Lexmark C760 Service Manual

Diagnostic information2-45
  5060-4xx
120 error code
This error code displays whenever an incorrect hot roll fuser lamp is installed.
4Check the printer is setting on a solid, flat surface.
Is the printer setting on a solid flat surface? Go to step 5 Inform the 
customer that the 
printer must be 
setting on a solid 
flat surface.
5The front contamination shield is attached to the front 
plate of the ITU frame and lies on the top of the ITU 
belt.
Is the front contamination shield lying on the ITU belt....

2-46Service Manual
5060-4
xx   
121 error code
This error code displays whenever an incorrect fuser backup roll lamp is installed.
122 error code
Cold fuser
If error code 122 displays, the printer has detected a problem in the fuser hot roll lamp circuity, back up roll fuser 
lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits.
Replace the following FRUs in the order shown:
1.“Fuser assembly” on page 4-35.
2.“LVPS assembly” on page 4-46....

Diagnostic information2-47
  5060-4xx
124 error code
Hot fuser
Error code 124 displays whenever the printer detects a problem with the fuser running over temperature or the 
fuser lamps have been on too long. A problem could exist in the fuser assembly with the hot roll bearings, hot roll 
thermistor, or other hot roll parts. The LVPS or system board assembly can also be failing.
125 error code
Hot fuser
Error code 125 displays whenever the printer detects a problem with the fuser running over...

2-48Service Manual
5060-4
xx   
126 error code
Hot roll thermistor or thermistor circuits are open
If error code 126 displays, the printer detects a problem in the fuser hot roll, back up roll lamp circuits, fuser hot 
roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits.
127 error code
Backup roll thermistor or thermistor circuits are open
If error code 127 displays the printer detects a problem in the fuser hot roll or back up roll fuser lamp circuits, 
fuser hot roll...

Diagnostic information2-49
  5060-4xx
128 error code
Fuser hot roll is under temperature during standby
129 error code
Fuser backup roll is under temperature during standby.Step Action and questions Yes No
1 Turn the printer on and allow it to reach a Ready 
prompt.
Note:  The printer may not complete POR and continue 
to display the 128 Error message.
Remove the fuser assembly from the printer. Measure 
the voltage on connector J33-6 on the system board. 
The voltage should measure approximately 3.3 V...

2-50Service Manual
5060-4
xx   
130 error code
Hot roll did not reach the correct standby temperature
This error displays when the fuser hot roll does not reach the correct standby temperature.
Step Action and questions Yes No 1 Measure the voltage on connector J33-11 on the 
system board.
The voltage measures approximately 0.13 V dc to 
0.64 V dc as the hot roll lamp turns off and on.
Is the voltage correct? Replace the 
“Fuser 
assembly” on 
page 4-35
. Go to step 2
2Remove the fuser from the printer....

Diagnostic information2-51
  5060-4xx
131 error code
Backup roll did not reach the correct standby temperature
Step Action and questions Yes No
1 Measure the voltage on connector J33-12 on the 
system board.
The voltage measures approximately 0.14 V dc to 
0.64 V dc as the back up roll lamp turns off and on.
Is the voltage correct? Go to step 2 Replace the 
“Fuser 
assembly” on 
page 4-35
2Remove the fuser from the printer. Check continuity of 
the backup roll lamp by measuring between pins 5 and 
2 on...

2-52Service Manual
5060-4
xx   
132 error code
Cold hot roll
Step Action and questions Yes No
1 Measure the voltage on connector J33-11 on the 
system board. The voltage should measure 
approximately +0.13 V dc to +0.64 V dc as the hot roll 
lamp turns off and on.
Is the voltage correct? Go to step 2 Replace the 
“System board” 
on page 4-72
2Remove the fuser from the printer. Check continuity of 
the hot roll lamp by measuring between pins 1 and 2 on 
the AC fuser connector on the fuser assembly.
Is...

Diagnostic information2-53
  5060-4xx
133 error code
Cold backup roll
Step Action and questions Yes No
1 Measure the voltage on connector J33-12 on the 
system board. The voltage should measure 
approximately +0.13 V dc to +0.64 V dc as the backup 
roll lamp tur ns off and on.
Is the voltage correct? Go to step 2 Replace the 
“System board” 
on page 4-72.
2Remove the fuser from the printer Check continuity of 
the backup roll by measuring between pins 1 and 5 on 
the AC fuser connector on the fuser...

2-54Service Manual
5060-4
xx   
134 error code
Hot fuser
Error code 134 indicates that the fuser is running over temperature or the hot roll fuser lamp has been on too 
long. Error code 134 may also indicate a problem in the fuser assembly with the hot roll bearings, hot roll 
thermistor, LVPS, or the system board.
135 error code
Error code 135 indicates that a problem exists in the fuser assembly with the backup roll bearings, backup roll 
thermistor, LVPS, or system board.
136 error code
Fuser...