Ricoh FW830 Service Manual page 214

31 December 1992
1.2.3 Dirty Background Band
Vertical band?
Yes No
Horizontal band?
Yes No
The fusing rollers may be dirty if background only appears at the copy leading
edge.
⇒ Clean or replace fusing rollers.
Lead from development unit if bands occur at 37 mm intervals.
⇒ Check and fix the development bias leakage.
Drum scratch if the bands are at 251 mm intervals.
⇒ Clean or replace the drum.
Is the edge of the dirty background band sharp?
Yes No
Charge corona grid may be dirty.
⇒ Clean charge corona unit.
Exposure glass or fiber optics may be dirty.
⇒ Clean the exposure glass or fiber optics.
TROUBLESHOOTING FOR COPY IMAGE
6-5