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4.7 Troubleshooting for Other Problems
4.7.1 Machine does not turn ON or LED does not light
4.7.2 Top cover is open
Open top cover was detected.
4.7.3 Unusual noise is coming from the machine
<User Check>
- Press and hold the button and check if the machine turns ON.
- Plug the AC cord into a socket.
Step Cause Remedy
1
Connection failure of the high
voltage PCB harness
Reconnect the high voltage PCB harness.
2
Connection failure of the low
voltage PCB harness
Reconnect the low voltage PCB harness.
3
LED failure Replace the high voltage power supply PCB
ASSY.
4
Low voltage power supply PCB
failure
Replace the low voltage power supply PCB
unit.
5 Main PCB failure Replace the main PCB ASSY.
<User Check>
- Check that the top cover is closed.
Step Cause Remedy
1
Connection failure of the laser unit
flat cable
Reconnect the laser unit flat cable.
2
Connection failure of the eject
sensor PCB harness
Reconnect the eject sensor PCB harness.
3
Connection failure of the paper
feed/paper printing position sensor
PCB harness
Reconnect the paper feed/paper printing
position sensor PCB harness.
4
Eject actuator caught in sections of
the machine
Reattach the eject actuator.
5
The rib inside the top cover (which
presses the eject actuator or laser
shutter arm) is broken.
Replace the top cover ASSY.
6 Eject sensor failure Replace the eject sensor PCB ASSY.
7
Paper feed/paper printing position
sensor PCB failure
Replace the paper feed/paper printing
position sensor PCB ASSY.
8
Faulty laser shutter arm of the laser
unit
Replace the laser unit.
9 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1
Possible cause differs depending
on the location. Identify the location
with the problem first.
When the location with the problem is
identified, check if there is a foreign object
around that location (replace the parts
around the location if necessary).
2 Insufficient grease on parts Re-grease the parts.
3 Bent or defective part Replace the part.
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