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CHAPTER 7 TROUBLESHOOTING
Confidential
7-3
5
I-11 Faulty
registration
Possible cause
Step
Check
Result
Remedy
Excessive paper
load
1
Is the paper loaded in the
paper tray more than 27mm
high?
Yes
Instruct the user to keep paper
loads below 27mm in depth.
2
Is the specified weight of the
recommended paper being
used?
No
Recommend to use the
specified types of paper.
Print paper
3
Is the first printing position
within ±1mm of the tolerance
specification?
Yes
Adjust the Y offset by using the
utility software supplied.
Regist rear
sensor position
incorrect
4
Is the regist rear sensor off
from the correct position?
Yes
Reposition the sensor to the
correct position.
Drum unit failure
5
Is the rotation torque of the
drum unit heavy?
Yes
Replace the drum unit.
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 sensor
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 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.
Fixing unit
thermistor
failure
3
Is the thermistor fitted
correctly?
No
Fit the thermistor correctly.
Low-voltage
power supply
4
Is the problem solved by
replacing the low-voltage
Yes
Replace the low-voltage power
supply PCB.