Lexmark C760 Service Manual

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...

5-30Service Manual
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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...

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...

5-32Service Manual
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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,...

6-2Ser vice Manual
5060-4
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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
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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,...

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...

7-2Ser vice Manual
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Assembly 1:  Covers