CHAPTER 4 TROUBLESHOOTING
Confidential
4-50
(I-15) White spots
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?
Yes
Damp (wet) paper might be
used. Recommend to change
freshly unpacked paper.
Environment 5 Does the problem still appear
after the printer has warmed
up?
Yes 1) Replace the drum unit.
2) Advise the user of the
specified print environment.
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.
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