Troubleshooting For Other Problems - Brother DCP-8110DN Service Manual

4.14 Troubleshooting for Other Problems

4.14.1 Machine is not turned ON
<User Check>
- Connect the AC cord correctly.
Step
Connection failure of the panel PCB
1
harness
2 Panel PCB failure
3 Touch panel PCB failure
Low-voltage power supply PCB
4
failure
5 Main PCB failure
4.14.2 Main fan does not rotate
Step
Connection failure of the main fan
1
harness
Connection failure of the toner LED
2
PCB harness
3 Main fan failure
4 Main PCB failure
4.14.3 Main motor failure
Step
Connection failure of the main
1
motor harness
2 Main motor failure
Low-voltage power supply PCB
3
failure
4 Main PCB failure
4.14.4 Unusual noise is generated from the machine
<User Check>
- Check that the covers are closed correctly.
- Set the duplex tray correctly.
- Set the paper trays correctly.
Step
Possible cause differs depending
1 on the location. Identify the location
with the problem
2 Insufficient grease on parts
3 Bent or defective part
4.14.5 Malfunction of the memory
<User Check>
- Replace DIMM.
Step
1 Main PCB failure
Cause
Check the connection of the panel PCB
harness, and reconnect it if necessary.
Replace the panel PCB ASSY.
Replace the touch panel PCB ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Check the connection of the main fan
harness, and reconnect it if necessary.
Check the connection of the toner LED PCB
harness, and reconnect it if necessary.
Replace the main fan.
Replace the main PCB ASSY.
Cause
Check the connection of the main motor
harness, and reconnect it if necessary.
Replace the main motor ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
When the location with the problem is
identified, check for any foreign object
around that location.
Re-grease the parts.
Replace the part.
Cause
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
Remedy
Remedy
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