Lexmark C752 Service Manual page 82

5060-2XX
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.
Step Action and questions
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?
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?
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
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?
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.
2-48
Service Manual
Yes No
Go to step 2 Replace the
"System board"
on page
Replace Replace the
the"Fuser "LVPS
assembly" on assembly" on
page 4-32. page 4-42
Yes No
Go to step 2 Replace the
"System board"
on page
Replace the Replace the
"Fuser "LVPS
assembly" on assembly" on
page 4-32. page 4-42
4-67.
4-67.