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