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125 Error code
Hot fuser
The printer detects a problem with the fuser running over temperature or the backup rolls have been on too long.
A problem could exist in the fuser assembly with the backup roll bearings, backup roll thermistor, or other backup
roll parts. The LVPS or engine board assembly may also be failing.
Step
Action and questions
1
Open the right fuser access door. Observe the fuser
and see if the backup roll lamp turns on and off. You
may have to observe the fuser for a few minutes.
Does the backup roll lamp turn off and on?
2
Turn the printer on and measure the voltage on
connector J10-12 on the engine 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?
126 Error code
Hot roll thermistor or thermistor circuits are open
The printer detects a problem in the fuser hot roll, hot roll lamp circuits, fuser hot roll thermistor, engine board, or
LVPS fuser control circuits.
Step
Action and questions
Turn the printer on and allow it to reach Ready.
1
Note: The printer may not complete POR and post a
126 error message.
Remove the fuser assembly from the printer and
measure the voltage on connector J10-6 on the engine
board. See
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. The voltage should measure approximately
+3.3 V dc.
Is the voltage correct?
"Fuser connectors" on page
Yes
Go to step 2
Replace the fuser
assembly. See
"Fuser assembly
removal" on
page
4-31.
Yes
Go to step 2
5-25. The
Replace the fuser
assembly. See
"Fuser assembly
removal" on
page
4-31.
5060-00x
No
Replace the LVPS
assembly. See
"Low voltage
power supply
(LVPS) removal"
on page
4-38.
Replace the engine
board assembly.
See
"Engine
board removal"
on page
4-29.
No
Replace the engine
board. See
"Engine board
removal" on
page
4-29.
Replace the LVPS
assembly.
"Low
voltage power
supply (LVPS)
removal" on
page
4-38.
2-47
Diagnostic information
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