White Spots on black text ; and graphics at 94 mm ; Black Spots at 94 mm - Page 115

7. Troubleshooting

 107

White Spots on black text 

and graphics at 94 mm 

(3.7 in.) intervals

Black Spots at 94 mm 

(3.7 in.) intervals

„

If the problem is not solved after printing a few pages, the drum unit may have 
glue from the label stuck on the OPC drum surface.

Clean the drum unit as follows:

a

Put the print sample in front of the drum unit, and find the exact position of 
the poor print.

b

Turn the drum unit gear by hand while looking at the surface of the OPC 
drum (1).

c

When you have found the mark on the drum that matches the print sample, 
wipe the surface of the OPC drum with a cotton swab until the dust or paper 
powder on the surface comes off.

CAUTION

DO NOT clean the surface of the photosensitive drum with a sharp object.

„

The drum unit may be damaged. Put in a new drum unit. See 

Replacing the drum 

unit

 on page 80.

Examples of poor print 
quality

Recommendation

94 mm
(3.7 in.)
94 mm
(3.7 in.)

94 mm
(3.7 in.)
94 mm
(3.7 in.)

1