Confidential
1-60
7. OTHERS PROBLEMS
The machine is not turned on, or the LCD indication does not appear.
Step
Cause
Check
Result
Remedy
1
Harness
connection failure
of LCD panel
PCB
Is the harness of the LCD
panel PCB ASSY
connected correctly?
No
Reconnect the LCD
panel PCB ASSY
harness
2
LCD panel PCB
failure
Is the problem solved
after replacing the LCD
panel PCB ASSY?
Yes
Replace the LCD panel
PCB ASSY.
3
LCD panel failure Is the problem solved
after replacing the LCD
panel ASSY?
Yes
Replace the LCD panel
ASSY.
4
Low-voltage
power supply
failure
Is the problem solved
after replacing the PS
PCB unit?
Yes
Replace the PS PCB unit.
5
Main PCB failure
Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
The fan does not work.
(Verify the position of each fan referring to
“1.4.17 Operational Check of Fans (Function code
78)”
in Chapter 5
.)
Step
Cause
Check
Result
Remedy
1
Harness
connection failure
of the appropriate
fan
Is the harness of the
appropriate fan connected
correctly?
No
Reconnect the harness of
the appropriate fan
correctly.
2
Charge HVPS
PCB failure
Is the problem solved
after replacing the charge
HVPS PCB ASSY?
Yes
Replace the charge
HVPS PCB ASSY.
Replace the fuser unit fan
(FU) and air intake fan
(AIR).
3
Low-voltage
power supply
failure
Is the problem solved
after replacing the PS
PCB unit?
Yes
Replace the PS PCB unit.
Replace the LVPS fan
(PS).
4
Engine PCB
failure
Is the problem solved
after replacing the engine
PCB ASSY?
Yes
Replace the engine PCB
ASSY. Replace the drum
unit fan (OPC).
5
Main PCB failure
Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
Содержание HL-4040CN
Страница 265: ...Confidential 4 7 11 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Страница 320: ...Confidential 6 12 Charge High voltage Power Supply PCB Circuit Diagram 1 4 ...
Страница 321: ...Confidential 6 13 Charge High voltage Power Supply PCB Circuit Diagram 2 4 ...
Страница 322: ...Confidential 6 14 Charge High voltage Power Supply PCB Circuit Diagram 3 4 ...
Страница 323: ...Confidential 6 15 Charge High voltage Power Supply PCB Circuit Diagram 4 4 ...
Страница 324: ...Confidential 6 16 Transfer High voltage Power Supply PCB Circuit Diagram 1 2 ...
Страница 325: ...Confidential 6 17 Transfer High voltage Power Supply PCB Circuit Diagram 2 2 ...
Страница 326: ...Confidential 6 18 Low voltage Power Supply PCB Circuit Diagram 100V ...
Страница 327: ...Confidential 6 19 Low voltage Power Supply PCB Circuit Diagram 200V ...