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CHAPTER 6 TROUBLESHOOTING
6-32
I-11 Faulty registration
Possible cause Step Check Result Remedy
Excessive paper
load
1 Is the paper loaded in the
paper cassette more than
27mm high?
Yes Instruct the user to keep paper
loads below 27mm in depth.
Print paper 2 Is the specified weight of the
recommended paper being
used?
No Recommend to use the specified
types of paper.
3 Is the first printing position
within ±1mm of the tolerance
specification?
Yes Adjust the Y offset by using the
utility software supplied.
Rear resist
sensor position
incorrect
4 Is the position of the rear
registration sensor normal?
No Reposition the sensor to the
correct position.
I-12 Poor fixing
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.
Toner sensing
failure
(When printing
is faint.)
2 Is the problem solved by
replacing the drum unit or the
toner cartridge?
Yes 1) Toner is empty.
2) The toner sensing is
defective. Clean the toner
sensor.
3) If the wiper in the toner
cartridge is broken, replace
the toner cartridge with a new
one.
Thermistor
failure
3 Is the thermistor fitted
correctly?
No Fit the thermistor correctly.
Low-voltage
power supply
PCB failure
4 Is the problem solved by
replacing the low-voltage
power supply PCB?
Yes Replace the low-voltage power
supply PCB.