6 - 12; White Spots on black text and ; graphics at 75 mm - Page 83

Troubleshooting

6 - 12

6

White Spots on black text and 

graphics at 75 mm 

(3.0 in.) intervals

Black Spots at 75 mm 

(3.0 in.) intervals

■

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

Clean the drum unit as follows:

1

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

2

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

3

When you have located 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.

Note

Do not try to 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 5-8.

Examples of poor print 
quality

Recommendation

75 mm
(3.0 in.)
75 mm
(3.0 in.)

75 mm
(3.0 in.)
75 mm
(3.0 in.)