Others Problems - Brother HL-2440 Service Manual

7.

OTHERS PROBLEMS

■ The machine is not turned on, or the LED indication does not appear.
Step
Harness
connection
1
failure of panel
PCB
Panel PCB
2 failure
LVPS PCB failure Is the problem solved
3
Main PCB failure Is the problem solved
4
■ The fan does not work.
Step
Harness
connection
1
failure of the fan
motor 60 ASSY.
Toner LED PCB
2 ASSY failure
Main PCB failure Is the problem solved
3
Cause
Is the harness of the
panel PCB ASSY
connected correctly?
Is the problem solved
after replacing the panel
PCB ASSY?
after replacing the PS
PCB unit?
after replacing the main
PCB ASSY?
Cause
Is the harness of the fan
motor 60 ASSY
connected correctly?
Is the problem solved
after replacing the toner
LED PCB ASSY?
after replacing the main
PCB ASSY?
Check Result
No
Yes
Yes
Yes
Check Result
No
Yes
Yes
1-38
Remedy
Reconnect the panel PCB
ASSY harness.
Replace the panel PCB
ASSY.
Replace the PS PCB unit.
Replace the main PCB
ASSY.
Remedy
Reconnect the harness of
the fan motor 60 ASSY
correctly.
Replace the toner LED
PCB ASSY.
Replace the main PCB
ASSY.
Confidential