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CHAPTER 7 TROUBLESHOOTING
4.3
Troubleshooting Malfunctions
(if equipped with ADF functions)
4.3.1
Original pickup fails.
General conditions
1) Does the ADF motor rotate?
YES: Go through steps 2) through 4).
NO:
Go to step 5) through 6).
General conditions
2) Is the original feedlseparation roller rotating?
NO:
Check the gear and timing belt used to transmit the drive of the
ADF
motor (M3).
If
scratched, replace it.
Original pickup roller descentloriginal stopper ascent mechanism
3) Does the original pickup roller move down and the original stop-
.
per move up during original pickup?
NO:
Check the parts of the original fdseparation roller unit, and correct
any fault. If scratched, replace it.
Rollers (separation roller unit)
4)
Is the surface of each roller of the separation roller unit normal?
NO:
Replace the faulty roller.
ADF motor (connection)
5) Is
the ADF motor harness connected firmly?
NO:
Connect it firmly.
ADF motor (M3), Image processor
PCB
6) Try replacing the ADF motor (M3). Is the problem corrected?
YES: End
NO:
Replace the image processor PCB.
COWRIGHT02002 CANON INC.
CANON P C l ~ m a g e C L A S S D800s REV.
1 AUG.2002
7-47
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