Low Voltage Power Supply Pcb Assy Failure; Other Problems; The Printer Is Not Turned On, Or The Led Indication Does Not Appear; The Fan Motor 60 Assy Does Not Rotate - Brother HL-2250DN Service Manual

4.8.5 Low voltage power supply PCB ASSY failure

User Check
• Turn the power off and on.
Step
Harness connection failure of low
1 voltage power supply PCB ASSY
Low voltage power supply PCB
failure
2
3 Main PCB failure
CAUTION :
• The irregular power supply detection error (After blinking the Toner/Drum/Error/Ready
LED, the Toner/Drum/Error LED light up by pressing the [Go] button once. ) occurs
when there is a large fluctuation in the power supply voltage supplied to the printer.
In this case, if the same power supply is used, the same error might occur again even
if the low voltage power supply PCB ASSY is replaced.
4.9

Other Problems

4.9.1 The printer is not turned on, or the LED indication does not appear.

User Check
• Replace the AC power cord.
Step
Harness connection failure of panel
1
PCB ASSY
2 Panel PCB failure
Low voltage power supply PCB
3
ASSY failure
4 Main PCB failure

4.9.2 The Fan motor 60 ASSY does not rotate.

Step
Harness connection failure of the
1
fan motor 60 ASSY
2 Fan motor 60 ASSY failure
Harness connection failure of high
3
voltage power supply PCB
High voltage power supply PCB
4
ASSY failure
5 Main PCB failure
Cause
Cause
Cause
2-46
Remedy
Check the harness connection of the low
voltage power supply PCB ASSY, and
reconnect it.
Replace the low voltage power supply
PCB ASSY. However, in the case of the
irregular power supply detection error,
reset the irregular power supply detection
counter following the procedure described
in "3.1 Reset of Irregular Power Supply
Detection Counter" in Chapter
Replace the main PCB ASSY.
Remedy
Reconnect the harness of the panel PCB
ASSY correctly.
Replace the panel PCB ASSY.
Replace the low voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Remedy
Reconnect the harness of the fan motor
60 ASSY correctly.
Replace the fan motor 60 ASSY.
Reconnect the harness of the high
voltage power supply PCB ASSY.
Replace the high voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
4.
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