Lexmark C752 Service Manual page 81

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.
Step Action and questions
1 Open the right fuser access door. Observe the fuser
and see if the hot roll fuser lamp turns on and off. You
may have to observe for a few minutes.
Do the lamps turn off and on?
2 Turn the printer on and 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 on and off.
Is the voltage correct?
125 error code
Hot fuser
Error code 125 displays whenever the printer detects a problem with the fuser running over temperature or the
fuser lamps have been on too long. A problem exists in the fuser assembly with the back up roll bearings, back
up roll thermistor, LVPS, or system board.
Step Action and questions
1 Open the right fuser access door. Observe the fusser
and see if the backup roll fuser lamp turns on and off.
You may have to observe for a few minutes.
Does the lamp turn off and on?
2 Turn the printer on and measure the voltage on
connector J33-12 on the system board. The voltage
should measure approximately +0.13 V ac to
+0.64 V ac as the backup roll lamp turns on and off.
Is the voltage correct?
Yes No
Go to step 2 Replace the
"LVPS
assembly" on
page
Replace Replace the
the"Fuser "System board"
assembly" on on page
page 4-32.
Yes No
Go to step 2 Replace the
"LVPS
assembly" on
page
Replace the Replace the
"Fuser "System board"
assembly" on on page
page 4-32.
Diagnostic information
5060-2XX
4-42.
4-67.
4-42.
4-67.
2-47