Dirty Background - Ricoh FW830 Service Manual

31 December 1992

1.2 DIRTY BACKGROUND

1.2.1 Dirty Background (entire Copy Image)
Is the original background pure white?
Yes No
Was ADS or Manual ID control selected?
ADS Manual
Is image density of solid areas high?
Yes
Toner density in the development unit may be too high.
⇒ Change the ID sensor bias position from 0 to 1.
ADS is not adjusted properly.
⇒ Adjust ADS.
Do dirty backgrounds still occur at lighter exposure setting?
Yes No
Light intensity may be too low.
⇒ Clean the optics and adjust light intensity if necessary.
Is the image density of solid areas high?
Yes No
Light intensity may be too low.
⇒ Clean optics and adjust light intensity if necessary.
Toner density in the development tank may be too high.
⇒ Change ID sensor bias position from 0 to 1.
No
Light intensity may be too low.
⇒ Clean the optics and adjust light intensity if necessary.
TROUBLESHOOTING FOR COPY IMAGE
6-3