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Diagnostic Information 2-7
5055-01x
920 - Fuser Error - Fuser Heater Trouble
923 - Upper Fuser Thermistor Open Error
92x Service
Fuser Error
Step
Questions /
Actions
Yes No
1 Replace the fuser.
Did this fix the
problem?
Problem solved. Return the fuser,
replace the power
supply 2 and go to
step 2.
2 Did replacing
power supply 2 fix
the problem?
Problem solved. Return power supply
2 and 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 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.
Service.bk Page 7 Thursday, October 4, 2001 12:20 PM