Lexmark C78x User Manual

2-20 Service Manual
5061
122.04 error code service check
Cold hot roll
Step Actions and questions Yes No
1 Measure the voltage on connector J17-11 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.
See “System
board removal”
on page 4-90.
2
Remove 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 there continuity?
Go to step 4 Go to step 3
3
Check to make sure the hot roll lamp is installed
correctly.
Is the hot roll lamp installed correctly?
Go to step 4 Install the lamp
correctly. If this
does not fix the
problem, replace
the fuser
assembly. See
“Fuser
assembly
removal” on
page 4-44.
4
Reinstall the fuser assembly. Watch to see if the lamps
turn on and off as the lamp heats up.
Do the lamps turn on?
Go to step 5 Replace the fuser
assembly. See
“Fuser
assembly
removal” on
page 4-44.
5
Turn the printer on, and allow it to reach a Ready
prompt.
Note: The printer may not complete POR and may
continue to display the error code.
Remove the fuser from the printer. Measure the
voltage on connector J17-6 on the system board. The
voltage should measure approximately 3.3 V dc.
Is the voltage correct?
Go to step 6 Replace the
system board.
See “System
board removal”
on page 4-90.
6
Measure the voltage on the fuser DC control connector
on the LVPS. Measure the voltage on pin 6 of the
connect.
Does the voltage measure approximately +3.3 V dc?
Replace the fuser
assembly. See
“Fuser
assembly
removal” on
page 4-44.
Replace the
LVPS assembly.
See “LVPS
assembly
removal” on
page 4-53.

Lexmark C78x Specifications

General

Brand	Lexmark
Model	C78x
Category	Printer
Language	English