Lexmark C760 Service Manual
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Connector locations5-29 5060-4xx See “HCOF system board” on page 5-28 . Connector Pin no Signal CN1 Drop Solenoid 1 SOL+ 2SOL- CN2 Stapler Assembly 1 MTR- 2MTR- 3N/C 4MTR+ 5MTR+ 6N/C 7No Cartridge 8 Low Staple 9 Home Position 10 Unit Check 11 Ground 12 +5 V dc CN3 Jogger Motor/ Accumulator Drive Motor 1 Jog A 2 Jog *A 3 Jog B 4 Jog *B 5Bun A 6Bun *A 7Bun B 8Bun *B CN4 Jogger Force Homing Sensor Accumulator Homing Sensor 1+5 V dc 2 Jog Home Pos Sensor 3 Ground 4+5 V dc 5 Accumulator Home Pos Sensor 6 Ground CN5 Chad Box Full 1 +5 V dc 2 Chad Box Sensor 3 Ground
5-30Service Manual 5060-4 xx CN6 Tray Sensors Tray Limit/ Near Full/Output Tray Offset Sensor 1Tray Limit SW 2 Ground 3+5 V dc 4 Tray Near Full Sensor 5 Ground 6+5 V dc 7 Tray Offset Posit Sensor 8 Ground CN7 Output Tray Offset Motor 1 MTR + 2MTR - CN8 Tray Sensors Exit Timing/ Paper Surface Upper/ Paper Surface Lower 1+5 V dc 2 Exit Timing Sensor 3 Ground 4+5 V dc 5 Paper Surface Upper Sensor 6 Ground 7+5 V dc 8 Paper Surface Lower Sensor 9 Ground CN9 Punch Motor 1 A+ 2A- 3B+ 4B- CN10 Inverter Solenoid/ Inverter Jam Sensor 1+SOL 2-SOL 3+5 V dc 4 Inverter Jam Sensor 5 Ground CN11 Front Door Switch 1 Switch + 2Switch - CN12 Tray Elevation Motor 1 MTR + 2MTR - CN13 Exit Motor 1 A+ 2A- 3B+ 4B- 5N/C See “HCOF system board” on page 5-28 . Connector Pin no Signal
Connector locations5-31 5060-4xx CN14 Low Voltage Power Supply 1 +24 V dc 2+24 V dc 3P-Ground 4P-Ground CN15 Enter Motor 1 A+ 2A- 3B+ 4B- 5N/C CN16 Punch Motor Homing Sensor/ Drop Timing Sensor/ Inverter Timing Sensor/ Punch timing Sensor 1+5 V dc 2 Drop Timing Sensor 3 Ground 4+5 V dc 5 Punch Home Sensor 6 Ground 7+5 V dc 8 Punch Timing A Sensor 9 Ground 10 +5 V dc 11 Punch Timing B Sensor 12 Ground CN17 Accumulator Solenoid 1 SOL+ 2SOL - CN18 Communications 1 TxD 2SG 3RxD 4SG 5FG CN19 Printer Docking Switch 1 Switch - PTR Joint 2N/C 3 Ground CN20 CPU Prog 1 20 CN21 Fan Connector - not used 1 +24 V dc 2 Control CN22 Main Fan 1 +24 V dc 2 Control See “HCOF system board” on page 5-28 . Connector Pin no Signal
5-32Service Manual 5060-4 xx HCOF LVPS board HCOF sub LVPS relay board Connector Pin No Signal CN2 LVPS Out 1 +24 V dc 2+24 V dc 3+24 V dc 4+24 V dc 5 Ground 6 Ground 7 Ground 8 Ground CN1 1 AC In from Relay 2 Not used 3 Not used 4 Not used 5 AC In from Relay Connector Pin noSignal CN1 AC Input 1 AC In 2 Not used 3 Not used 4 Not used 5AC In CN2 LVPS 1 AC Out to LVPS 2 Not used 3 AC Out to LVPS CN3 Relay Board +5 V dc Switched 1+5 V dc 2Ground
Preventive maintenance6-1 5060-4xx 6. Preventive maintenance This chapter describes procedures for printer preventive maintenance. Follow these recommendations to help prevent problems and maintain optimum performance. Safety inspection guide The purpose of this inspection guide is to aid you in identifying unsafe conditions. If any unsafe conditions exist, find out how serious the hazard could be and if you can continue before you correct the hazard. Check the following items: Damaged, missing, or altered parts, especially in the area of the On/Off switch and the power supply Damaged, missing, or altered covers, especially in the area of the top cover and the power supply cover Possible safety exposure from any non-Lexmark attachments Lubrication specifications Lubricate only when parts are replaced or as needed, not on a scheduled basis. Use of lubricants other than those specified can cause premature failure. Some unauthorized lubricants may chemically attack polycarbonate parts. Use IBM no. 10 oil, P/N 1280443 (Approved equivalents: Mobil DTE27, Shell Tellus 100, Fuchs Renolin MR30), IBM no. 23 grease (Approved equivalent Shell Darina 1), and grease, P/N 99A0394 to lubricate appropriate areas. Use Nyogel type 774 to lubricate the Fuser Drive Assembly and Nyogel 744 to lubricate the ITU and Cartridge Drive assemblies.
6-2Ser vice Manual 5060-4 xx Lubrication for replacement motors The motor drive FRUs contain the proper lubricant in the FRU. Only use the lubricant included. Fuser drive assembly Before installing the new fuser drive assembly: 1.Apply a thin coating of Nyogel type 774 grease to the points identified (A) from the supplied packet. 2.Rotate the motor housing (B) to distribute evenly.
Preventive maintenance6-3 5060-4xx Cartridge drive assembly 1.Apply a thin coating of Nyogel type 744 grease to the points identified (A) from the supplied packet. 2.Rotate the motor housing (B) to distribute evenly. ITU drive assembly 1.Apply a thin coating of Nyogel type 744 grease to the points identified (A) from the supplied packet. Note: Do not lubricate Gear 58 (C). 2.Rotate the motor housing (B) to distribute evenly. A B A A B C
6-4Ser vice Manual 5060-4 xx Scheduled maintenance The operator panel displays 80 Fuser Maintenance and 83 ITU Maintenance for scheduled maintenance. 80 Fuser Maintenance is displayed at each 200,000 copies when the fuser assembly needs to be replaced to maintain the print quality and reliability of the printer. The parts are available as a maintenance kit with the following part numbers: Standard fusers 56P2910, Maintenance kit 115 V fuser 56P2911, Maintenance kit 220 V fuser 56P2912, Maintenance kit 100 V fuser Web oiler fusers and web oiler replacements The web oiler fuser has a life of approximately 200,0000 copies, but the web oiler life is about 100,000. 12G6524, Fuser assembly, web oiler 115 V 500W 12G6525, Fuser assembly, web oiler 220 V 500W 12G6499, Fuser assembly, web oiler 100 V 500W (Japan) 12G6545, Web oiler assembly 83 ITU Maintenance is displayed at each 120,000 copies when the ITU Assembly needs to be replaced to maintain the print quality and reliability of the printer. There are two assemblies, ITU assembly and Second Transfer Roll, in a maintenance kit. Both should be replaced at the same time. The parts are available as a maintenance kit with P/N 56P2848, ITU Maintenance Kit. After replacing the kit, the fuser maintenance count must be reset to zero to clear the maintenance message. 84 Oiler Nearly Exhausted is displayed at each 100,000 copies when the Web Oiler Assembly is nearly exhausted. Go to “Web Oiler Assembly” on page 7-9 for par t number.
Parts catalog7-1 5060-4xx 7. Parts catalog How to use this parts catalog SIMILAR ASSEMBLIES: If two assemblies contain a majority of identical parts, they are shown on the same list. Common parts are shown by one index number. Parts peculiar to one or the other of the assemblies are listed separately and identified by description. NS: (Not Shown) in the Asm-Index column indicates that the part is procurable but is not pictured in the illustration. The Lexmark C76 x (506 x-4 xx ) laser printer is available in four models: The parts catalog uses the following model designations to identify model specific FRUs: 401, 402, 421, and 422. Lexmark C760 5060-401 Non-network Lexmark C760 5060-402 Network Lexmark C762 5060-421 Non-network Lexmark C762 5060-422 Network