Brother DCP-7030, Руководство по обслуживанию

Страница: 58 / 315

1-40
Confidential
■
Black spots
■
Black band
User Check
• Damp (wet) paper might be used. Try to change to freshly unpacked
paper.
• Toner may be empty. Replace the toner cartridge with a new one.
• If the problem is not solved after printing a few pages, the drum unit
may have glue from label stuck on the exposure drum surface.
Refer to the
previous page , and wipe it off gently with a cotton swab.
• The drum unit may be damaged. Replace the drum unit with a new
one.
Step Cause Check Result Remedy
1
Toner attached
on the develop
roller Are the black spots at
40.6 mm (develop roller
circumference)
intervals?
Yes
This problem will
disappear by printing
approximate 10 pages. If
the same problem occurs,
replace the toner cartridge.
2
Scratch and Dirt
on the exposure
drum Are the black spots at
75.0 mm (exposure
drum circumference)
intervals?
Yes
Replace the drum unit.
3
Drum unit
connection
failure Are the electrodes on
the drum unit and
machine body dirty?
Yes
Clean both electrodes
(Refer to
Fig. 1-1, Fig. 1-2. ).
4
Scratch and Dirt
on the heat roller Are the black spots at
78.5 mm (heat roller
circumference)
intervals?
Yes
Replace the fuser unit.
5
HVPS PCB
failure Is the problem solved
after replacing the
HVPS PCB ASSY?
Yes
Replace the HVPS PCB
ASSY.
6
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
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 located in the machine body may be
dirty. Clean the contact with a dry cloth.