The Copy Has Poor Sharpness - Canon iR1600 Service Manual

CHAPTER 13 TROUBLESHOOTING

3.3.20 The copy has poor sharpness.

Sharpness setting
1) Is the sharpness setting of user mode correct?
NO:
Copyboard glass
2) Is the copyboard glass soiled with oil? Is there foreign matter on the
YES: Clean the copyboard glass.
Contact sensor
3) Clean the rod lens array of the contact sensor. Is the fault cor-
YES: End.
Gain auto adjustment
4) Execute gain auto adjustment. Is the fault corrected? (See 2.3.2 of
YES: End.
CS unit
5) Are the CS unit and the spacers mounted correctly? Also, are the
NO:
Transfer charging roller
6) Try replacing the transfer charging roller. Is the problem cor-
YES: End.
Developing assembly, Drum unit
7) Try replacing the drum unit. Is the problem corrected?
YES: End.
NO:
13-34
Set sharpness to a correct setting.
copyboard glass stay?
rected?
Chapter 13.)
spacers free of wear?
Correct the fault. If the fault is not corrected, replace the faulty
part.
rected?
Replace the developing assembly.
COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002