Lexmark C910 - Upper Fuser Thermistor Open Error

2-8 Service Manual
5055-01X
923 - Upper Fuser Thermistor Open Error
924 - L60ower Fuser Thermistor Open Error
Step
Questions /
Actions
Yes No
1 Is connector CN44
on the printer
controller board
connected
properly?
Disconnect CN44
and turn the printer
on.
Go to step 2.
Plug the connector in
securely.
2 Is error 923
displayed?
Power off and
reconnect CN44.
Go to step 3.
Replace the printer
controller board.
3 Power the printer
off and short pins
1 and 4 of CN44
and power on. Is
error 923
displayed?
Replace the fuser. Replace the printer
controller board.
Step
Questions /
Actions
Yes No
1 Is connector CN44
on the printer
controller board
connected
properly?
Disconnect CN44
and turn the printer
on.
Go to step 2.
Plug the connector in
securely.
2 Is error 924
displayed?
Turn the printer off
and reconnect
CN44.
Go to step 3.
Replace the printer
controller board.