Lexmark C760 Service Manual

Diagnostic information2-115
  5060-4xx
Envelopes do not feed from the tray or do not feed correctly
Step Action and questions Yes No
1 Check the envelope feeder tray to make sure it is 
installed correctly.
Is the tray installed correctly? Go to step 2 Install the tray 
correctly
2Check the tray to make sure it has been setup correctly 
for the size of envelopes being used.
Has the tray been setup correctly? Go to step 3 Set the tray up 
correctly
3Check the tray for any signs of broken or damaged...

2-116Service Manual
5060-4
xx   
Finisher service check
If a failure is detected by the system board, an error may be displayed. The LEDs on the HCOF system board 
can help in diagnosing the errors.
HCOF error code table
LEDs lit by number
Description
33 34 35 36 37 38 39 42
x Error detected by Punch Timing Sensor
x Error detected by Inverter Jam Sensor
x x Error detected by Drop Timing Sensor
x Error detected by Exit Timing Sensor
x x Error detected for the Jogger Motor
x x Error detected for the Punch...

Diagnostic information2-117
  5060-4xx
Check Finisher displayed, unable to clear message
Step Action and questions Yes No
1 Check for correct printer and finisher installation. Make 
sure the magnetic bracket is mounted on the printer.
Is the magnetic bracket mounted? Go to step 2 If not installed, 
install the bracket
2Is the pin on the magnetic bracket actuating the joint 
switch in the finisher? Go to step 3 Find out why the 
pin is not 
actuating the 
switch and repair 
as necessary
3Check the joint...

2-118Service Manual
5060-4
xx   
Finisher is inoperative, or not recognized
This problem can be caused by a problem with the autoconnect system between the finisher and the printer. It 
also can be caused by a problem with the power system in the finisher.
Step Action and questions Yes No 1 Check the AC line cord to the finisher to make sure the 
options and printer are connected properly.
Are the printer and options AC line cords connected 
properly? Go to step 2 Connect the 
printer and 
options...

Diagnostic information2-119
  5060-4xx
Front door is open, no indication on display
Fan in finisher inoperative
10Check the voltage at J2-5 on the system board. The 
voltage measures approximately +5 V dc.
Is the voltage correct? Replace the top 
options cable
Replace the 
system board
Step Action and questions Yes No 1 Make sure the front door is activating the cover switch.
Is the door activating the cover switch? Go to step 2 Repair or replace 
the door 
assembly
2Check door - door switch activating...

2-120Service Manual
5060-4
xx   
No indication that the chad box is full, no message
Chad Box Full message when chad box is not full
Step Action and questions Yes No
1 Make sure the chad box is correctly installed in the 
finisher.
Is the chad box correctly installed? Go to step 2 Install the chad 
box correctly
2Make sure the chad box cable S5 is properly 
connected to CN5 on the finisher system board.
Is the cable properly connected? Go to step 3 Install the cable 
correctly
3Make sure the chad box...

Diagnostic information2-121
  5060-4xx
HCIT 2000-sheet option service check
HCIT system board LED error code table
If a failure is detected by the system board, an error code may be displayed. If the system board LED is on solid, 
the HCIT detects that the tray or side door is not closed.
The LED on the system board may blink. Count the number of times the LED blinks and use the following table 
to determine the problem.
LED blinks Problem
1 Jam at registration sensor S2
2 Jam before the leading edge of...

2-122Service Manual
5060-4
xx   
Printer does not recognize that the HCIT 2000-sheet option is installed.
Step Action and questions Yes No
1 Is the HCIT 2000-sheet option the only paper input 
option that is not recognized? Go to step 5 Go to step 2
2Make sure that the printer and any option above the 
HCIT 2000-sheet option are installed correctly.
Are the printer and any options installed correctly?Go to step 3 Install the options 
correctly and 
recheck 
performance
3Check for correct installation of...

Diagnostic information2-123
  5060-4xx
HCIT inoperative
Before proceeding with this service check make sure the 2000-sheet tray option is properly connected to AC 
power.
If a finisher is installed:
The AC jumper should go from the HCIT to the finisher. The finisher AC power cord should attach to the AC 
voltage source. The base printer power cord should plug into the AC output connector on the HCIT.
If a finisher is not installed:
The printer power cord plugs into the HCIT AC outlet and the power...

2-124Service Manual
5060-4
xx   
HCIT 2000-sheet option does not recognize the size paper selected.
Fuser drive assembly noise check
Excessive fuser drive motor assembly noise 
Step Action and questions Yes No
1 Make sure the media loaded in the tray meets 
specifications.
Is the media loaded properly and meet specifications? Go to step 2 Load the media 
properly or inform 
the customer that 
the media does 
not meet 
specifications
2Check the paper tray guide for correct installation.
Is the paper tray...