COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
CHAPTER 6 TROUBLESHOOTING
6-120
Pickup roller height sensor 1 (PI8)
3) Set the meter range to 10 VDC. Move the pickup roller unit (rear)
up and down by hand. Does the voltage between connectors J14-A8
(+) and J14-A7 (–) on the ADF controller PCB change between 0 V
and 5 V?
NO: Replace the pickup roller height sensor 1 (PI8).
Pickup roller height sensor 2 (PI9)
4) Set the meter range to 10 VDC. Move the pickup roller unit (font)
up and down by hand. Does the voltage between J14-A11 (+) and
J14-A10 on the ADF controller PCB alternate between 0 and 5 V?
NO: Replace the pickup roller height sensor 2 (PI9).
Pickup roller home position sensor (PI7)
5) Set the meter range to 10 VDC.
Move the pickup roller unit (front) up and down by hand. Is the
voltage between J14-A5 (+) and J14-A4 (–) on the ADF controller
PCB about 5 V?
NO: Replace the pickup roller home position sensor (PI7).
ADF controller PCB
6) Replace the ADF controller PCB. Is the problem corrected?
YES: Replace the ADF controller PCB.
4.1.51 E412 (Indicated if iR7200)
Foreign object
1) Is there a foreign object that prevents the rotation of the coolong
fan?
YES: Remove the foreign object.
Connector
2) Is the connector (J11) on the ADF controller PCB connected
firmly?
NO: Connect it securely.
Cooling fan (FM1), ADF controller PCB
3) Try replacing the cooling fan (FM1). Is the problem corrected?
YES: End.
NO: Replace the ADF controller PCB.
4.1.52 E420 (Indicated if iR7200)
ADF controller PCB
1) Replace the ADF controller PCB.
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