Lexmark C760 - Page 84

2-48 Service Manual
5060-4xx
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 thermistor, back up roll thermistor, system board, or LVPS fuser control circuits.
Step Action and questions Yes No
1 Turn the printer on and allow it to reach the Ready
prompt.
Note: The printer may not complete POR and post a
126 Error message.
Measure the voltage on connector J33-6 on the system
board. The voltage should measure approximately
+3.3 V dc.
Is the voltage correct?
Go to step 2 Replace the
“System board”
on page 4-72.
2
Measure the voltage on the fuser DC control connector
on the LVPS. Measure the voltage on pin 6 of the
connector.
Does the voltage measure approximately +3.3 V dc?
Replace
the“Fuser
assembly” on
page 4-35.
Replace the
“LVPS
assembly” on
page 4-46
Step Action and questions Yes No
1 Turn the printer on and allow it to reach the Ready
prompt.
Note: The printer may not complete POR and post a
127 Error message.
Measure the voltage on connector J33-7 on the system
board. The voltage should measure approximately
+3.3 V dc.
Is the voltage correct?
Go to step 2 Replace the
“System board”
on page 4-72.
2
Measure the voltage on the fuser DC control connector
on the LVPS. Measure the voltage on pin 7 of the
connector.
Is the voltage measure approximately +3.3 V dc.
Replace the
“Fuser
assembly” on
page 4-35.
Replace the
“LVPS
assembly” on
page 4-46