Brother HL-5340D Service Manual page 85

HIGH-VOLTAGE POWER SUPPLY PCB FAILURE
Step
High-voltage power supply PCB
1
ASSY harness electrode dirty
High-voltage power supply PCB
2 ASSY harness connection failure
High-voltage power supply PCB
3
failure
Low-voltage power supply PCB
4
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
Link lever catching on some
1
position
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
Clean the electrodes on the High-voltage
power supply PCB ASSY harness.
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 PS PCB unit.
Replace the main PCB ASSY.
Cause
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.
Cause
Reconnect the panel PCB ASSY harness.
Replace the AC cord.
Replace the panel PCB ASSY.
Replace the PS PCB ASSY.
Replace the main PCB ASSY.
Cause
Re-assemble the link lever.
Re-assemble the pickup roller holder
ASSY catching on some position.
Replace the roller holder ASSY.
Replace the main motor.
Replace the pressure plate drive cam.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
Remedy
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