E421; E422 (Ir8500); E422 (Ir7200) - Canon iR8500 Service Manual

4.1.53 E421 (Indicated if iR7200)
ADF controller PCB
1) Replace the ADF controller PCB.

4.1.54 E422 (iR8500)

Communication cable
1) Is the communication cable between the machine and the copier
NO:
Connector
2) Is the connector (J1) on the ADF controller PCB connected prop-
NO:
Cable
ADF controller PCB
3) Is the cable from the connector (J1) of the ADF controller PCB to
NO:
YES: Replace the ADF controller PCB.

4.1.55 E422 (iR7200)

Communication cable
1) Is the cable between host machine and the machine connected nor-
NO:
Connector
2) Is the connector (J1) on the ADF controller PCB connected nor-
NO:
Cable, ADF controller PCB
3) Is the cable from the connector (J1) on the ADF controller PCB to
NO:
YES: Replace the ADF controller PCB.
COPYRIGHT© 2001 CANON INC.
connected properly?
Connect the cable properly.
erly?
Connect the connector properly.
the communication cable normal?
Replace the cable.
mally?
Connect it properly.
mally?
Connect it normally.
the communication cable normal?
Correct the cable.
2000 2000 2000 2000
CHAPTER 6 TROUBLESHOOTING
CANON iR8500/7200 REV.1 AUG. 2001
6-121