3-85
Confidential
13. OTHERS PROBLEMS
■
The machine is not turned on, or the LCD indication does not appear.
■
The fan does not work.
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 LVPS
PCB unit?
Yes
Replace the LVPS PCB
unit.
5
Main PCB
Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
(Verify the position of each fan referring to
Operational Check of Fans (Function
.
)
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 LVPS
PCB unit?
Yes
Replace the LVPS PCB
unit. Replace the LVPS fan
(PS).
4
Main PCB
Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
Summary of Contents for DCP 8085DN
Page 13: ...CHAPTER 1 SPECIFICATIONS ...
Page 52: ...Confidential CHAPTER 2 THEORY OF OPERATION ...
Page 69: ...2 16 Confidential 3 3 Paper Feeding Fig 2 18 LT path DX path MP path Paper tray path ...
Page 89: ...CHAPTER 3 ERROR INDICATION AND TROUBLESHOOTING ...
Page 178: ...Confidential CHAPTER 4 PERIODICAL MAINTENANCE ...
Page 248: ...CHAPTER 5 DISASSEMBLY REASSEMBLY ...
Page 265: ...5 12 Confidential Fig 5 7 EM2 4 places Separation pad ASSY ...
Page 501: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 507: ...6 5 Confidential 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 516: ...CHAPTER 7 SERVICE MODE ...
Page 525: ...7 7 Confidential For color scanning Fig 7 2 ...
Page 527: ...7 9 Confidential For white and black scanning Fig 7 3 ...
Page 528: ...7 10 Confidential For color scanning Fig 7 4 ...
Page 567: ...Confidential CHAPTER 8 CIRCUIT DIAGRAMS WIRING DIAGRAM ...
Page 569: ...8 1 Confidential 1 CIRCUIT DIAGRAMS High voltage Power Supply PCB Circuit Diagram Fig 8 1 ...
Page 570: ...8 2 Confidential LVPS PCB Circuit Diagram 230V Fig 8 2 ...
Page 571: ...8 3 Confidential LVPS PCB Circuit Diagram 115V Fig 8 3 ...