The Copy Has White Strips; The Copy Has White Lines - Canon iR1600 Service Manual

3.3.10 The copy has white strips. (feeding direction)
3.3.11 The copy has white lines. (feeding direction)
Machine state
1) Execute 'PRINT'. Is the output image normal? (See 5.5.5 of Chap-
YES: Go to step 6.
Developing assembly
2) Is the coating of toner on the developing cylinder even?
NO:
Drum unit
3) Is there a scratch or black line in the peripheral direction of the
YES: Replace the drum unit.
Transfer charging roller, Pre-transfer static eliminator
4) Is the transfer charging roller or the pre-transfer static eliminator
YES: Clean the transfer roller or the transfer static eliminator. If the fault
Fixing assembly
5) Execute fixing roller cleaning in user mode. Is the fault corrected?
YES: End.
NO:
Gain auto adjustment
6) Execute gain auto adjustment. Is the problem corrected? (See 2.3.2
YES: End.
Contact sensor, Standard white plate
7) Clean the rod lens array of the contact sensor and the copyboard
YES: End.
Shading position correction
8) For shading position correction in service mode, set a level between
YES: End.
NO:
CS unit
9) Are the CS unit and the spacers mounted correctly? Also, are the
YES: Replace the contact sensor.
NO:
COPYRIGHT© 2002 CANON INC.
ter 13.)
Rotate the developing cylinder to see if the coating becomes even.
If not, replace the developing assembly.
surface of the photosensitive drum?
coated with foreign matter?
is not corrected, replace the transfer charging roller or the transfer
static eliminator.
Replace the fixing assembly.
of Chapter 13.)
glass (standard white plate). Is the fault corrected?
'90' and '72' for '6 SCANNER>7 CCD>parameter '19'. Is the fault
corrected?
Replace the copyboard glass. If the fault cannot be corrected, go to
step 9).
spacers free of water?
Correct the fault. If the fault cannot be corrected, replace the faulty
part.
2000 CANON iR1600/iR2000 REV.1 JAN. 2002
CHAPTER 13 TROUBLESHOOTING
13-27