3-75
Confidential
■ 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 “Drum cleaning function of product” in the next
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 chapter.)
- 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 Check
Result
Remedy
1 Toner cartridge
failure
Are the white spots at 31
mm (develop roller
circumference) intervals?
Yes
If the develop roller
surface is scratched,
replace the toner cartridge.
2 Toner/new
sensor PCB failure
Is the “Replace Toner”
message indicated on
the LCD when replacing
the toner cartridge with
the one which has
reached the end of life?
No Replace the toner/new
sensor PCB ASSY.
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