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
■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.
■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.)