Lexmark C752 Service Manual page 80

5060-2XX
121 error code
This error code displays whenever an incorrect fuser backup roll lamp is installed.
Step Action and questions
1 Check to make sure that the line voltage to the printer
matches the setting of the line voltage selection switch
on the LVPS.
Does the line voltage match the line voltage selection?
2 Is the correct fuser assembly installed in the printer?
3 Check for continuity between pins 2 and 5 on the AC
fuser connector on the fuser assembly.
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
2.
"LVPS assembly" on page
3.
"System board" on page
123 error code
Cold fuser
If error code 123 is displays, the printer detects a problem in the fuser hot roll lamp circuits, back up roll fuser
lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS fuser control circuits.
Replace the FRUs in the following order.
1.
"Fuser assembly" on page
2.
"LVPS assembly" on page
3.
"System board" on page
2-46
Service Manual
4-32.
4-42.
4-67.
4-32.
4-42.
4-67.
Yes No
Go to step 2 Set the line
voltage selection
switch to match
the line voltage to
the printer.
Go to step 3 Replace the
"Fuser
assembly" on
page 4-32
the correct fuser
assembly.
Replace the Replace
"LVPS the"Fuser
assembly" on assembly" on
page 4-42. page
with
4-32.