting function SCF paper path function and displaying function of paper remaining amount In the front side there is a paper level indicator 3 Pick up roller It has functions such as a paper pickup function driving control function paper feeding function and removing electronic static function 4 Retard roller It takes an arrangement method which uses a stopper roller and a weight without electric actuator It has paper separating function driving control function and multi feeding prevention function 6 Registration roller It has a paper arranging function paper transferring function paper detecting function jam removing function and so on 7 MP tray It has a paper arranging function paper transfer
53. al 6 CIRCUIT DESCRIPTION 20 Reliability Specification amp Descriptions MPBF 150 000 pages MTTR 30 min Remark 21 Toner Cartridge SAMSUNG Toner Cartridge 22 Expected Life Span 400 000 pages or 5 years whichever comes first A4 5 23 Operating Environment Temperature 10 32 5 Humidity 20 80 24 Storage Environment Temperature 20 40 c Packed Humidity 20 95 Packed 25 Weight Net Max 18kg 26 External Dimension 380 W X 412 D X 320 H mm 27 Toner Cartridge Life Span 596 Pattern Min 5 000 10 000 Sheets Developing Non magnetic Contact Developing Charging Conductive Roller Charging Density Adjustment Possible Transfer System Pre transfer By LED amp Pre transfer Lamp Conductive Roller Transfer Fusing System Temperature amp Pressure OZONE Emission Average 0 1ppm or less 8 Hours Negative PWM 28 Packing Main Kit Printer 1 Set Toner Cartridge 1 Piece Power Cord 1 Piece 3 Service Manual CIRCUIT DESCRIPTION 11 1 2 Quality Specification 1 Conditions Paper Specification amp Descriptions Core Media List 75g m Environment Temperature 15 25 C Temperature Humidity 40 60 2 Print Quality Optical Density 1 30 Temperature 15 25 After 1hr from Power O
54. alable ______ O Service available X Service not available Description SEC Code Q ty SA Remark ELA UNIT REGI JC96 02626A GUIDE P REGI LOWER JC61 00674A ROLLER REGI LOWER L JC66 00450A SHAFT REGI UPPER JC66 00446A ROLLER M REGI IDLE S JC66 00648A ROLLER M REGI IDLE L JC66 00647A SPRING TS 6107 001158 PMO ACTUATOR REGISHUTTER JC72 00998A 1 Oo O1 A Go PO GUIDE P_REGI PLATE JC61 00670A HOLDER M SENSOR JC61 00672A PHOTO INTERRUPTER 0604 001095 BUSH M ROLLER REGI L JC61 00668A RING E 6044 000231 BUSH M ROLLER REGI U JC61 00669A SPRING ES 6107 001155 CBF HARNESS MP EMPTY JC39 00256A WASHER PLAIN 6031 001255 CAP M WIRE PTL UPPER JC67 00035A CAP M_BUSHING ACTUATOR JC67 00047A CAP P_BUSHING REGI LOWER JC67 00038A PBA MAIN PTL1 JC92 01475A BRUSH ANTISTATIC JC75 00095A SCREW TAPTITE 6003 000196 5 l Bi po po a X gt lt gt lt gt lt gt lt gt lt X gt lt X X gt lt x gt lt gt lt x Service Manual EXPLODED VIEW amp PARTS LIST 8 8 SMPS Assembl 9 18 Service Manual SMPS Assembly Parts List Description ELA HOU SMPS_HVPS
55. and it controls data with CPU by UART method LCD back lite for supply needs 5V and logic for control needs 3 3V TXD and Reset signal are used Back lite is operated with 240mA and LCD dot is controlled by VEE voltage 11 2 4 13 SCF Circuit In SCF circuit 6 9MHz clock is supplied to 8bit CPU 4616 SCF circuit controls step motor solenoid clutch Regi clutch and paper size function amp empty function It operates with controller and SIO method PPS controls motor speed and it is downloaded to RAM to operate and control the circuit in controller U18 9 10 11 116 pin signal control signal make it to operate CIRCUIT DESCRIPTION 11 2 5 H V P S High Voltage Power Supply 11 2 5 1 Introduction HVPC applies DC 24V DC 5V which is used to form image in the electric photo development process of OA equipments It yields MHV SUPPLY DEV and THV 11 2 5 2 Electric Photo Process Electric photo process is widely used to the image creation features of copying machines laser beam printers and facsimiles It s process involves transferring exposing developing transferring and settling in respective order First form uniform electric charge of 800V on the surface of OPC with 1 380V adjusted through transfer roller The electrically charged OPC drum surface react to the image data from LSU which received print order based on the rotation and becomes exposed At this time the areas that are not exposed will maintain the
56. argin of the paper 11 2 2 2 Electric Charge This section charges uniform voltage to OPC When 1380V is charged to the Charge Roller OPC drum is evenly charged with approximately 800V This is the first stage of the electric photo creation 11 2 2 3 Exposure Unit LSU exposes OPC drum by turning Laser Diode On Off according to the digital data of the bitmap image data received from the controller board The voltage difference created at this point is shown above The exposed area to the laser is 150V which relatively increases the electric potential and forms charge ripple The areas that are not exposed to the laser due to no video data will maintain 800V As a result image black dot is created in the 150V area and the 800V area will show up white which creates the basic condition of image formation Unexposured Exposured Unexposured OPC Surface Service Manual CIRCUIT DESCRIPTION Engine Operating Description gt metering blade GND Develop Block HOST COMPUTER VIDEO CONTROLLER ENGINE CONTROLLER HSYNC FACE DOWN STACKER DEVELOPER A FEED SENSOR Fig1 System OPerating Structure Service Manual CIRCUIT DESCRIPTION Engine Operating Description gt LSU 4 Development A SENSOR SENSOR 6 Transfer 5 Pre Transfer Fig2 11 2 2 4 Development Section From the contact surface where OPC drum and the Developer Roller rotate in opposite direction Ton
57. at the printer is turned on and in ready mode with paper loaded in the tray 2 Press the Menu button amp on the control panel until you see Setup on the bottom line of the display 3 Press the Enter button amp to access the Menu 4 Press the scroll button Cor 9 until Maintenance displays on the bottom line and press the Enter button 69 5 Press the scroll button 9 or 9 to select the required option OPC Cleaning or Fuser Cleaning 6 Press the Enter button amp Your printer automatically picks up a sheet of paper from the tray and prints out a cleaning sheet with dust or toner particles on it Service Manual Alignment amp Adjustments 6 3 3 Checking the toner cartridge count Information about the toner cartridge count can be checked by printing the Configuration Sheet Cartridge Remaining Toner 70 OPC Count 25 Manufacture Date 2003 01 Supplier SAMSUNG Cartridge SN crum 03022740675 Cartrigde Capacity 8K 6 3 3 1 Remaining Toner xx Contents Shows the remaining amount of toner Description It starts with 10096 and it reduces every 5 unit until it becomes 0 A message Low Toner is displayed in a LCD when it reaches 1096 In a low toner status additional 800 sheets can be printed 5 coverage pattern standard 8K car tridge 6 3 3 2 OPC Count XXXXXX Contents It starts with 0 and increases to display count Description It is a
58. ata and the Font Rom which supports font in PCL6 operation Due to the variation of Flash and Font Rom by models basic control of 16Bit for Rom and 32Bit for Ram is necessary Domain of Flash Rom is divided into Boot and PGM PGM can be changed by download The storage RAM for the data download from PC is composed of 2MByte 2 11 2 4 9 DCU Interface Circuit DCU Diagnostic Control Unit tests the LBP and used as a tool in Trouble shooting and according to it s purpose Diagnostic code Normal Status code and Error Status code can be applied At this time Diagnostic Test takes place through DCU DIN signal and the Normal Error status check takes place through DCU DOUT signal DCU is the DCU clock input unit CLK Frequency approximately 17 6KHz 11 2 4 10 HVPS Interface Circuit HVPS Interface section is composed of various control areas When high voltage on signal is received from the engine CPU each high voltage turns on according to the electric photo process The signals that turn on the high voltage are DEV_PWM MHV_PWM THV PW M and the THV READ which feedback the results of transfer environment to the CPU CIRCUIT DESCRIPTION 11 2 4 11 PTL Circuit PTL circuit is located in the Video Controller Board and applies NPN type TR for drive 11 2 4 12 Panel Circuit Panel is consisted of 2 16 LCD with back lite 1 LED and 6 keys It has HT48C5A that is 8bit control MCU it supplies clock 7 37MHz
59. ay3 controller This Function is used to check the communication state between the main controller and the tray 3 controller 1 Press the Menu Key until finding Interface Test message on the panel 2 Press the Select Key when it s found Sub Menu Description Display LCD Tray3 Interface After it is on the test confirm a message on the panel Tray 2 I F PASS FAIL The I F is normal for the message PASS and abnormal for the message FAIL on the bottom line 6 1 2 2 Test Pattern and Paper path These Functions are considered to check the total print process state On the EDC mode a Test pattern is able to be printed While the printing job is processing the location of the paper is continuously displayed 1 Press the Menu Key until finding Test Pattern Print message on the panel 2 Press the Select Key when it s found 3 Confirm the message Choose a tray 1 default 1 4 Press the Arrow keys to select a tray you would like to choose 5 Fill a Tray 1 2 3 with papers 5 Press the Select Key if you would like to print it Sub Menu Description P Te Remark Test Pattern Print The test pattern is printed after the execution Pattern Print Example gt key is chosen and is displayed Location Pattern Print Press the Select Key for printing more Exit On the Cancel Key for stopping Location order Pick up a Feed On Exit O
60. consisted of a main motor for feeding and a developer and sub motors for fuser and duplex reverse turn 4 1 4 Fuser It is consisted of a heat lamp heat roller pressure roller thermistor and thermostat It sticks the toner on a paper by heat and pressure to complete the printing job 1 Thermostat When a heat lamp is overheated a Thermostat cuts off the main power to prevent over heating 3 Heat roller The heat roller transfers the heat from the heat lamp to apply a heat on the paper The surface of a heat roller is coated with Teflon so toner does not stick to the surface 4 Pressure roller A pressure roller mounted under a heat roller is made of a silicon resin and the surface also is coated with Teflon When a paper passes between a heat roller and a pressure roller toner adheres to the sur face of a paper permanently 5 Items for safety Protecting device for overheating 1st protection device Hardware cuts off when overheated 2nd protection device Software cuts off when overheated 8rd protection device Thermostat cuts off main power Safety device A fuser power is cut off when a front cover is opened Maintain a temperature of fuser cover s surface under 80 C for user and attach a caution label at where customer can see easily when customer open a rear cover 4 1 5 LSU Laser Scanner Unit It is the core part of the LBP which switches from the video data received to the controller to the electrosta
61. detects each size of fed papers in cassette and it arranges and manages data when printing distinguishes 8 kinds of paper by 3 switch combinations and it is consisted of 8 combinations of U18 106 107 108pin 8 Cassette Sensing micro switch By U27 K25pin cassette detecting function checks whether tray2 is open or not When Tray2 is open LCD panel displays error status 9 Toner Cartridge Sensing It controls memory data of EEPROM in developing unit by contacting to contacting point of joint board mounted to frame and it detects supplier manufacturing date toner remained amount lt writes and reads data by U27 A25 D23 J24 pin and operates with 2 WIRE bus method When toner remaining amount is 15 it displays low toner on LCD panel to inform toner cartridge detecting signal 3 Service Manual CIRCUIT DESCRIPTION 11 2 3 5 Output Control Circuit 1 Main Sub Fan Main Fan and Sub Fan are in take type Main Fan is off in sleep mode and Sub Fan operates when printing to control temperature of inside SMPS Main Fan is controlled by TR of Q10 by receiving signal from U18 18pin and Sub Fan becomes chopping by signal of U18 20pin and controlled by TR of Q12 2 Main Motor In initial set up stage Main motor s talk amount about operating load is set up as BLDC type It delivers power for feed device and operation device Fusing unit is operated by exit motor Main Motor has driver IC and supplies 24V 5V It sends S
62. e IDC 5 pattern Resolution True 600 X 600 DPI Addressable 1200 X 1200 DPI Source of Light Laser diode LSU Laser Scanner Unit Warm Up Time Power on boot 50 seconds or less First Print Time 12 seconds or less Feed Method Cassette amp Manual Option Feeder SCF Media Size 76mm 128mm 3 5 to 216mm 356mm 8 5 14 Media Thickness Cassette 16 28 Ib Manual 16 43lb Dimension W X D X H 386 X 436 X 326 mm Weight Net 18 Kg Gross 15 5 Kg Acoustic Noise Stand by Less than 35 dB Printing Less than 53 dB Sleep mode Background Noise Power save mode Enable Toner save mode Enable Consumption Parts Pick Up Roller 100 000 Pasges Transfer Roller 100 000 Pasges Fuser Assembly 100 000 Pasges Optional Parts SCF Paper Capacity 500 Sheets NIC Ethernet 10 100 base TX Protocols TCP IP SPX IPX Ethertalk SNMP HTTP1 1 DLC LLC 16MB RAM Buffer for faster graphics performance 2MB Flash Memory for upgrade Throughput 200 300K TCP IP SDRAM DIMM 16 32 64 128MB 100PIN SDRAM DIMM Postscript Flash ROM 4MB Service Manual G Specifications 3 2 Controller Specification ITEM DESCRIPTION Processor CPU ARM946E S CLOCK SPEED 166Mhz Memory FLASH ROM PROGRAM 2MB flash RAM 16MB Expandable to 144MB Option DIMM module 16 32 64 128MB SDRAM 100Pin SDRAM DIMM Samsung Printer Only EEPROM NVRAM 512byte Emulation PCL6 win 3 1 95 98 ME NT 2000 XP
63. e Manual Disassembly and Reassembly 6 Remove three screws and take out the Gear bracket 8 Take out the Heat Roller as shown below Gear Bracket 7 Remove two screws and divide the Fuser into two parts Heat Roller Fs Bushing 9 Take out the Pressure Roller as shown below Pressure Roller Service Manual Disassembly and Reassembly 5 17 Exit Drive 3 Take out the Cover Motor BLDC after remove 1 Before you remove the Exit Driver you should tow screws and take out the Exit Driver Ass y after remove three screws remove Top Cover Refer to the 5 13 Cover Motor BLDC PBA 2 Unplug the Exit Driver Harness from the Main 4 Remove two screws and take out the Exit Motor Exit Motor S 3 5 m gt S v Duplex Exit Roller A Exit Gear Ry 4 Take out the Exit Gear as shown below 5 Take out the Duplex Exit Roller as same method Bearing cry o 4 1 Before you remove the Exit Roller you should 3 Remove the Exit Roller and Bearing as shown NS 4 E AN 7 2 i N A N 2 a 9 5 5 da o 5 2 8 x 2 c
64. e Manual Disassembly and Reassembly 5 11 DC Fan 3 Remove one screw for taking out the Stopper 1 Before you remove the DC Fan you should remove and then take out the DC Fan DC Fan Stopper RH Cover Refer to the 5 5 LH Cover Refer to the 5 10 2 Unplug the two Connectors from the Connector PBA 4 Remove one screw for taking out the Stopper and then take out the Fan DC_Fan Service Manual Disassembly and Reassembly 5 12 Rear Cover 2 Remove the Rear Cover in the direction of 1 Open the Rear Cover and then take out the arrow Stopper Rear Cover S gt I Service Manual Disassembly and Reassembly 4 Unlatch both ends of the Top Cover 1 Before you remove the Top Cover you should 5 13 Top Cover LCD Panel Service Manual and then take out the LCD Key Panel Panel and the Key Panel 5 Unlatch the hook and take out the Top Cover 6 Remove 7 screws RH Cover Refer to the 5 5 LH Cover Refer to the 5 10 remove aa Panel 2r a 4 4
65. e the LSU Unit or Main PBA Service Manual TROUBLESHOOTING 7 1 7 Uneven Density Description Print density is uneven between left and right Check and Cause Solution Digital Printer Digital Printer 1 The pressure force on the left and right 1 Replace both the left and right Spring bd springs of the transfer roller is not even Holder Digital Printer the springs are damaged the transfer Digita Printer roller is improperly installed or the trans Digita Printer fer roller bushing or holder is damaged 2 The life of the Toner cartridge has 2 Occur in the toner cartridge replace the expired toner cartridge and try to print out 3 The toner level is not even on the toner cartridge roller due to the bad blade 7 1 8 Background e Description Light dark background appears in whole area of the printing Check and Cause Solution Digital Printer Digital Printer 1 Does character exist less than 296 1 The toner cartridge is basically per page and hasn t it been used designed to print 8 000 sheets with Digital Printer long time 596 image If it prints more than Digital Printer 12 000 sheets with 296 coverage a Digital Printer background can occur 2 The B S is not guaranteed if using a 2 Is a recycled toner cartridge be recycled the toner cartridge used 3 Has the life span of the toner car 3 Replace the toner cartridge when the tridge e
66. e transfer voltage is abnor mal 1 In case of 1 above Run OPC Cleaning Mode Print 4 5 times repeatedly to remove Especially check foreign sub stance on the OPC surface then remove them with a clean gauze moistened with IPA Isopropyl Alcohol not to damage OPC if necessary Never use usual alcohol In case of 2 If they are not disappeared by running OPC Cleaning Mode Print 4 5 times at intervals of 38 5mm Replace the toner cartridge at intervals of 96mm Remove foreign substance Broken image Replace the toner cartridge according to carelessness In case of 3 Exchange the transfer roller because the life of the transfer roller in use has been expired Check the transfer volt age and readjust if different Recycled product Poor appearance of the toner cartridge Unclean and rough printouts Bad background in the image 1 Poor appearance of the toner cartridge 1 Check the damage to label and whether different materi als are used 2 Check the appearance of parts of the toner cartridge such as frame hopper 2 Unclean and rough printouts 1 Check whether foreign sub stance or toner are stuck to the terminal contact point of the toner cartridge 2 Check whether the state of the terminal assembly is nor mal 1 2 In case of 1 1 If there is an evidence of disas sembling the toner cartridge 2 materials other tha
67. ecifications gt gt Input Paper Size A4 210 X 297 mm Letter 216 X 279 8 5 X 11 Folio Legal13 216 X 330 8 5 X 13 Legal Legal14 216 X 356 8 5 X14 Executive 184 X 267 7 25 X10 5 Statement 140 X 216 5 5 x8 5 ISO B5 176 X 250 JIS B5 182 X257 5 148 5 X 210 6 105 148 5 Com 10 Envelope 105 X 241 4 15 X 9 5 Monarch Envelope 98 X191 3 87 X 7 5 DL Envelope 110 X 220 4 33 X 8 66 C5 Envelope 162 X 229 6 38 X 9 01 C6 Envelope 114 X 162 4 49 X 6 38 Transparency OHP A4 or Letter Label paper A4 or Letter gt gt Input capacity Cassette 550 sheets MP tray Paper 100 sheets Transparencies 25 sheets Envelopes 10 sheets Labels 25 sheets Option Cassette 500 sheets Output capacity Face Down 250 sheets Face UP 100 sheets Service Manual Specifications Memo Service Manual Summary of product 4 Summary of Product This chapter describes the functions and operating principal of the main component 4 1 System Layout Cassette LSU o Duplex Unit o Fuser ver Main Motor Toner Cartridge Exit Motor Service Manual 4 1 1 Feeding It is consists of a basic cassette an MP tray for supplying different types of media envelope l
68. ed by the procedure must be restored as close as possible to their original positions Before remov ing any component from the machine note the cable routing that will be affected Whenever servicing the machine you must perform as follows 1 Check to verify that documents are not stored in memory 2 Be sure to remove the toner cartridge before you disassemble parts 3 Unplug the power cord 4 Use a flat and clean surface 5 Replace only with authorized components 6 Do not force plastic material components 7 Make sure all components are in their proper position Releasing Plastic Latches Many of the parts are held in place with plastic latches The latches break easily release them carefully To remove such parts press the hook end of the latch away from the part to which it is latched Service Manual E Disassembly and Reassembly 5 2 Transfer Roller 1 Open the Open Cover 2 Hold the lever at both ends of the roller then remove the roller Transfer Roller lt Cautions When Replacing a Transfer Roller gt Do not grab the transfer roller shown in picture A It may cause a malfunction due to a foreign object Hold the both sides of the transfer roller shown in picture B when replacing it Service Manual 5 3 MPF Ass y 1 Open the MPF Ass y Disassemb
69. ed of rectifier circuit When THV EA LOW signal is applied Q300 and Q301 turn on Base voltage of Q302 becomes ground voltage and it is turned off to prevent to create high voltage C209 2 6 221 D201 1N4148 ICt05 A Dag mm 8 gt gt ekv skv C210 4 V 1 R205 22K 6kv221 R212 RDS1 2W100K C202 D203 102 DINL20U 1 0202 A201 7D431K Ez 70431 5 R213 BLR1 2W30MF R305 z EESUTT 2 5 1 i Q302 C2383 DINEAOU R304 ma Ic105 8 Service Manual 3 CIRCUIT DESCRIPTION 11 4 4 Environment THV voltage recognizes the change in the transfer roller environment and then supplies optimum voltage for the environment to create optimum image Analog data is converted to digital by the environment sensor of the transfer roller According to such digital output stored in the program in the engine controller Rom and with the consideration of the paper type printing environment optimum transfer voltage is supplied The environment recognition setting for the ML 6000 series is as following First set the THV standard voltage Then set the 800V standard voltage by using VR201 which has 2008 supplied in the output section Next set the standard CPU index value to 80 using VR302 This is to set the CPU standard of feedback current t
70. eedback control 600V 1200V Error type An error due to contamination of toner on a backside of printing paper 4 Developing voltage DEV Function It is a voltage that develops toner with electronic potential difference of the section exposed by LSU Laser Scanning Unit When printing exposing voltage of OPC is 250V and exposing voltage of DEV is 470V Therefore toner with polarity is developed on an exposed section Output voltage 400V 470DC 20V Error type If DEV is GND a density gets extremely low b When DEV is floating due to instable of terminal s contacting point and etc density gets extremely high 5 Supplying voltage SUP Function It is a voltage that supplies toner to a developing roller Output voltage 580V 650V DC 50V Use AENER Gearing of DEV 180V more than DEV Error type a When SUP is GND density gets extremely low b If SUP is floating due to instable of terminal s contacting point and etc density gets extremely low that it is hard to catch up with eyes 6 OPC Ground ZENER voltage Function It is a voltage to prevent an image contamination under the condition of low temperature and low humidity environment When set prints without an output voltage 100V is maintained on OPC ground 100V AENER diode is connected to OPC ground Error type When ZENER diode is OV there is no serious image problem in general environment but in low tem
71. entered but it cannot reach to the feed sensor in certain time due to slip etc After picking up if the feed sensor is not on repack up After repacking up if the feed sensor is not on after certain time it is Jam O t is a status that the leading edge of the paper doesn t pass the feed sensor Even though the paper reaches to the feed sensor the feed sensor doesn t turn on t is a status that the leading edge of the paper already passed the feed sensor 4 4 1 2 Jam 1 After the leading edge of the paper passes the feed sensor the tailing edge of the paper cannot pass the feed sensor after certain time The feed sensor cannot be Off After the leading edge of the paper passes the feed sensor the paper cannot reach the exit sensor after certain time The exit sensor cannot be On The paper exists between the feed sensor and the exit sensor 4 4 1 3 Jam 2 After the tailing edge of the paper passes the feed sensor the paper cannot pass the exit sensor after certain time 4 4 1 4 Duplex Jam 1 A leading edge of a paper didn t reach a Duplex Sensor after certain time passes 4 4 1 5 Duplex Jam 2 After a leading edge of the paper passes the Duplex Sensor the rear edge of the paper does not pass a Duplex Sensor within a certain time 4 4 2 Drive A main motor BLDC drives a feeding and developing unit and an exit motor Step drives a Fuser and an Exit ass y When printing with a duplex function it rotates the
72. er Contents This message shows up when a message remaining toner 10 is displayed in a cartridge count informa tion And the same message shows up when an OPC count becomes 18 000 page Solution It means that a toner in the developer has been almost ended Replace the developer 7 4 4 3 Replace Cartridge Contents This message shows up when an OPC count becomes 20 000 pages It means the life span of a toner cartridge except a toner part has been ended Even though a case that a toner is refilled the rest of major parts have been ended so entire toner cartridge might be replaced Solution If an OPC rotates about 20 000 page in a worst case a toner overflows and it may cause a system fail Therefore recommend a user to replace a developer When continuously using even though a count reach es to 20 000 pages a printed image becomes misty and an on line key that is flashing on a set must be pressed for a single print Service Manual 7 4 5 Signs and Measures at Poor toner cartridge Fault Signs Cause amp Check TROUBLESHOOTING Solution Light image and partially blank image The life is ended The printed image is light or unclean and untidy Some part of the image is not print ed Periodically a noise as tick tick occurs 1 If the image is light or unclean and untidy printed image Shake the toner cartridge and then recheck 1 NG Check the weight of the
73. er Video Controller without RET Algorithm e HPVC Printer Video Controller with RET algorithm Line Memory amp Lookup Table Memory 512 x 8 4096 x 16 Engine Controller Motor Control Unit Motor Speed Lookup Table Memory 128 x 16 x 2 Pulse Width Modulation Unit 4 Channels are supported ADC Interface Unit 3 Channels are available ADC Core ADC8MUX8 maximum clock frequency 3 MHz USB 2 0 Interface Package 272 pins PBGA Power 1 8V Core 3 3V IO power operation Speed 166MHz core ARM946ES operation 60MHz bus operation Service Manual 4 2 1 1 SPGPm Internal Block Diagram EXTERNAL DMA CONTROLLER ROM CONTROLLER SFR BUS INTERFACE HPVC 512x8 4096x16 UART 3CH ENGINE CONTROLLER LSU I F PULSE WIDTH MODULATOR MOT OR CONTROLLER 128x16 x2 ADC 3CH PARALLEL PORT INTERFACE MISC CONTROLLER EPI ENGINE Comm I F INTERRUPT CTRL 5CH TIME CONTROL UNIT Summary of product ARM946E S CORE 16KB ICACHE 16KB DCACHE USB2 0 AHB BUS Ji SYSTEM BUS INTERFACE SYSTEM BUS DECODER CLOCK amp RESET GENERATOR SYSTEM PLL 120MHz ARBITER SDRAM CONTROLLER 5CH gCODEC GRAPHIC EXECUTION UNIT ROTATOR SCALER HALFTONER 1024x8 256x8x 4 Service Manual 4 2 2 Memory part Flash Memory It stores the System Program Capacity 2M Byte Access Time 70 nsec gt gt SDRAM It is used as
74. er section The toner on the OPC drum surface is transferred to the paper surface by transfer roller The toner on the OPC drum surface receives hundreds up to thousands of volts from HVPS and transferred to the paper surface since the voltage is larger than the toner on the OPC The toner with weak static energy settles on the paper by pressure and heat from the pressure roller and heat roller The printing process is completed when the pressure from the pressure roller and the heat from the heat roller forces the melted toner to settle the image on the paper surface and the paper exits the printer Service Manual CIRCUIT DESCRIPTION 11 3 1 Introduction HVPC applies DC 24V DC 5V which is used to form image in the electric photo development process of OA equipments It yields MHV SUPPLY DEV and THV Each high pressure output indicate the voltage required for the electric photo process 11 3 2 Electric Photo Process Electric photo process is widely used to the image creation features of copying machines laser beam printers and facsimiles It s process involves transferring exposing developing transferring and settling in respective order LSU SUPPLY DEV SUPPLY ROLLER DEVELOP ROLLER HEATER ROLLER TRANSFER re ROLLER Paper Transfer Direction PRESSURE ROLLER TRANSFER ROLLER First form uniform electric charge of 800V on the surface of OPC with 1 380V adjusted through
75. er with it s electric characteristics transfers to the exposed part 150V of the OPC drum due to the electric potential difference But the areas not exposed 800V do not transfer 11 2 2 5 Transfer Section Max 4 1KV The toner from the surface of the OPC drum is transferred to the paper by the transfer roller In other words the toner from the surface of the OPC drum is transferred by the transfer roller charged with approximately 1 0kV 300 4100V adjustable At this time the adjustable voltage of 300 4100V is decided by the temperature and humidity This process is called transfer Service Manual CIRCUIT DESCRIPTION 11 2 2 6 Printing Section The toner on the surface of a paper which passed the transfer section is at a low electric state Therefore it can easily spread At this point high temperature of 180 C and pressure of 4 5 Kg are applied to permanently stick the toner to the paper The resulted image remains permanently The heat roller transfers the heat from the internal heat lamp to the surface to apply the heat to the paper that passes the surface The melted toner due to the heat does not stay on the surface of the Teflon coated heat roller The pressure roller located on the bottom of the heat roller is made from Silicon Resin and it s surface is also coated with Teflon The thermistor of the printing section senses the temperature of the heat roller and feedback the information to maintain 185 C during pr
76. falls below the level of maintaining current In other words it cannot be turned off by counter current as that of SCR Such characteristics is categorized as Critical Rigging Time Rate Commutation dv dt In the application of electric power exchange Triac either turns off the activation or switches twice in each period at Zero Crossing Such switching movement is called Commutation It is able to turn off the triac at the end of the half period by deleting the Gate signal It is possible when the level of IL current is below the level of maintaining current When the Triac commutation is Off the voltage will instantly change to opposite direction and the VAC will increase to the maximum level At this time the range of increase rate is decided by dv dt and the Overshoot voltage is decided by the circuit Also the voltage of Triac will have same level of voltage when the commutation of Triac is Off Service Manual CIRCUIT DESCRIPTION 11 2 3 4 Sensor Input Circuit 1 Paper Empty Sensing The Paper Empty Sensor Photo Interrupter which is located in the Engine Board informs the CPU the status of paper volume through the operation of actuator fixed on the frame If there is no paper in the Cassette it notifies the second LED yellow of the panel LED by reading the 103 of U18 2 Paper Feeding Sensing When the fed paper passes through the actuator of the feed sensor it notifies that the paper is being tran
77. fer roller is contaminated run PC Digital Printer on the face of page will occur Cleaning Mode Print 2 or 3 times And perform Self Test 2 or 3 times to remove contamination Service Manual TROUBLESHOOTING 7 1 13 Satins on Back of Page e Description back of the is stained at 57 or 92 mm intervals a Check and Cause Solution Digital Printer 1 57mm Transfer roller is contaminated 1 Perform the OPC Cleaning Mode Print 2 or 3 times Run Self Test to remove the conta mination of the transfer roller Digital Printer 26 10 28 Digital Printer 2 92mm Pressure roller is contaminated 2 Replace the transfer roller if contaminated severely 3 Disassemble the fuser and clean the H R Heat Roller and P R Pressure roller And check the area between H R and Thermistor If contaminated clean the area not to be deformed 7 1 14 Blank Page Print out 1 e Description Blank page is printed Check and Cause Solution Bad ground contacts in OPC and or toner Remove contamination of the terminals of the cartridge toner cartridge and the unit 7 1 15 Blank Page Print out 2 1 Blank page is printed Description 2 One or several blank pages are printed 3 When the printer turns on several blank pages print Check and Cause Solution 1 Bad ground contacts in OPC and or toner
78. g Roller LSU 0 16mW 1 5KV Vo 750V 3 Vi 150V Charging Roller Q Cleaning Blade Supply Roller jc Zener Diode 100V Max 4 2kV Transfer Roller lt Toner Cartridge Layout gt Service Manual Summary of product 4 2 Main Board Main controller part is organized with Asic SPGPm part Memory part and Engine interface part and it is functions as a Bus control handling Drivers and PC interface by CPU Memory access has program memory supports 16bit operation and working memory supports 32bit operation PTL CON CN15 ENGINE P AB CON CN18 DC MOT OR CON CN19 CU CON CN9 COVER OPEN SENSOR CON CN1 JOINT PBA CON CN16 m FAN CON CN13 DEBUG CN17 LSU CON CN6 SDRAM SLOT NETWORK CARD SLOT D MOT OR CON CN14 CAR TRIDGE CON CN5 PANEL CON CN10 0804 ROM SLOT P1284 PORT SCF CON CN1 USB PORT Service Manual 4 21 ASIC SPGPm ARM946ES 32 bit RISC embedded processor core 16KB instruction cache and 16KB data cache No Tightly Coupled Memory Memory Protection Unit amp CP15 control program Dual bus architecture for bus traffic distribution AMBA High performance Bus AHB System Bus with SDRAM IEEE1284 compliant parallel port interface Printer Video Controller for LBP engines Graphic Execution Unit for Banding support of Printer Languages Printer Video Controller for LBP engines PVC Print
79. gainst the paper particles and foreign matter in order not to cause the trouble 2 Service Manual 7 1 5 Light Image TROUBLESHOOTING e Description The printed image is light with no ghost Check and Cause Solution 1 Develop roller is stained when the toner of toner cartridge is almost consumed 2 Ambient temperature is below than 10 C 3 Bad contact caused by the toner stains between the high voltage terminal in the HVPS and the one in the set 4 Abnormal output from the HVPS Run self test and check 1 4 7 1 6 Dark Image or a Black Page 1 Check if the Toner Save mode is off 2 No 1 Replace the toner cartridge and try to print out 3 No 2 Wait 30 minutes after printer is pow ered on before you start printing 4 No3 Clean up the contaminated area by the toner 5 Replace the HVPS if the problems are not solved by the above four instructions Description printed image is dark Check and Cause Solution 1 No charge voltage in the engine board 2 Charge voltage is not turned on due to the bad contacts between power supply in the side of the Toner cartridge and charge terminal of HVPS 3 VDO signal of the Main PBA is Low state 1 Clean the high voltage charge terminal 2 Check the state of the connector which connects the engine board and HVPS 3 Replace the HVPS if not solved by the above direction 1 and 2 4 Replac
80. h a network Check on a Webthru Setup Menu remaining toner Caution 1 Please be careful not to damage a toner sensor part when assembling and disassembling a developer 2 Please be careful not to stain any thing to jumper 4 which is shown in the picture Jumper Alignment amp Adjustments Service Manual Alignment amp Adjustments 6 4 Consumables and Replacement Parts The cycle period outlined below is a general guideline for maintenance The example list is for an average usage of 50 transmitted and received documents per day Environmental conditions and actual use will vary these factors The cycle period given below is for reference only COMPONENT REPLACEMENT CYCLE Pick up Roller 100 000 Pages Paper Feeding Roller Friction Pad 100 000 Pages Transfer Roller 100 000 Pages Fuser 100 000 Pages Toner Cartridge Normal cartridge 8 000 Pages A4 5 Pattern Starter cartridge 4 000 Pages A4 5 Pattern Service Manual Alignment 4 Adjustments 6 5 Periodic Defective Image If the delinquent image regularly occurs in the printed paper it is due to delinquent or damaged roller Refer to the table in below and check the condition of the roller No Roller Defective image Typical defect 1 OPC Drum 95 mm white spot on black image or black spot 2 Charge Roller 38 mm black spot 3 Supply Roller 45mm light or dark horizontal image band 4 Developing Roller 49 m
81. he cable replaced check the amount of the remaining tone refer to Toner Cartridge Service 4 5 3 Printing is nor working in the Windows 3 Check if the connection between PC and printer port is proper If you use windows check if the printer dri ver in the controller is set up If the printer driver is properly set up check in which program the printing is not working The best way to find out is to open the memo pad to check the function of printing If it is not working in a certain program adjust the setup the program requires Sometimes the printout is normal within the Windows basic programs but it s not work ing in a particular program In such case install the new driver again If not working in the Windows basic program Check the setup of the port of CMOS is on ECP And check the address of IRQ 7 and 378 4 If the scanner needs to be connected to the printer 4 Check if the printer cable is directly connected to periph first the remove the scanner from the PC to see if the eral devices printer is properly working alone Service Manual TROUBLESHOOTING 7 5 2 The printer is not working 2 After receiving the printing order no response at all or the low speed of printing Description i UM P occurs due to wrong setup of the environment rather than malfunction of the printer itself Check and Cause Solution 1 Secure more space of the hard disk 1 Not working with the message insufficien
82. he fixed unit 11 2 1 3 Engine Board SMPS Engine Board uses the voltage received from SMPS to control electric photo process which is the basic operation principle of LBP Detailed explanation on each composition elements are in the section 2 4 Engine Controller 11 2 1 4 HVPS Board HVPS board creates optimum image formation condition by supplying High Voltage from THV MHV Supply Dev to the developer 11 2 1 5 Develop Unit Develop unit creates image using electric photo process This unit consists of Charge Roller OPC drum Developer Roller Supply Roller and Toner 11 2 1 6 LSU Laser Scanning Unit LSU is controlled by Video Controller It is the core part that forms charge ripple at the OPC drum by applying video data from the video controller exposure from OPC drum and the rotation principle of polygon mirror OPC drum synchronously rotates with the paper feeding speed At this point when the laser beam within the LSU reaches the edge of the polygon mirror HSYNC signal is sent to the engine The engine then detects the HSYNC signal and properly adjust the vertical image lines of the paper The image data is sent to the LSU at the set time followed by HSYNC signal detection to adjust the left margin It becomes one of the lines scanned by one side of polygon mirror 11 2 1 7 Transfer Section Transfer unit is composed of PTL Pre Transfer Lamp and Transfer Roller PTL investigates Beam from OPC drum and decreases the electric potent
83. he fuser whether it is 2 If there is heavy background repair it by the deformed background troubleshooting method 3 Clean the surface of the heat roller with IPA or water 4 Check the warp or separation of the print claw and the holder plate claw and then manage it Service Manual TROUBLESHOOTING 7 2 9 Paper rolled on the OPC Drum e Description Paper is rolled up in the OPC Check and Cause Solution 1 Paper is too much thin 1 Recommend to use normal paper 2 The face of paper is curled 2 How to remove the rolled paper in the OPC Remove the paper while turning the OPC against the ongoing direction Clean fingerprints on the OPC softly with soft cloth dampened with tissue Service Manual TROUBLESHOOTING 7 3 The cause and solution of the malfunction 7 3 1 Fuser Error e Description message Open fuser Over heat Low heat is displayed in a LCD panel Check and Cause Solution 1 Check whether a thermostat AC wire and heat lamp are open or not 2 Check whether a thermistor is open or not 3 Heat lamp ON OFF test 4 It could not operate due to a gear of a fuser is melted 7 3 2 LSU Error Replace the fuser if a thermostat is open Replace the fuser if a thermistor sensor is located deep inside of a sponge Check whether the overheat mode circuit operates normally or not Replace the fuser Description message PMO
84. he paper tray out of the printer 2 Pull down the metal plate inside of the printer CAUTION Pulling the plate could cause an injury Use the lever on the left 3 Remove the jammed paper 4 Slide the tray back into the printer 5 Open and close the top cover Printing can be resumed Service Manual Alignment 4 Adjustments 6 3 Sample Pattern This product has the several sample patterns for maintenance With the sample patterns check the existence of the abnor mality The patterns help to regularly maintain the product 6 3 1 Printing a Demo Page Print a demo page to make sure that the printer is operating correctly 1 Press the Menu button on the control panel until you see Information on the bottom line of the display 2 Press the Enter button G9 to access the Menu 3 Press the scroll button or until you see Demo Page on the bottom line 4 Press the Enter button amp A demo page showing the printer s features and capabilities prints out 6 3 2 Printing a cleaning sheet If you are experiencing blurred faded or smeared printouts you can clear the problem by printing a cleaning sheet provid ed by your printer You can print OPC Cleaning sheet cleans the OPC drum of the toner cartridge Fuser Cleaning sheet cleans the fuser unit inside the printer This process will produce a page with toner debris which should be discarded 1 Ensure th
85. ial and the toner adhesion to increase the transfer efficiency The transfer roller transfers the toner from the OPC drum to the paper surface 11 2 1 8 Printing Section Printing unit is composed of Heat Lamp Heat Roller Pressure Roller Thermistor and Thermostat Printing unit completes the printing job by applying toner from the transfer unit with pressure and high temperature to stick to the paper 11 2 1 9 Driving Section Driving unit applies Bi Polar Motor and controls current in 2 2 11 2 1 10 Cover Open Board Cover Open board has Cover Open Sensing unit which shuts off Main Motor LSU Fan Clutch and 24 when the front cover is opened 11 2 1 11 Toner Sensor Board Toner Sensor board transfers various signals Cartridge detect paper detect paper size detect etc 11 2 1 12 Cassette Detect Board Various signals Feed Clutch MP empty Cassette detect connect to the Video Controller Board through the Cassette Detect Board Service Manual CIRCUIT DESCRIPTION 11 2 2 Development Process 11 2 2 1 Paper Feed Paper feed unit is operated by the engine and solenoid rotates the feed roller to feed one sheet of paper The paper then moves on to the set and hits the actuator of the feed sensor The engine at this time detects that signal and prepare to spread the the image data If problems occurs in the feed sensor Paper Jam Error will appear in the OP panel The feed sensor section is also closely related to the top m
86. iately 5 Do not touch the power plug with wet hands When servicing do remove the power plug from outlet And do not insert or take off it with wet hands Electric shock can be occur 6 Caution when inserting or taking off the power plug The power plug has to be inserted completely If not a fire can be caused due to poor contact When taking off the power plug do grip the plug and take it off If grip the line and pull over it could be damaged This could cuase a fire or electric shock 7 Management of power cord Do not bend twist or bind it and place other materials on it Also do not fix it with staples If the power cord gets damage a fire or electric shock can be caused A damaged power cord must be replaced immediately Do not repair the damaged part and reuse it A repaired part with plastic tape can be occurred a fire or electric shock Do not spread chemicals on the power cord Do not spread insecticide on the power cord A fire or electric shock can be occurred due to thinner weak cover of the power cord 8 Check whether the power outlet and the power plug are damaged pressed chopped or on fire When such poor conditions are found repair it immediately Avoid pressure or cut when moving the machine 9 Caution when thundering and being flash of lightening It causes a fire or electric shock Take the power plug off when thundering Do not touch cable and device when thundering and being flash of lightening 10 Avoid
87. inting mode and 175 C at standby mode The thermostat used as secondary safety feature prevents overheat by turning off the main power when the heat lamp is overheated Thermistor Heat Lamp Heat Roller Pressure Roller 11 2 2 7 Exit The paper that completed the electric photo process exits the printer through the Exit Sensor The detected signal is then sent to the engine to inform the location of the paper When the actuator and senor mal functions Paper Jam 2 error will be displayed Service Manual CIRCUIT DESCRIPTION 11 2 3 Engine SMPS Section SMPS Switching Mode Power Supply is the PWM Pulse Width Modulation method of power supply unit that supplies DC 3 3V DC 5Vand DC 24V to the engine and DC 3 3V DC 5V to the video controller and the assembly panel It also supplies AC voltage to the heat lamp of the printing section 11 2 3 1 SMPS Specification Specification AC input voltage Europe America minimum 198V 90V optimum 230V 120V maximum 264V 132V max input AC current 2Arms 5Arms max Inrush current 50 Ap p at 25 C Line Regulation 24V 10 5 3 3V 5 Output Ripple Noise 24V 500mVp p DC 5V 100mVp p 3 3V 100mVp p Over Current Protect 24V 5 0 11 2 3 2 Power Supply Section of SMPS Output Application Remark Board Logic section of engine Panel Video Controller Board amp Video Controller board LSU Laser Main Motor Solenoid LSU Motor 24V DC HVP
88. ion The ERROR lamp is on even when the print cover is closed Check and Cause Solution 1 The hook lever in the top cover may be defective 1 Replace the hook lever if defective 2 Check the connector and circuit of the cover switch 2 Check the insertion of the Cover Open S W department in the Main Control board Connect 3 Replace the Main Control board or Cover Open S W Service Manual TROUBLESHOOTING 7 3 7 No error message when the cover is open Description The ERROR message does not come on even when the printer cover is open Check and Cause Solution 1 Check the connector and circuit of the cover switch department in the Main Control board Perform EDC mode 1 Check the insertion of the Cover Open S W Connect 2 Replace the Main Control board or Cover Open S W Service Manual 7 3 8 Defective motor operation TROUBLESHOOTING Description Main motor is not driving when printing and paper does not feed into the printer resulting Jam O Check and Cause Solution 1 The Motor harness or Motor PCB may be defective 2 Check the motor operation in the EDC Mode 7 3 9 No Power 1 Check the motor harness replace it if defective 2 Replace the Main PBA Description When system power is turned on all lamps on the operator panel do not come on Check and Cause Solution 1 Check if the power input and SMPS
89. ion or jam infor mation is informed to the CPU The paper 2 is informed Displays the state on LCD panel 4 2 6 6 Cover Open Sensing The Cover open sensor is located on the front cover After the front cover is opened 24 and 5 DC fan solenoid main motor polygon motor part of LSU HVPS LSU Laser diode which is supplied to each unit is cut off 4 2 6 7 DC FAN Solenoid Driving Circuit A fan driving circuit is driven by a transistor and a controller which is in the CPU It is automatically turned off when a machine turns to sleep mode There are two solenoids and it is driven by an MP signal and a paper pick up signal 4 2 6 8 Motor Driving Circuit A main motor BLDC drives a feeding and developing unit and an exit motor Step drives a Fuser and an Exit ass y When printing with a duplex function it rotates the Exit Motor to a normal reverse direction It controls by dividing the acceleration section standard speed section and reducing speed section A BLDC Motor is operated by a clock and enable signal and a Step Motor is managed with an AN8495 driver IC Service Manual 4 3 SMPS amp HVPS board The SMPS and HVPS are in one united board The SMPS part supplies the DC power to the system It takes either 110V or 220V and outputs the 3 3V and 24 to supply the power to the main board The HVPS part creates the high voltage of THV MHV Supply Dev and supplies it to the developer part for making the bes
90. lied after Transfer 1000 Value ADC value the execution key is chosen and it stops when displayed the stop key is chosen Transfer Test Transfer negative voltage 600 1000 V is Transfer On Off Voltage in supplied after the execution key is chosen and it the range stops when the stop key is chosen PTL Test PTL Pre Transfer Lamp is on after the execution PTL On Off key is chosen and it stops when the stop key is chosen 6 1 2 7 Developing Test Item Fuser Laser Scanning Unit These Functions are used to check whether functions related to the development are normal or not Fuser OPC LSU 1 Press the Menu Key until finding Developing Test is displayed on the panel 2 Press the Select Key when it s found 3 Press the arrow keys gt until finding a suitable function Refer to the table below 4 Press the Select Key when it s found 5 Press the Select Key for execution or the Cancel key for stop Sub Menu Description Display LCD Remarks Setting Temperature When Temp is displayed Input a temperature Temperature Test T target value you would like to set with the arrow keys lt q C ijcurrent value It will be displayed on the bottom line on off Laser Diode Test Diode On is displayed when the laser diode is on Ld On Off On the other case Diode Off is displayed Laser Ready Test Laser Leady is displayed When the Laser Laser Leady Er
91. lled this function is not processed and Tray 3 Not Installed is shown FAN The fan keeps running after the execution key is chosen Fan On Off and stops when the stop key is chosen Service Manual Alignment amp Adjustments 6 1 2 4 Solenoid amp Clutch Test These Functions are used to check the present state normal or not of the solenoids and clutches 1 Press the Menu Key until finding Solenoid Test is displayed on the panel 2 Press the Select Key when it s found 3 Press the Arrow keys until finding the desired function Refer to the table below 4 Press the Cancel Key when it s found 5 Press the Select Key for execution Sub Menu Description Remarks Tray1 Solenoid Test The tray1 solenoid is on for 150ms and then it automatically stops Tray 1 Solenoid On Off when the execution is chosen Tray2 Solenoid Test The tray2 solenoid is on for 150ms and then it automatically stops Tray 2 Solenoid On Off when the execution is chosen Tray3 Solenoid Test The tray3 solenoid is on for 150ms and then it automatically stops Tray 3 Solenoid On Off when the execution is chosen Tray2 Clutch Test The tray2 clutch is on for 1sec and then it automatically stops Tray 2 Clutch On Off when the execution is chosen On this function the main motor runs before 2sec from the point of the clutch on in order to check the clutch state Tray3 Clutch Test The tray3 clutch is on for 1sec and then
92. ly and Reassembly 3 Remove the Tray Links from the MP Cover ESN Ty Link 2 Remove two springs from the Knock Up Plate Ass y below AN NOTICE Do not separate the spring from the MP Pick up rack for conve nience of assembling Locate the hook section of the spring that is connected to the Knock Up Plate ass y as shown in the picture below toward the outside for con venience of assembling MP Pick Up Rack Knock Up Plate Ass y Service Manual Disassembly and Reassembly 5 4 Retard Ass 1 Remove two screws Then lift the Roller Ass y as AN Notice When you reassemble the Retard Roller ass y make sure that the let shown below and of the Retard roller fits into the Retard shaft e 5 2 Service Manual S 3 5 S gt v Disassembly and Reassembly S CSS RH Cover Cassette Side 2 Remove two screws and take out the Right 1 Pull the Cassette out of the printer 5 5 RH Cover Disassembly and Reassembly 5 6 Main PBA 1 Before you remove the Main PBA you should remove RH Cover Refer to the 5 5 N 2 Unplug all the connecto
93. m horizontal image band 5 Transfer Roller 57 mm image ghost 6 Heat Roller 82 mm Black spot and image ghost 7 Pressure Roller 92 mm black spot on the backside OPC Drum H Transfer Roller BiHeat Roller Pressure Roller Rollers Layout Service Manual Alignment amp Adjustments Memo Service Manual TROUBLESHOOTING T Troubleshooting 7 1 The cause and solution of Bad image 7 1 1 Vertical Black Line and Band 1 Straight thin black vertical line occurs in the printing 2 Dark black vertical band occur in the printing Check and Cause Solution 1 Damaged develop roller in the Toner car 1 If causes 1 and 2 occur in the toner car tridge Deformed Doctor blade or clean tridge replace the toner cartridge and try ing blade to print out 2 Scratched surface of the discharge roller 2 Replace the transfer roller if occurred as in the toner cartridge No 3 3 Partly depression or deformation on the surface of the transfer roller 7 1 2 Vertical White Line Description White vertical voids in the image Check and Cause Solution Digital Printer Digital Printer 1 Foreign matter stuck onto the window of 1 Foreign matter stuck onto the window ME internal lenses of LSU mirror Clean the LSU window with recommend Digital Printer ed cleane
94. n Over 1 0 min if left in low temperature Background OD delta less than 1 0 croma meter Uniformity Max 0 2 Including Continuous Print Fusing Min 75 All Black amp 2 by 2 Pattern Skew Vertical Max 1 75 mm 250 mm Horizontal Max 1 5 mm 200 mm Bowing Horizontal applied to 200mm less than 0 5 mm Special Paper Exception Image Density Min1 0 Envelope Fusing Min 7096 Envelope OHP Postcard More than 120g m Paper Jam Less than 1 2000 75g m Paper in L L condition Paper Curl First Less than 16mm 10 Sheets gt measured in 1 min after printing 10 pages 3 Reliability 4 Fusing System Insulation Resistance over 100 MO at DC 500V 1 mm Voltage Strength less than 130V AC 1 0 kV Hi Pot Ground Continuous less than 250V AC 1 5 kV Less than 0 10 25A 3 sec Voltage DIP 10096 1cycle 50 2cycle 20 4cycle Leakage Current Less than 3 5mA 1 5 kohm Surge IEC61000 4 5 Normal 1KV Common 3KV OZONE Emission Average 0 1 PPM or less Top Cover Open Isolating the input power from below parts 150 High Voltage Part DC fan Clutch Fuser Motor Overcurrent Protect Trouble Sensing Fuse inside the SMPS The temperature does not rise to the specific temperature in the specific time The temperature is too high Indicate the Fuser error
95. n gt Feed Off Exit Off End It is possible that Feed Off Exit On when a paper size is small Service Manual Alignment amp Adjustments 6 1 2 3 Motor amp Fan Test These Functions are used to check the present state normal or not of the motors and fan 1 Press the Menu Key until finding Motor Fan Test is displayed on the panel 2 Press the Select Key when it s found 3 Press the Arrow keys gt until finding the desired function Refer to the table below 4 Press the Select Key when it s found 5 Press the Select Key for execution or the Cancel key to stop Sub Menu Description Remarks Main Motor The main motor keeps running after the execution key Main Motor On Off is chosen and stops when the stop key is chosen Laser Motor The laser motor keeps running after the execution key Laser Motor On Off is chosen and stops when the stop key is chosen Duplex Duplex Forward The duplex motor keeps running on the forward direction Duplex Forward On Off Motor after the execution key is chosen and stops when the stop key is chosen Duplex Reverse The duplex motor keeps running on the backward direction Duplex Backward On Off after the execution key is chosen and stops when stop key is chosen Tray3 Motor The Tray3 motor keeps running after the execution key Tray 3 Motor On Off is chosen and stops when the stop key is chosen gt When a tray 3 is not insta
96. n generate electrical charges sufficient to damage ESDs 5 Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient to damage ESDs 6 Do not remove a replacement ESD from its protective packaging until immediately before installing it Most replacement ESDs are packaged with all leads shorted together by conductive foam aluminum foil or a comparable conductive material 7 Immediately before removing the protective shorting material from the leads of a replacement ESD touch the protective material to the chassis or circuit assembly into which the device will be installed 8 Maintain continuous electrical contact between the ESD and the assembly into which it will be installed until completely plugged or soldered into the circuit 9 Minimize bodily motions when handling unpackaged replacement ESDs Normal motions such as the brushing together of clothing fabric and lifting one s foot from a carpeted floor can generate static electric ity sufficient to damage an ESD Service Manual Reference Information 2 Reference Information This chapter describes the reference information for applying this training manual and it is consist ed of the tool list the abbreviation table the outline of model and so on 2 1 Tool for Troubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual 1 DVM Digital Volt Meter 4 Tweezers Sta
97. n imaginary page count that accumulates a rotating time of a Main Motor When the count reaches 20 000 pages a message Replace cart is displayed in LCD It means the life span of the toner cartridge except a toner part has ended Even though it is a case that a toner is refilled the rest of major parts should end so entire toner cartridge should be replaced In the worst case when an OPC rotates over 20 000 pages it is pos sible that a toner may overflow When the count reaches to 20 000 pages the printed image becomes misty and an On Line key that is flashing on a set must be pressed for a single print If an OPC count is under 8 000 when displaying a message Remaining Toner 0 it means that a high coverage has been used If an OPC count is over 8 000 and if it has not been reached to 0 yet low coverage should was used 6 3 3 3 Manufacture Date 2003 01 Contents Shows the product year and the month of the developer 6 3 3 4 Supplier Contents shows the brand name of the developer Description If a supplier is other OEM the other OEM s name is displayed If a supplier is different between a set and developer a message invalid toner will be displayed in a LCD of a set and a machine turns to an impossible status to print Service Manual 6 3 3 5 A checking method of a toner remaining amount 1 Check a configuration sheet 2 Check by using a key of a set Setup maintenance remain toner 8 Check wit
98. n normal parts of the toner cartridge are added or substituted In case of 2 If there are any abnormals in connection with the situation of 1 1 occurs when the toner car tridge is recycled over 2 times 2 If toner nearly being expired are collected to use it is judged as the recycled toner cartridge 2 Service Manual Fault Signs Cause amp Check TROUBLESHOOTING Solution Ghost amp Image Contamination The printed image is too light or dark or partially contami nated black Totally contaminat ed black Black image print ed out The density of print outs is too dark and ghost occurs 1 The printed image is too light or dark or partially contami nated black 1 Check whether foreign sub stance or toner are stuck to the terminal point of contact of the toner cartridge 2 Check whether the terminal assembly is normal 2 Totally contaminated black Black image printed out 1 Check whether foreign sub stances are stuck to the ter minal point of contact of the toner cartridge and the state of assembly Especially check the charged roller terminal 3 The printed image is dark and ghost occurs 1 Check foreign substance attached to the terminal point of contact of the toner cartridge and the state of assembly Especially check the devel oping roller terminal 1 All of 1 2 above 1 Remove toner and foreign sub stances adhered
99. n the power level falls below 3 0V Then CPU U2 carries out initialization accordingly RESET signal is set at High followed by voltage change approximately after 50 150ms bi Treset 180ms Treset 137ms As shown in the diagram when the power reaches 3 0V after initial power Vcc is on Reset signal is sent to CPU after 180ms by reset circuit At this time CPU initializes itself and the surrounding elements Also it prevents various malfunctions by sending the reset signal when the Vcc falls below 3 0V during operation Initial operation voltage of IC 3 31596 0 5V Since IC guarantees operation at minimum 3 1V before the level falls below the minimum value the circuit is designed to activate reset function at 3 0V 11 2 4 2 CPU CPU is 32bit microprocessor SPGPi U27 352pin CPU receives 12 5MHz OSC Clock and operates at 50MHz All surrounding IC s are controlled by CPU Refer to Data Book for detailed CPU Specification 11 2 4 3 CPU Circuit OSC 12 5MHzZ is applied Clock is applied to CPU A5 using CY25814 The DC connected Bead and Resistance re used for EMI counter measures 11 2 4 4 Fuser Control Thermistor Circuit To settle the toner to the surface of a paper this circuit adequately controls the temperature of heat lamp It is composed of thermistor LM393 voltage comparison and transistor for switching Basic principle is that the thermistor attains resistance value that is inversely proportional to the heat lamp tem
100. ndard Indicates more than 3 digits Standard For general home use small type Za 5 Cotton Swab Standard For general home use for medical ser vice 2 Software Driver installation CD ROM 6 Spring Hook Standard For general use gt 3 Driver 7 Cleaning Equipments a IPA Isopropyl Standard type type M3 long M3 short M2 long Alcohol dry cloth or a soft stuff neutral M2 short detergent Service Manual G Reference Information 2 2 Acronyms and Abbreviations The table in the below explains abbreviations used in this service manual The contents of this service manual are declared with abbreviations in many parts Please refer to the table AC Altemating IPA_______lsopropyAlcohol 2 ASIC______ Application Specific Integrated Circuit IPM_______ Images Per Minute ASSY assemby 111 LAN ______ local area network 1 1 BIOS______ Basic Input Output System _______ lb pound s 4 p b CMOS Complementary Metal Oxide LBP LaserBeamPrinter Semleonduetor_ ________________ LCD _____ Liquid Crystal Display 1 111 OMBA LED ___Light Emitting Diode LSU ______ Laser Scanning Unit 1 CPU ______ Central Processing Unit 1 MB megbye _____________ T E X MHz megahertz E
101. nded life span of it has been ended 4 15 the movement Up and Down of 4 Clean the bushing part of the transfer the transfer roller smooth roller 5 Is the HVPS normal 5 If the problem is still not solved replace the toner cartridge Service Manual 7 1 9 Ghost 1 TROUBLESHOOTING Description Ghost occurs at 95 mm intervals of the drum in the whole printing Digital Printer Digital Printer Digital Printer 7 1 10 Ghost 2 G6 Check and Cause Solution 1 Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the elec trode of the Toner cartridge 2 Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board 3 The life of toner cartridge is expired 4 Transfer roller lifetime 100 000 sheets has expired 5 Abnormal low temperature below 10 6 Damaged cleaning blade in the toner car tridge 1 Clean the terminals when contaminated by toner particles 2 Occur in the toner cartridge replace the toner cartridge and try to print out 3 Replace the engine board if not solved by the above directions 1 2 4 If not solved by the direction 3 check the transfer roller lifetime and replace it 5 Wait about 1 hour after power on before using printer 6 Occur in the toner cartridge replace the t
102. ned small gap of the teeth in the OPC Charge roller 38mm Supply roller 45mm Develop roller 49mm Transfer roller 57mm 3 If the malfunction persists replace the toner cartridge 7 1 4 Black White Spot T 1 Dark or blurry black spots occur periodically in the printing 2 White spots occur periodically in the printing Check and Cause Solution Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1 If dark or blurry black spots occur periodi cally the rollers in the Toner cartridge may be contaminated with foreign matte or paper particles Charge roller 38 mm interval OPC drum 95 mm interval no If faded areas or voids occur in a black image at intervals of 95 mm or black Spots occur elsewhere the OPC drum surface is damaged Co black image is partially broken the transfer voltage is abnormal or the trans fer roller s life has expired 1 Run OPC cleaning Mode Print and run the Self test 2 or 3 times 2 In case of 95 mm interval unremovable in 1 cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster 3 The transfer roller guarantees 10 000 sheets printing If the roller s life is expired replace it 4 In case of 95 mm interval unremovable in 1 take measures as to replace the toner car tridge and try to print out 5 Clean the inside of the set a
103. o when the output voltage is 800V and resistance is 1008 If dif ference resistance value appear at 800V the feedback current and the index value will also vary accordingly Based on the index value read by CPU and already set Transfer Table the corresponding transfer voltage is generated The change in transfer output required in each section is adjusted by PWM DUTY T201 T1167 ky 471 R206 THV PWM 100 CN245 R205 Q203 7407 7407 A708 Y 24VS SBR1 2W 30MJ MGR1 2W100KF C101 35V 47uF 205 R210 iN4148 R217 5 R212 C203 D203 20201 20202 473 SBR1 2W 200MG 470K E 223 1N4148 5 6V 7 5V 2 CN1 3 4 T301 7 D304 R309 KAB 006 3KV 471 4KV 2 2K 1 6 R315 SBR1 2W 30MJ C306 D303 C308 2KV 680 4KV 3KV 471 D301 1N4148 THV READ c R302 R303 2 6 33K 100KF R304 8306 00KF 26 1KF C304 500V 103 Service Manual
104. occurs 5 The printing paper starts to be printed for duplex only by reversing rotation by an exit motor The printing paper enters to a machine through an exit roller and reaches to duplex sensor If the printing paper cannot reach to the duplex sensor after certain time a duplex Jam 1 occurs 6 The printing paper that passes the duplex sensor reaches to a feed sensor again and a printing operation is tried over again If the printing paper cannot reach to a feed sensor after certain time later a duplex Jam 2 occurs Service Manual Alignment amp Adjustments 6 2 1 Clearing Paper Jams When a paper jam occurs the display on the control panel shows the message indicating the corresponding location of the paper jam 6 2 1 1 Tips for Avoiding Paper Jams By selecting the correct paper types most paper jams can be avoided If a paper jam occurs follow the steps outlined in Ensure that the adjustable guides are positioned correctly Do not overload the tray Ensure that the paper is below the paper capacity mark on the right inside of the tray Do not remove the paper from the tray while printing Flex fan and straighten the paper before loading Do not use creased damp or highly curled paper Do not mix paper types in the input tray Use only recommended print media Ensure that the recommended print side is facing down when loading paper into the input tray 6 2 1 2 In the Paper Feed Area Jam 0
105. oner cartridge and try to print out Description Ghost occurs at 95 mm intervals of the OPC drum in the whole printing When printing on card stock or transparencies using manual feeder Digital Printer Digital Printer Digital Printer 56 Check and Cause Solution When printing on card stock thicker than nor mal paper or transparencies such as OHP higher transfer voltage is required Select Thick Mode on paper type menu from the software application and after using return ing to the original mode is recommended Service Manual TROUBLESHOOTING 7 1 11 Ghost 3 Fuser e Description Ghost occurs at 82 or 92 mm intervals Dioital Pri Check and Cause Solution igita rinter l The temperature of the fuser is maintained 1 Disassemble the fuser and remove the g high contaminated toner particles on the roller Digital Printer 5 and clean the foreign matter between 3 3 Thermistor and Heat roller Digital Printer Caution can be deformed 7 1 12 Satins on the Face of Page e Description background on the face of the printed page is stained Check and Cause Solution MU RS Digital Printer 1 Toner leakage due to improperly sealed 1 Replace the toner cartridge ae eee toner cartridge Digital Printer e ec Digital Printer 2 If the transfer roller is contaminated stains 2 If the trans
106. oreign matter and wire get caught in the actuator exit s operation 2 If the paper is rolled in the Fuser Roller 2 If the paper is stuck in the fuser dis This occurs when a Guide claw is assemble the fuser and remove the broken away or transformed jammed paper and clean the surface t occurs when the Spring of a Guide of the pressure roller with dry gauze claw is broken away or transformed It occurs when the Heat Roller or Pressure Roller is seriously contami nated with the toner 3 Paper is accordion in the fuser 3 Remove the jammed paper after disas sembling the fuser Clean the surface of the pressure roller with dry gauze Remove the toner particles stained on the rib Check the assemblage and perfor mance of the exit Service Manual TROUBLESHOOTING 7 2 5 JAM Duplex 1 e Description message duplex 1 is displayed in a LCD window Check and Cause Solution 1 Itis a case when a paper can not operate a duplex sensor 2 Itis a case when a paper can not reach to a duplex sensor due to a paper jam on a duplex path 7 2 0 JAM Duplex 2 1 Replace a SMPS or main PBA 2 A case that a paper jam occurs on A after it is reversed replace a 2nd exit roller after checking its operation 3 A case that a paper jam occurs on B after it is reversed replace a duplex roller after checking its operation Description A message
107. output are normal 2 Check the inferiority of LED Panel or LDC window on the front cover if the OP panel does not appear after normal warming up 1 Replace the power supply cord or SMPS 2 Replace the control board 3 Replace the OP panel Service Manual 5 TROUBLESHOOTING 7 3 10 Vertical Line Getting Curved Description When printing vertical line gets curved Check and Cause Solution 1 If the supply of 24v is unstable in the Main Control board 1 Replace LSU linking with LSU check drive by EDC Mode LSU Check 2 Replace the Toner Joint PBA 2 Check the Deve PBA in the Toner Cartridge 2 Replace the Main PBA Service Manual TROUBLESHOOTING 7 4 Toner Cartridge Service It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by the Samsung Electronic or caused by non licensed refill production 7 4 1 Precautions on Safe keeping of Toner Cartridge Excessive exposure to direct light more than a few minutes may cause damage to the cartridge 7 4 2 Service for the Life of Toner Cartridge If the printed image is light due to the life of the toner you can temporarily improve the print quality by redistributing the toner Shake the toner cartridge however you should replace the toner cartridge to solve the problem thoroughly 7 4 3 Distinguish function for choice cartridge Distinguish function for choice cartridge An EEP
108. perature The voltage value distributed between the resistance R8 and R9 is read at 69 IN of LPEC1 This voltage value becomes active inactive when Fuser signal is High low according to the set temperature table and the Rom program Based on the Q2 switching if the FUSERON signal is low TLP3061 U201 turns on AC voltage is applied to the heat lamp by turning on the bidirectional Thyristor THY201 or shut off by turning off the bidirectional Thyristor THY201 LM393 is the hardware type safety feature to prepare for abnormal heat lamp control When the temperature of thermistor rises to 210 C 1 pin of LM393 falls to low level which turns the FUSERON signal to High Q3 is forced Off Therefore the heat lamp is forced to go Off Service Manual CIRCUIT DESCRIPTION 11 2 4 5 Sensing Circuit 1 Cover Open Sensing Cover Open Sensor is located on the top right side of the Cover Open Board When the front cover opens it shuts off 24V DC fan Solenoid Main Motor LSU Polygon Motor and HVPS supplied to each unit B2 Bit of U4 senses cover open by sensing the developing section with B111 Bit of U18 In this case the red LED which is located on top of the OP Panel informs the user of the situation 2 Paper Exit Sensing The exit sensor assembled on the engine board and the actuator attached to the frame detect the paper exiting the printer The paper recognizes the On Off time of the exit sensor through B5 Bit of U4 and notifie
109. perature and low humidity environment it is possible that a contamination occur on entire image b When ZENER diode is disconnected a blank page is printed out It is the same case as when a ZENER diode is disconnected to OPC ground Service Manual 4 3 2 SMPS Switching Mode Power Supply It is the power source for the whole system It is an independent module so it is possible to use for common use It is mounted at the bottom of the set It consists of the SMPS part which supplies the DC power for driving the system and the AC heater control part which supplies the power for fuser SMPS has three outputting channels 3 3V 5V and 24V There are three kinds of power 120V exclusive America 220V exclusive Europe and 220V for china nations with insta ble power supply gt gt AC Input rated voltage 220V 240V 120V AC 220V Inputting voltage fluctuating range 198V 264V AC 90V 135V 198V 264V Rated frequency 50 60 Hz Frequency fluctuating range 47 63 Hz voltage Under 5 0Arms 2 5Arms gt gt Rated Power Output Channel name 3 3V 5V 24 0V 2 CONNECTOR PIN CON 3 CON 3 CON 3 3 3V PIN 12 14 5V PIN 8 24V 2 4 6 GND PIN 16 18 GND PIN 7 GND 7 8 10 3 Rated outputting voltage 3 3V 5 5V 5 24V 5 5 3 2 3 4V 4 75 5 25V 21 6 26 4V 4 Maximum outputting voltage 15A 05A
110. places where there is moisture or dust Do not install the printer in a place where lots of dusts or humidi fier are around A fire can occur A plug part needs to be cleaned well with dried fabric to remove dust If water drops are dripped on the place cover with dust a fire can occur 11 Avoid direct sunlight Do not install the printer near to window where directly contacts to the sunlight If the machine contacts sunlight long time the machine cannot work properly because inner temperature of the machine is getting higher A fire can be caused 12 Turn off the power and take off the plug when a smoke strange smell or sound from the machine If you keep using it a fire can occur 13 Do not insert steel or metal piece inside outside of the machine Do not put steel or metal piece into a ventila tor An electric shock can happen Service Manual Precautions 1 2 3 Precaution related handling the machine If you ignore this information you get hurt and machine could be damaged 1 Do not install unit on uneven surfaces or slanted floors Please confirm that unit is correctly balanced after installation Machine may fall over when itis not bal anced correctly 2 Be careful not to insert a finger or hair in the rotating unit Be careful not to insert a finger of hair in the rotating unit motor fan paper feeding part etc while the machine is operating Once it happens you could harm 3 Do not place any containers
111. plug the connector and remove the two screws as shown below Service Manual Alignment amp Adjustments 6 Alignment and Adjustments This chapter describes the main functions for service such as the product maintenance method the test output related to maintenance and repair DCU using method Jam removing method and so on It includes the contents of manual 6 1 How to use EDC Engine Diagnostic Control Mode 6 1 1 EDC Setup EDC Engine Diagnostic Control EDC will be used below is considered to test and check whether each functions of machinery and h w module are normal or not All of the test function are able to be controlled by the keys and LCD window on the panel without any other kits It s developed for related engineers not for users 6 1 2 Entering Exiting Method For EDC 1 Outline The method for entering EDC mode is especial because it is intended for technicians and not users After Entering the mode the message Engine EDC Mode is displayed On the mode an engineer should press the Menu Key to search each function he would like to test Turn the power off after the test is entirely end 2 Usage 1 Power off the printer 2 Pressing the Select key power the printer on 3 Keep pressing it until the message Engine EDC Mode is shown on the panel 4 Follow the usage for a function you would like to use 5 Turn the power off after the test is complete 6
112. previous electric potential of 800V The exposed image areas by LSU will contain approximately 150V and form charge ripple Such drum surface of reduced exposure which formed charge ripple reaches the develop roller according to the drum rotation and goes through the development process The charge ripple formed on the OPC drum surface is developed by the toner on the develop roller and transforms into image This step converts the image formed on the OPC drum surface by LSU to the image formed by toner SUPPLY SUPPLY ROLLER DEVELOP ROLLER HEATER ROLLER TRANSFER Paper Transfer Direction LL PRESSURE ROLLER TRANSFER ROLLER Each high voltage printing indicates the voltage required in the electric photo process The supply roller that received 650V adjusted from HVPS and the DEVE roller that received 470V adjusted will rotate inthe same direction The toner supplied to the OPC drum becomes negatively charged due to the static formed between the two rollers The toner supplied to the develop roller is transferred BIAS to the development section The negatively charged toner is attached to the develop roller then transferred to the exposed high electric potential surface 250V rather than low electric potential surface 800V The image is formed since the toner is not spread on the low electric potential surface The transfer process takes place when the OPC drum continuously rotates and reaches the transf
113. printer are designed so there is never any human access to laser radiation above a Class level during nor mal operation user maintenance or prescribed service condition Warning Never operate or service the printer with the protective cover removed from Laser Scanner assembly The reflected beam although invisible can damage your eyes When using this product these basic safety precautions should always be followed to reduce risk of fire electric shock and injury to persons CAUTION INVISIBLE LASER RADIATION WHEN THIS COVER OPEN DO NOT OPEN THIS COVER VORSICHT UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GE FFNET NICHT DEM STRAHL AUSSETZEN ATTENTION RAYONNEMENT LASER INVISIBLE EN CAS D OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU ATTENZIONE RADIAZIONE LASER INVISIBILE IN CASO DI APERTURA EVITARE L ESPOSIZIONE AL FASCIO PRECAUCION RADIACION LASER IVISIBLE CUANDO SE ABRE EVITAR EXPONERSE AL RAYO ADVARSEL USYNLIG LASERSTR LNING VED BNING N R SIKKERHEDSBRYDERE ER UDE AF FUNKTION UNDG UDSAETTELSE FOR STR LNING ADVARSEL USYNLIG LASERSTR LNING N R DEKSEL PNES STIRR IKKE INN STR LEN UNNG EKSPONERING FOR STR LEN VARNING OSYNLIG LASERSTR LNING N R DENNA DEL PPNAD OCH SP RREN URKOPPLAD BETRAKTA EJ STR LEN STR LEN R FARLIG VARO AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA N KYM TT M LLE LASER S TEILYLLE L KATSO S TEESEEN B PARTEA RMR 9 SH Aog Sl FASHA
114. r IPA Clean the window with a Digita Printer clean cotton swab Digita Printer 2 Foreign matter or toner particles between 2 Replace the toner cartridge the toner cartridge roller and blade In case the life of the toner cartridge has been expired white lines or light image occur in front of the image 3 It may occur when Burr and foreign sub 3 No 3 Remove the foreign matter and stances are on the window of the toner burr of the exposure window cartridge frame toner cartridge 4 If the fuser is defective voids occur peri 4 No 4 Open the front cover and check odically at the top of a black image ribs that corresponds to the position of the voids Remove if found 5 It may occur when foreign substances 5 If the problems are not solved replace are on the OPC Drum the toner cartridge Service Manual G TROUBLESHOOTING 7 1 3 Horizontal Black Band Description Digital Print Digital Printer 1 Dark or blurry horizontal stripes occur in the printing periodically They may not occur periodically Check and Cause Solution 1 Bad contacts of the voltage terminals to 1 Clean each voltage terminal of the Charge d toner cartridge Supply Develop and Transfer roller Digital Printer remove the toner particles and paper par Digital Printer ticles 2 The rollers of toner cartridge may be 2 Clean the left Gear that has relatively stai
115. r On Duplex Sensor After the back cover is open push a paper into the Duplex Sensor Off Duplex Sensor On duplex path and confirm the message changed Duplex Sensor Off to Duplex Sensor On Cover Open After the cover is open touch the sensor and confirm Cover Open Cover Close Sensor the message changed Cover to Cover Close Feed Sensor Touch the Feed sensor Feed Off Feed On Exit Sensor Touch the Feed sensor Exit Off Exit On Service Manual Alignment amp Adjustments 6 1 2 6 HVPS Test Item High Voltage Power Supply These Functions are used to check whether the control for HVPS is normal or not 1 Press the Menu Key until finding Developing Test is displayed on the panel 2 Press the Select Key when it s found 3 Press the Arrow keys gt until finding a suitable function Refer to the table below 4 Press the Select Key when it s found 5 Press the Select Key for execution or the Cancel key for stop Sub Menu Description TE VA Remarks Dev Bias Test Dev bias 470V and Supply bias 650V are Dev Bias On Off supplied and after the execution key is chosen and it stops when the stop key is chosen Charge Roll Charge roll voltage 1500V is supplied after Charge 1500V Value ADC value Voltage Test the execution key is chosen and it stops when displayed the stop key is chosen Transfer Test Transfer positive voltage 1000V is supp
116. rging roller and applies proper voltage to OPC for each environment The environment changes resistance are detected by comparator and comparator converts analog input to digital output Depending on such digital output program inputted in ROM of engine controller applies proper charging voltage for each environment in consideration of resistance changes C404 R403 472 15M T401 D404 R450 R415 MGR1 4W560KJ RDS1 2W100K KL ew A N 0401 ij 4 1N4148 470 104 ED 5 3KV471 Ca gt gt R416 27 0409 Bib nues BLR1 2W100MJ R401 1 10 OK zu VK 7 0402 C403 473 102 1N4148 331 C458 Q403 70402 R412 MY2A473 21404 71 D1 0 NL20U rr R461 5458 RD1 8W2 2KJ RS1 8W30KF 1C104 D k R460 Y RD1 8W1 5K 24 d RP al C410 2A473 ZD404 3 38 104 Service Manual 3 CIRCUIT DESCRIPTION 11 4 2 DEV SUPPLY DEV SUPPLY have same circuit construction and same driving condition with MHV Type 1 is a composition for driving DEV and Supply at the same type with one high trans and type2 is a composition for driving each bias with two trans D501 1N4148 BIAS PWM CN1 4 D501 1N4148 E gt C504 472 SUPPLY PWM D501 1N4148
117. ring function jam removing function and so on It uses rubbing pad method to feed 100 sheets of general papers and 100 envelops It is possible to extend to 300mm for accepting a legal size paper 8 Duplex unit It has paper transferring function paper guide function jam removing function paper sensing function and main board supporting function It is designed for basic attachment and the duplex feeding takes a side feeding method Usable papers are A4 letter and legal size paper For removing a jam occurred in a front part it is designed to open a cassette and a guide It is designed to open a rear cover to remove a jam in a rear part If a face up tray is open the duplex option cannot be used 9 SCF Second Cassette Feeder It is the same method with the main cassette and the capacity is 500 sheets It has a separate driving mechanism and feeds only A4 letter and legal size paper It is designed for a common use with a main cassette but it cannot be attached with the main cassette Service Manual Summary of product 4 1 2 Transfer It consists of a PTL Pre transfer Lamp and a transfer roller A PTL sheds light on an OPC drum lowers an electric potential of an OPC drum s surface and improves the efficiency of the transfer A transfer roller transfers toner on an OPC drum to the paper Life span Print over 60 000 sheets In 15 30 C 4 1 3 Driver Ass y By driving the motor the system takes power It is
118. ror Scanning Unit is ready to print On the other case Service Manual Alignment amp Adjustments 6 2 Paper Path OPC Drum R7 Feed Roller 51 Paper Empty Cassette Sensor Roller ee Jam 0 Jam 1 Service Manual Alignment amp Adjustments Jam 2 Jam Duplex 1 Jam Duplex 2 Simplex 1 A paper is fed from a cassette or MPF by a printing order 2 The fed paper passes a paper feeding sensor If the sensor does not operate after feeding the paper the JamO occurs 3 The paper passes a paper exit sensor and it comes out from a machine If the tailing edge of the paper does not come out from a machine after the leading edge of the paper passes the sensor then certain time later a Jam2 occurs Duplex 1 A paper is fad from a cassette or MPF by a printing order 2 The fed paper passes a paper feeding sensor If the sensor does not operate after feeding the paper JamO occurs 3 The paper that passes a paper exit sensor takes several printing processes and moves to a paper exit sensor If the sensor does not operate after certain time a Jam 1 occurs 4 If the paper does not discharge until the paper passes an exit roller and a Roller Exit F Down a Jam 2
119. rs as shown below 4 Remove two screws and take out the Dummy Bracket Dummy Bracket 3 The connectors are located as shown below DC Motor Fan 150 DC Fan Cartridge Panel Cover Open 5 Sensor Network Card Solt PTL gm a Engine PBA IL USP Port E DC Motor inc Q 0o 5 j Joint PBA 1 SCF aij E lo E Memory RAM Flash Memory DCU Main PBA NOTICE One screw among the screws is locked on the Engine Shield Refer to 5 25 3 Service Manual 5 7 Main Drive Ass y 1 Before you remove the Right Side Ass y you should remove RH Cover Refer to the 5 5 2 Unplug the two Connectors after you remove the two scres and take out the Cover Joint PBA Disassembly and Reassembly 5 Remove six screws and take out the Main Drive Ass y Cover Joint PBA E few 7 N J 2977 iN S J o lel 4 Y 7 S 227 5 Y Main Drive Ass y eu Cap Wire Power 3 Unplug the two connectors from the Main PBA and the Connector PBA 6 When separating the Main Motor ass y discon nect the connector form the Main PBA remove 4 screws and then remo
120. s E 9a onoo b oy a gt 5 294 a gt E D lt o 5 n DESS 0 oo S D N iL c c lt a o cj Disassembly and Reassembly 7 Push the idles toward the ends of shaft then 6 First lift the left side of the Shaft and then take out the Housing as shown below remove the Shaft Service Manual Disassembly and Reassembly 5 23 Pick up Ass y 4 Remove two springs from the Pick up Ass y 1 Before you remove the Pick up Unit you should Ke A remove RH Cover Refer to the 5 5 5 Lift Guide Front Dup out in the direction of arrow as shown below up ANEA A a 2 Remove E Ring and take The Gear Pick Cam out Take the Gear Regi out Main Drive Ass y Refer to the 5 7 Gear Regi 3 Remove four screws Then lift the Bottom Cross Bar as shown below Bottom Cross Bar S 5 S E v Disassembly and Reassembly 6 Remove the locking equipment rotate the Feed 8 Remove the Feed Ass y as shown below Roller Shaft s in the direction of the arrow and slide the bearing off as shown below Pick Up Roller SS Feed Roller
121. s the normal operation or jam information to the CPU Paper 2 is also notified Both Red amp Yellow LED from OP Panel Let go on 11 2 4 6 LSU Circuit 1 Polygon Motor 24V Polygon motor inside the LSU rotates by PMOTOR signal It passes Transient section and reaches the motor section LREADY signal is notified to 018 115 pin When LSU uses external clock for the motor rotation frequency CLOCK pin accepts the necessary frequency Clock circuit is composed inside the engine Crystal frequency of 58 36 MHz is activated by Engine CPU and uses 3562Hz for the rotation frequency of the polygon motor 2 Laser 5V When the laser is turned on by LDON signal horizontal scan takes place due to the 6 sided reflection mirror Polygon mirror attached to the polygon motor which rotates in clockwise direction At this time when the laser beam reaches the starting corner of each surface HSYNC signal pulse is activated The video controller uses 5 signal to form left margin of the image horizontal synchronous signal When the Vdout signal in inputted to the LSU it becomes LDON and ANDring to investigate suitable laser beam Vdout data contained ON OFF switching 11 2 4 7 Clock Circuit Clock uses 4 X Tal CPU is operated by 50MHz USB is operated by 30MHz X tal Video Clock is operated by 23 88MHz 11 2 4 8 Memory Circuit CPU initialization is composed of Flash Rom capable of PGM DRAM capable of reading and writing d
122. sferred to CPU by detecting the Photo Interrupter signal and the image data is distributed after set amount of time passes related to top layer of paper If the feed sensor does not detect within 1 second of paper feeding JAM 0 U18 105 will occur 3 Paper MP Sensing Photo Interrupt By operating of actuator which is attached to frame MP sensor detects existence of paper in MP and informs status to CPU Paper status is detected by U27 K26pin If paper exists it is fed in MP status 4 Paper Exit Sensing Photo Interrupt Actuator which is attached to frame and connected to Engine Board SMPS detects if paper exits from fusing unit CPU detects information of normal operation and jam by that U18109pin detects on off signal of exit sensor photo interrupt and it display jam2 status on LCD Panel 5 Paper Duplex Sensing Photo Interrupt Sensor OP1 attached on engine board SMPS detects paper information when operating duplex printing CPU detects information of jam and normal operation by that U18 102pin detects the detecting signal and it displays duplex jam1 or duplex jam2 on LCD panel according to status of entering duplex paper 6 Paper Out Bin Full Sensing Photo Interrupt Out Bin Full Sensor detects existing paper amount by operating actuator attached to frame and informs the status to CPU U18 114pin detects existing paper amount and displays the status on LCD panel 7 Paper Size Sensing tact switch It
123. sulting part In the other words the AC control part is passive circuit so it turns the heater on off with taking signal from engine control part When the HEATER ON signal is turned on at engine the LED of PC1 Photo Triac takes the voltage and flashes From the flashing light the Triac part light receiving part takes the voltage and the voltage is supplied to the gate of Triac and flows into the Triac As a result the AC current flows in the heat lamp and heat is occurred On the other hand when the signal is off the PC1 is off the voltage is cut off at the gate of Triac the Triac becomes off and then the heat lamp is turned off Triac THY1 feature 12A 600V SWITCHING gt gt Phototriac Coupler PC3 Turn On If Current 16mA High Repetive Peak Off State Voltage Min 600V Service Manual 4 4 Engine F W 4 4 1 Feeding If feeding from a cassette the drive of the pickup roller is controlled by controlling the solenoid The on off of the solenoid is controlled by controlling the general output port or the external output port If feeding from a manual feeder decide to insert the paper according to the operation of the manual sensor and by driving the main motor insert the paper in front of the feed sensor While paper moves occurrence of jam is judged as below Refer to the 6 2 Paper Transfer rout 4 4 1 1 Jam 0 After picking up paper cannot entered due to paper mis feed After picking up paper
124. t ic latent image on the OPC drum by controlling laser beam exposing OPC drum and turning principle of polygon mirror The OPC drum is turned with the paper feeding speed The HSYNC signal is created when the laser beam from LSU reaches the end of the polygon mirror and the signal is sent to the con troller The controller detects the HSYNC signal to adjust the vertical line of the image on paper In other words after the HSYNC signal is detected the image data is sent to the LSU to adjust the left margin on paper The one side of the polygon mirror is one line for scanning Service Manual 4 1 6 Toner Cartridge By using the electronic photo process it creates a visual image In the toner cartridge the OPC unit and the developer unit are in a body The OPC unit has OPC drum and charging roller and the developer unit has toner toner cartridge supply roller developing roller and blade Doctor blade Developing Method Non magnetic 1 element contacting method Toner Non magnetic 1 element shatter type toner The life span of toner 8 000 sheets IDC Pattern A4 standard Toner remaining amount detecting sensor None OPC Cleaning Cleaning blade type Management of disusable toner Collect the toner by using electric static Clenerless Type No disusable toner OPC Drum protecting Shutter None Classifying device for toner cartridge ID is classified by interruption of the frame channel Cleanin
125. t condition to display the image The HVPS part takes the 24V and outputs the high voltage for THV MHV BIAS and the outputted high voltage is supplied to the toner OPC cartridge and transfer roller Exit Sensor T aM A Wir d A aM e Service Manual Summary of product 4 3 1 HVPS High Voltage Power Supply 1 Transfer high voltage THV Function It is a voltage that transfers toner on an OPC Drum to paper Output voltage MAX 4 2 KV 5 Duty is changeable Not loading 1 6KV 1596 When cleaning 200MOhm It transfers toners with polarity of transfer roller to an OPC Drum Error type IF THV is not outputted it causes a low density due to toner on an OPC Drum if it is not transferred to paper It is possible that over flow occurs if toner is piled up in a toner vessel continuously 2 Charge voltage MHV Function It is a voltage that charges a surface of OPC to 750V 900V Output voltage 1 3KV 1 5KV DC 50V Error type IF MHV is not outputted toner overflows and reaches to an OPC drum if surface of an OPC is not charged A black paper is printed out when it happens 3 Cleaning voltage THV Function It removes contamination at a rear by sending polarity in a transfer roller to OPC drum to take toner Output voltage A change range is large according to a load because there is no f
126. t printer memory means hard disk space problem rather than the RAM problem In this case provide more space for the hard disk Secure more space using the disk utilities program no 2 Printing error occurs even if there is enough space in The connection of the cable and printer port is not the hard disk proper Check if the connection is properly done and if the parallel port in CMOS is rightly set up Co 3 Check the parallel port related items in the CMOS As a printer port Select ECP or SPP among Setup SPP Normal ECP and EPP modes increase print ing speed SPP normal mode support 8 bit data transfer while ECP Mode transfer the 12 bit data 4 Reboot the system to print 4 If the regular font is not printing the cable or the printer driver may be defective Turn the PC and printer off and reboot the system to print again If not solved double click the printer in my computer If the regular fonts are not printed this time again the cable must be defective so replace the cable with new one Service Manual TROUBLESHOOTING 7 5 3 Abnormal Printing The printing is not working properly even when the cable has no problem Description even after the cable is replaced If the printer won t work at all or the strange fonts are repeated the printer driver may be defec tive or wrong setup in the CMOS Setup Check and Cause Solution 1 Set up the parallel port in the CMOS SETUP
127. tart stop L operation and clock signal to motor unite to operate motor and its rotating speed is controlled by clock frequency Among controlling signals start stop signal controls U18 19pin and clock signal controls 018 68pin If moving current is high when driving it maintains speed within 600ms standard speed Current is changed depending on loading 3 Exit Motor Exit motor drives a fuser and it rotates clockwise or counterclockwise when simplex or duplex printing is working 4 Main MP Solenoid Solenoid functions to pick up fed paper from cassette or MP Operating time is 150ms Main solenoid is controlled by Q4 TR with U27 E23pin signal and MP solenoid is controlled by Q5 TR with U27 C24pin signal Operating current is under 250mA 5 Regi Clutch Regi Clutch functions to separate paper Clutch prevents overlapping delivery of fed paper After passing 500ms when paper detects the feed signal it turns off and separates papers U27 A26 pin signal controls Q6 TR and operating current is under 150mA Service Manual 3 CIRCUIT DESCRIPTION 11 2 4 Video Controller 11 2 4 1 Power On Reset Circuit Reset circuit initializes PPC U26 and SPGPi U27 when the power turns on and prevents unstable CPU operation until the power reaches standard level This circuit is composed of R C circuit which decides the value of XC61FN3112MR U20 Reset IC and Reset time Reset takes place 0 2seconds after the power is on and whe
128. ter finished repair check the assembled state whether it is the same as before the repair or not Service Manual 3 Precautions 1 3 ESD Precautions Certain semiconductor devices can be easily damaged by static electricity Such components are commonly called Electrostatically Sensitive ES Devices or ESDs Examples of typical ESDs are integrated circuits some field effect transistors and semiconductor chip components The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity Caution gt gt Be sure no power is applied to the chassis or circuit and observe all other safety precautions 1 Immediately before handling a semiconductor component or semiconductor equipped assembly drain off any electrostatic charge on your body by touching a known earth ground Alternatively employ a commer cially available wrist strap device which should be removed for your personal safety reasons prior to apply ing power to the unit under test 2 After removing an electrical assembly equipped with ESDs place the assembly on a conductive surface such as aluminum or copper foil or conductive foam to prevent electrostatic charge buildup in the vicinity of the assembly 3 Use only a grounded tip soldering iron to solder or desolder ESDs 4 Use only an anti static solder removal device Some solder removal devices not classified as anti static ca
129. the OPC drum surface is transferred to the paper surface by transfer roller The toner on the OPC drum surface receives hundreds up to thousands of volts from HVPS and transferred to the paper surface since the voltage is larger than the toner on the OPC The toner with weak static energy settles on the paper by pressure and heat from the pressure roller and heat roller The printing process is completed when the pressure from the pressure roller and the heat from the heat roller forces the melted toner to settle the image on the paper surface and the paper exits the printer 3 Service Manual CIRCUIT DESCRIPTION 11 3 3 Composition HVPS is composed of electric charge printing section BIAS printing section and transfer printing section 1 Input section 2 Electric charge printing ENABLE section MHV MAIN HIGH VOLTAGE 3 BIAS printing ENABLE section DEV DEVELOPMENT VOLTAGE SUPPLY SUPPLY VOLTAGE 4 Transfer printing ENABLE section THV TRANSFER HIGH VOLTAGE 5 Transfer printing ENABLE section THV TRANSFER HIGH VOLTAGE Switching section Feedback section Rectification section Printing section 6 7 8 9 gt 11 3 3 1 BLOCK DIAGRAM of Electric Charge Printing Section SWITCHING Print Circuit CONTROL Circuit UNIT MHV PWM FEEDBACK 11 3 3 2 BLOCK DIAGRAM of BIAS Printing Section SWITCHING Print Circuit CONTROL Circuit UNIT SUPPLY BIAS PWM
130. tion 11 1 1 General Specification Item Specification amp Descriptions Remark Engine Phaser 3450 Type Desktop Print Speed 24 PPM A4 Size 5 Character Pattern At Copy Mode Resolution 1200 X 1200 DPI addressable Source of Light Laser Diode LSU Print Method Non impact Electrophotography Laser Beam Feed Method Cassette amp Manual Feed Reference Center Reference Loading o Joo J Paper Size 1 Normal Paper A4 Letter Legal B5 Executive 2 Envelope Normal Envelope 3 Other OHP 4 Length 125 365mm Width 75 216mm Weight For Bin Cassette 60 163g m For Manual 60 163g m Cardstock Label 10 Paper Capacity Cassette 550 Sheets Manual Slot 100 Sheets 11 Paper Stacker Capacity Face Down 250 Sheets Faceup 100 Sheets 12 Warming up Time Less than 50 sec 13 First Printing Time Stand By 12 Sec 14 Power Rating AC 110V 15 50 60Hz 3Hz AC 220V 15 50 60Hz 3Hz 15 Power Consumption 630 W Avr 400W 16 Power Saving Consumption Max 20 Wh Sleeping Mode 17 Power Switch Right Side Backward 18 Certification amp Compliance c UL TUV GS CB CDRH CE FCC 19 Acoustic Noise Standby 35 dB Operating 53 dB Service Manu
131. toner cartridge 2 OK Lack of toner so the life is nearly closed 2 Some part of image is not printed Shake the toner cartridge and then recheck 1 NG Check the weight of the toner cartridge and clean the LSU window with a cotton swab then recheck 2 OK Lack of toner so the life is nearly closed 3 Periodically a noise as tick tick occurs Measure the cycle and the weight of the toner cartridge 4 White vertical stripes on the whole screen or partly Check the weight of the toner cartridge 1 Co AR All of 1 2 3 above If it become better by shaking replace with a new toner car tridge after 50 100 sheets in the closing state of the life span In case of 2 If it becomes better after clean ing the LSU window then the toner cartridge is normal Because of foreign substance on the LSU window the image has not been printed partly In case of 3 If the cycle of noise is about 2 seconds the toner inside the toner cartridge has been nearly exhausted Purchase and replace with a new toner car tridge after using about 200 sheets at the point of occur rence In case of 3 This is a phenomenon caused by lack of toner so replace with a new toner cartridge Toner Contamination Toner is fallen on the papers periodi cally Contaminated with toner on prints part ly or over the whole surface 1 Toner is fallen on the paper periodically 1
132. transfer roller The electrically charged OPC drum surface react to the image data from LSU which received print order based on the rotation and becomes exposed At this time the areas that are not exposed will maintain the previous electric potential of 800V The exposed image areas by LSU will contain approximately 150V and form charge ripple Such drum surface of reduced exposure which formed charge ripple reaches the develop roller according to the drum rotation and goes through the development process The charge ripple formed on the OPC drum surface is developed by the toner on the develop roller and transforms into image This step converts the image formed on the OPC drum surface by LSU to the image formed by toner The supply roller that received 650V adjusted from HVPS and the DEVE roller that received 470V adjusted will rotate inthe same direction The toner supplied to the OPC drum becomes negatively charged due to the static formed between the two rollers The toner supplied to the develop roller is transferred BIAS to the development section The negatively charged toner is attached to the develop roller then transferred to the exposed high electric potential surface 150V rather than low electric potential surface 800V The image is formed since the toner is not spread on the low electric potential surface The transfer process takes place when the OPC drum continuously rotates and reaches the transfer section The toner on
133. uct 4 2 6 Sensor input circuit 4 2 6 1 Paper Empty Sensing The Paper empty sensor Photo Interrupter on the engine board informs the state of paper to CPU whether it is empty or not by operation of the actuator When cassette is empty it detects the fact by reading the 024 Bit of CPU and then displays the fact on the LCD panel 4 2 6 2 MP Sensing By operation of the MP Sensor Photo Interrupter on frame and Actuator it informs the state of paper to CPU whether it is empty or not It reads the D25 Bit of CPU for recognizing paper in MP and paper is fed from MP if there is 4 2 6 3 Paper Feeding When paper passes the actuator on the feed sensor part it detects the signal of Photo interrupter informs the paper feed ing state to CPU and then sprays the image data after certain time If it doesn t detect the feed sensor within 1 sec after paper is fed paper CPU Y13 is occurred Displays on the LCD panel 4 2 6 4 Toner Remain Sensing The Developer terminal is mounted to the joint board located on frame When the developer is inserted it is adhered to the contacting point of the joint board to sense whether the developer exists or not ID amount of toner and so on 4 2 6 5 Paper Exit Sensing It detects paper state whether paper gets out from the set with operation of exit sensor on the engine board and actuator on the frame Paper detects the on off time of exit sensor by reading CPU W11 and the normal operat
134. ue to Step 2 2 Open the top cover and remove the toner cartridge If the jammed paper is not visible or there is resistance when you pull the paper go to In the Paper Exit Area CAUTION To prevent damage to the toner cartridge do not 5 Flip down the guide feed and reinstall the toner car expose it to light for more than a few minutes Place tridge a piece of paper over the top of the toner cartridge to shield it while it is out of the printer 3 Carefully lift up the guide feed NOTE If the toner cartridge is difficult to reinstall make sure that the guide feed has been flipped back down into position 6 Close the top cover Printing can be resumed Service Manual Alignment amp Adjustments 6 2 1 4 In the Paper Exit Area Jam 2 1 If along portion of the paper is visible pull it straight out 3 Loosen the paper if it is caught in the feed rollers Then If not continue to Step 2 gently pull the paper out 4 Close the rear output tray 5 Open and close the top cover Printing can be resumed Service Manual Alignment amp Adjustments 6 2 1 5 In the Duplex Area Duplex Jam 1 1 Open the rear output tray 2 Remove the jammed paper Duplex Jam 2 3 Close the rear output cover 4 Open and close the top cover Printing can be resumed 1 Pull t
135. ve the Main Motor ass y 9 E ring Service Manual Disassembly and Reassembly 5 8 Connector PBA 1 Before you remove the Connector PBA you should remove RH Cover Refer to the 5 5 2 Unplug all of the connectors from the Connector PBA and take it out 3 The connectors are located as shown below SK NSS Solenoid Main Solenoid Main PBA Clutch MP Empty Service Manual Disassembly and Reassembly 5 9 Solenoid 4 Remove two screws and take out the Main 1 Before you remove the Connector PBA you should Solenoid Main Solenoid Main Drive Ass y Refer to the 5 7 RH Cover Refer to the 5 5 remove 2 Unplug the MP Solenoid Harness and the Main Solenoid Harness from the Connector PBA NOTICE It is not necessary to disassemble the Main Drive Ass y to remove the MP Solenoid Solenoid 3 Remove two screws and take out the MP amp MP Solenoid Service Manual Disassembly and Reassembly 5 10 LH Cover 1 Pull the Cassette out of the printer 3 Remove two screws and take out the LH Cover LH Cover 2 Remove two screws and take out the Right Side Rear Cover Servic

LASER PRINTER Phaser 3450

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