Confidential
9-39
(I-15) White spots
User Check
(1) If the problem is not solved after printing a few pages, the drum unit may
have glue from label stock on the exposure drum surface. Refer to Step 1
in the table below and NOTE in the next page.
(2) The drum unit may be damaged. Install a new drum unit.
Possible cause
Step
Check
Result
Remedy
1 Are the white spot at
94.2mm intervals?
Yes
1) If toner or glue remains stuck,
wipe it off gently with a cotton
swab. (Refer to NOTE in the
next page.)
2) If the drum surface is
scratched, replace the drum
unit.
Drum unit
failure
2 Is the problem solved after
replacing the drum unit?
Yes Replace the drum unit.
No toner 3 Is the toner in the toner
cartridge almost empty?
Yes Replace the toner cartridge with a
new one.
Print paper 4 Is the problem solved after
changing to specified
freshly unpacked paper?
No Damp (wet) paper might be used.
Recommend to change freshly
unpacked paper.
Environment 5 Does the problem still
appear after the machine
has warmed up?
Yes
1) Replace the drum unit.
2) Advise the user of the specified
machine environment
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