CHAPTER 4 TROUBLESHOOTING
Confidential
4-48
(I-12) Poor fixation
Possible cause
Step
Check
Result
Remedy
Print paper
1
Is thick paper of more than
43lb being used?
Yes
Recommend to use the
specified types of paper.
Nip release
lever
2
Does the position of the nip
release levers in the fuser unit
decompress the nip pressure?
Yes
Return the nip release levers to
the original position.
Toner sensor
failure
(When printing
is faint.)
3
Is the problem solved by
replacing the drum unit or the
toner cartridge?
Yes
1) Toner is empty.
2) The toner sensor is defective.
Clean the toner sensor.
3) If the wiper in the toner
cartridge is broken, replace
the toner cartridge with a new
one.
Fuser unit
thermistor failure
4
Is the thermistor fitted
correctly?
No
Replace the fuser unit.
Low-voltage
power supply
PCB failure
5
Is the problem solved by
replacing the low-voltage
power supply PCB?
Yes
Replace the low-voltage power
supply PCB.
•
Open the back cover and fuser cover. Push down the blue tab (1). Repeat this process on the
other side. Make sure that the top of the tab and the white lever (2) are not level with each
other. Close the back cover and try printing again.
1
2
2
1
Fig. 4-20