CHAPTER 13 TROUBLESHOOTING
COPYRIGHT
©
2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002
13-24
3.3.4 The copy has uneven density. (darker along front)
3.3.5 The copy has uneven density. (lighter along front)
Image density
1) Is the image density setting appropriate?
NO: Correct the image density setting.
Machine state
2) Execute ‘PRINT’. Is the output image normal? (See 5.5.5 of Chap-
ter 13.)
YES: Go to step 7.
Developing assembly
3) Is the developing assembly locked to the photosensitive drum
firmly? (Check to see if the rolls of the developing assembly are
firmly in contact.)
NO: Mount the developing assembly correctly.
Transfer charging roller
4) Clean the transfer charging roller. Is the fault corrected?
YES: End.
Transfer charging roller
5) Try replacing the transfer charging roller. Is the fault corrected?
YES: End.
Drum unit
6) Try replacing the drum unit. Is the fault corrected?
YES: End.
Contact sensor (rod lens array)
7) Clean the rod les array of the contact sensor. Is the fault corrected?
YES: End.
Gain auto adjustment
8) Execute gain auto adjustment. Is the fault corrected? (See 2.3.2 of
Chapter 13.)
YES: End.
CS unit
9) Are the CS unit an the spacers mounted correctly? Also, are the
spacers free of wear?
YES: Replace the contact sensor.
NO: Correct the fault. If the correction is not possible, replace the faulty
part.
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