Confidential
1-54
One color spots or dirt
User Check
- Damp (wet) paper might be used. Try changing to freshly unopened paper.
- Toner may be empty. Replace the toner cartridge with a new one.
- If the same problem occurs after printing a few pages, the adhesive of a label or the like,
paper powder or dirt may be attached on the surface of the exposure drum.
Feed the drum cleaning sheet from the MP tray one to three times to clean the drum.
(For the procedure, refer to
When the same problem occurs after feeding the drum cleaning sheet, wipe off the dirt on the
exposure drum with a cotton swab.
(For the procedure, refer to
- The drum unit may be damaged. Replace the drum unit with a new one.
Step
Cause
Check
Result
Remedy
1
Drum unit failure
Are the spots at 75.0 mm
(exposure drum
circumference) intervals?
Yes
If the surface of the
exposure drum is
scratched, replace the
drum unit.
2 Drum
unit
connection failure
Are the electrodes on the
drum unit and machine
body dirty?
Yes
Clean both electrodes
3
Fuser unit failure
Are the spots at 78.5mm
(heat roller
circumference) intervals?
Yes
Replace the fuser unit.
4 Transfer
HVPS
PCB failure
Is the problem solved after
replacing the transfer
HVPS PCB ASSY?
Yes
Replace the Transfer
HVPS PCB ASSY.
5 Charge
HVPS
PCB failure
Is the problem solved
after replacing the charge
HVPS PCB ASSY?
Yes
Replace the charge
HVPS PCB ASSY.
One color band
User Check
- Clean the inside of the machine and the corona wire in the drum unit. If the same problem
occurs after cleaning, replace the drum unit with a new one.
- The paper tray ground terminal provided in the machine body may be dirty. Clean the contact
with a dry cloth.
Summary of Contents for DCP-9040CN
Page 309: ...Confidential 4 5 8 Alert warning message of WHQL appears Click Continue Anyway to proceed ...
Page 325: ...Confidential 5 6 Color scanning Fig 5 2 ...
Page 342: ...Confidential 5 23 Cover page sample Fig 5 13 End page sample Fig 5 14 ...
Page 365: ...Confidential 6 2 Charge High voltage Power Supply PCB Circuit Diagram 2 4 ...
Page 366: ...Confidential 6 3 Charge High voltage Power Supply PCB Circuit Diagram 3 4 ...
Page 367: ...Confidential 6 4 Charge High voltage Power Supply PCB Circuit Diagram 4 4 ...
Page 368: ...Confidential 6 5 Transfer High voltage Power Supply PCB Circuit Diagram 1 2 ...
Page 369: ...Confidential 6 6 Transfer High voltage Power Supply PCB Circuit Diagram 2 2 ...
Page 370: ...Confidential 6 7 Low voltage Power Supply PCB Circuit Diagram 100V ...
Page 371: ...Confidential 6 8 Low voltage Power Supply PCB Circuit Diagram 200V ...
Page 373: ...Confidential 6 10 Filter PCB Circuit Diagram ...