Lexmark C78x User Manual

2-24 Service Manual
5061
122.11 error code service check
Fuser hot roll is under temperature during standby
122.12 error code service check
Cold fuser
If error code 122.08 displays, the printer has detected a problem in the fuser hot roll lamp circuity, fuser hot roll
thermistor, system board, or LVPS fuser control circuits.
Replace the following FRUs in the order shown:
1. Fuser assembly. See “Fuser assembly removal” on page 4-44.
2. LVPS assembly. See “LVPS assembly removal” on page 4-53.
3. System board. See “System board removal” on page 4-90.
122.13 error code service check
Secondary hot roll thermistor circuit is open
If error code 122.13 displays the printer detects a problem in the fuser secondary hot roll, fuser hot roll
thermistor, system board, or LVPS fuser control circuits.
Step Actions and questions Yes No
1 Turn the printer on, and allow it to reach a Ready
prompt.
Note: The printer may not complete POR and continue
to display the 122.11 Error message.
Remove the fuser assembly 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 2 Replace the
system board.
See “System
board removal”
on page 4-90.
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. See
“Fuser
assembly
removal” on
page 4-44.
Replace the
LVPS assembly.
See “LVPS
assembly
removal” on
page 4-53.
Step Actions and questions Yes No
1 Turn the printer on, and allow it to reach Ready.
Note: The printer may not complete POR and post a
122.13 Error message.
Measure the voltage on connector J17-7 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.
See “System
board removal”
on page 4-90.
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. 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