User Check- Page 156

CHAPTER 6  TROUBLESHOOTING

6-34

I-15

White spots

Possible cause

Step

Check

Result

Remedy

Drum unit failure

1

Are the white spot at 94mm
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 photosensitive 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.