Others Problems; The Printer Is Not Turned On, Or The Lcd Indication Does Not Appear; The Fan Does Not Work (Error Code 2B, Ec) - Brother HL-4140CN Service Manual

3.8

Others Problems

3.8.1

The printer is not turned ON, or the LCD indication does not appear

Step
1
2
3
4
5
6
7
8
9
10
3.8.2

The fan does not work (Error code 2B, EC)

Step
1
2
3
4
5
6
Cause
AC cord failure
Harness connection failure of
panel PCB ASSY
Harness connection failure of
LCD
LCD failure
Inlet harness ASSY failure
Low-voltage power supply
PCB failure
Panel PCB failure
Engine PCB failure
High-voltage power supply
PCB failure
Main PCB failure
Cause
Harness connection failure of
the appropriate fan
Failure of the appropriate fan
Engine PCB failure
High-voltage power supply
PCB failure
Low-voltage power supply
PCB failure
Main PCB failure
Replace the AC cord.
Reconnect the panel PCB ASSY harness.
Reconnect the LCD harness.
Replace the LCD ASSY.
Replace the inlet harness ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the panel PCB ASSY.
Replace the engine PCB ASSY.
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Reconnect the harness of the appropriate fan
correctly.
Replace the appropriate fan.
Replace the engine PCB ASSY.
Replace the high-voltage power supply PCB
ASSY.
Replace the low-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
2-112
Remedy
Remedy
Confidential