The Output Is Foggy Horizontally; The Output Has Fuzzy, Black Horizontal Lines - Canon iR1200 Series Service Manual

3.1.5 The output is foggy horizontally.

3.1.6 The output has fuzzy, black horizontal lines.

General conditions
1) Execute 'PRINT test'. Is the output image normal? (See 3.21.5 of
YES: Go through steps 4) to 8).
NO:
Transfer guide assembly
2) Clean the transfer guide assembly. Is the problem corrected?
YES: End.
Drum unit, Developing unit
3) Try replacing the drum unit. Is the fault corrected?
YES: End.
NO:
Selfoc lens array (contact sensor)
4) Clean the selfoc lens array of the contact sensor. (See 4.3.1 of Chap-
YES: End.
Contact sensor LED intensity auto adjustment
5) Execute contact sensor LED intensity auto adjustment. Is the prob-
YES: End.
Connector
6) Is the connection of the following connectors normal: J501 and
NO:
Contact sensor
7) Try replacing the contact sensor. Is the problem corrected?
YES: End.
Analog processor PCB, Image processor PCB
8) Try replacing the analog processor PCB. Is the problem corrected?
YES: End.
NO:
COPYRIGHT © 2002 CANON INC.
Chapter 2.)
Go through steps 2) to 3).
Replace the developing unit.
ter 6.)
lem corrected? (See 1.2.4.1 of Chapter 7.)
J503 on the analog processor PCB; J317 on the image processor
PCB; and J504 of the contact sensor?
Connect them firmly. If the flexible cable has a scratch, replace it.
Replace the image processor PCB.
2000 2000 2000 2000
CHAPTER 7 TROUBLESHOOTING
CANON iR1200/iR1300 Series REV. 0 AUG. 2002
7-27