Ricoh FT4460 Service Manual page 342

7. In ADS Mode, VDE (reflected light from white original) is too high.
8. The ADS optical fiber is cut or bent.
- Actions -
1. Dirty optics.
(1) Wipe the toner shield glass with a soft dry cloth.
(2) Clean the exposure glass and mirrors 1 to 5.
If necessary, clean the 6th mirror and both erase filters. In addition, clean
the charge corona unit (charge wire, grid, casings), and set the lamp
voltage to give proper exposure.
2. When the cover of the transfer corona end block is dirty, toner density
increases; this results in scattering. (For details, see section 18).
3 . Check the mylar strip and side seals on the development unit.
4.
Check the exposure lamp and replace if deteriorated. If the exposure
lamp has no defects, adjust the exposure lamp voltage (SP Mode No. 48)
and ADS (SP Mode No. 58).
NOTE: Set the exposure lamp voltage so that level 2 of the OS-A-3 test
chart is slightly visible at ID level 4 (manual ID selection). Then adjust
the ADS.
(1) Set ID level 4.
(2) Adjust ADS to 3 ± 0.1V by turning VR101 in SP Mode No.56.
(3) Set ADS standard memory in SP Mode No.56.
Press the Start key in SP Mode No.56 and perform at least five scans.
(Stop by pressing the Clear/Stop key.)
5. If the developer adheres to the copy
image, perform the following. (Note
that toner can also adhere to the
image when the toner density is too
low.)
(1) Remove the developer from the
development unit.
(2) Adjust the doctor gap.
(3) Put new developer in the
development unit and condition
the mixture (SP Mode No.65).
12-5
28 February 1989