Brother DCP-9010CN Service Manual page 167

Color fax/mfc
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■ White spots on one color image
<User Check>
- 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 the label or the like,
paper powder or dirt may be attached on the surface of the exposure drum. When the size
of the white spots is less than 0.35mm, feed the paper from the manual feed slot one to
three times to clean the drum. (Refer to
page.) When the size of the spots is 0.35mm or more, or when the same problem occurs
after feeding the drum cleaning sheet, wipe off the dirt on the exposure drum with a cotton
swab. (Refer to
"Drum unit cleaning" in this
- The drum unit may be damaged. Replace the drum unit with a new one.
- The belt unit may be damaged. Replace the belt unit with a new one.
Step
Cause
1
Toner cartridge
failure
2
Toner/new
sensor PCB failure
"Drum cleaning function of product" in the next
chapter.)
Check
Are the white spots at 31
mm (develop roller
circumference) intervals?
Is the "Replace Toner"
message indicated on
the LCD when replacing
the toner cartridge with
the one which has
reached the end of life?
3-75
Remedy
Result
Yes
If the develop roller
surface is scratched,
replace the toner cartridge.
No
Replace the toner/new
sensor PCB ASSY.
Confidential

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