3-54
Confidential
■
Dirt on the back of paper
■
Vertical streaks
■
Black vertical streaks in a light background
<User Check>
- This problem may disappear after printing approximately
10 pages of completely blank sheets.
Step
Cause
Check
Result
Remedy
1
Scratch and Dirt
on the fuser unit
Is the pressure roller
ASSY dirty? Is any other
area in the machine dirty?
Yes
Print approximate 10 pages.
No
Replace the fuser unit.
2
Scratch and Dirt
in the paper feed
system
Is the paper feed system
dirty?
Yes
Wipe dirt off.
<User Check>
- This problem may occur with noise which is caused by dirt
on the corona wire in the drum unit. In this case, clean the
corona wire with the wire cleaner.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step
Cause
Check
Result
Remedy
1
Scratch and Dirt
in the paper feed
system
Is the paper feed system
dirty?
Yes
Wipe dirt off.
2
Scratch and Dirt
on the exposure
drum
Are there scratch and
dirt on the surface of the
exposure drum?
Yes
Replace the drum unit.
3
Scratch and Dirt
on the heat roller
Are there scratch and
dirt on the surface of the
heat roller?
Yes
Replace the fuser unit.
CAUTION :
• If the machine prints the same pattern, especially including vertical streaks,
continuously, black vertical streaks may appear on the paper since the electrostatic
performance of the exposure drum is decreased temporally.
<User Check>
- Clean the inside of the machine and the corona wire in the drum
unit.
- Replace the toner cartridge with a new one.
Step
Cause
Check
Result
Remedy
1
Drum unit failure
Is the problem solved after
replacing the drum unit?
Yes
Replace the drum unit.
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 ...