Fan Failure - Konica Minolta Bizhub 20p Service Manual

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■ HIGH-VOLTAGE POWER SUPPLY PCB FAILURE
Step
High-voltage power supply PCB
1
ASSY electrode dirty
High-voltage power supply PCB
2
ASSY harness connection failure
High-voltage power supply PCB
3
failure
4
LVPS PCB failure
5
Main PCB failure

■ FAN FAILURE

Step
Fan harness connection failure
1
2
Fan failure
3
Toner LED PCB failure
4
Main PCB failure
■ NO POWER SUPPLIED
Step
Harness connection failure of
1
panel PCB
2
AC cord failure
3
Panel PCB failure
4
LVPS PCB failure
5
Main PCB ASSY failure
■ PICKUP FUNCTION OF PAPER TRAY DOES NOT WORK
Step
1
Lift arm catching on some position Re-assemble the lift arm.
Pickup roller holder ASSY
2
catching on some position
3
Roller holder ASSY failure
4
Main motor failure
5
Pressure plate drive cam failure
6
Main PCB ASSY failure
Cause
Cause
Cause
Cause
3-25
Remedy
Clean the electrodes on the High-voltage
power supply PCB ASSY.
Check the harness connection between the
high-voltage power supply PCB and main
PCB. Then reconnect it.
Replace the high-voltage power supply
PCB ASSY.
Replace the LVPS PCB unit.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the fan
motor 60 unit, and reconnect it.
Replace the fan motor 60 unit.
Replace the toner LED PCB ASSY.
Replace the main PCB ASSY.
Remedy
Reconnect the panel PCB ASSY harness.
Replace the AC cord.
Replace the panel PCB ASSY.
Replace the LVPS PCB ASSY.
Replace the main PCB ASSY.
Remedy
Re-assemble the pickup roller holder
ASSY catching on some position.
Replace the roller holder ASSY.
Replace the main motor.
Replace the frame L.
Replace the main PCB ASSY.
Confidential

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