6 - 21; White Spots on black text and ; graphics at 94 mm - Page 153

6 - 21   TROUBLESHOOTING

White Spots on black text and 

graphics at 94 mm 

(3.7 in.) intervals

Black Spots at 94 mm 

(3.7 in.) intervals

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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.

Caution

Do not try to clean the surface of the photosensitive drum with a sharp 
object, such as a ball-point pen, and so on.

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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

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

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