Ricoh FT5233 Service Manual page 355

COPY QUALITY
- Action -
Make a copy in reduction mode at manual image density level 4.
Is the non-image area dirty?
Yes No
Perform the forced VL detection (SP70).
No good
Clean the optics and perform the forced V
target lamp voltage (SP51) does not change.
Is the target lamp voltage (SP51) in the range between 80 and 85 V?
No
It is recommended to change the exposure lamp due to deterioration.
If dirty background still appears, does dc power supply board apply
proper lamp voltage at CN401-1 and CN401-3?
Yes
Replace the dc power supply board.
Clean the ID and V sensors and adjust them by SP54.
Perform the forced V
(SP51) does not change.
If dirty background still appears, is the development bias applied to
the development roller shaft?
No
Confirm that the drum is properly grounded.
Yes
No
detection (SP70) till the target lamp voltage
L
Yes
detection (SP70) till the
L
6-6
12 February 1992