E422 - Canon iR105 Service Manual

Pickup roller height sensor 1 (PI8)
3) Set the meter range to 10 VDC. Does the voltage between the con-
NO:
Pickup roller height sensor 2 (PI9)
4) Set the meter range to 10 VDC. Does the voltage between the con-
NO:
Pickup roller home position sensor (PI7)
5) Set the meter range to 10 VDC. Is there voltage of the connectors
NO:
ADF controller PCB
6) Try replacing the ADF controller PCB. Is the problem corrected?
YES: Replace the ADF controller PCB.

4.1.48 E422

Communication cable
1) Is the connection of the communication cable between the ADF con-
NO:
Connector
2) Is there connection of the connector J1 on the ADF controller PCB
NO:
Cable, ADF controller PCB
3) Is the cable from the connector J1 of the ADF controller PCB to the
NO:
YES: Replace the ADF controller PCB.
COPYRIGHT© 2001 CANON INC.
nectors J14-A8 (+) and J14-A7 (-) on the ADF controller PCB alter-
nate between 0 and 5 V when the pickup roller unit (rear) is moved
up and down by hand?
Replace the pickup roller height sensor 1 (PI8).
nectors J14-A11 (+) and J14-A10 (-) on the ADF controller PCB al-
ternate between 0 and 5 V when the pickup roller unit (front) is
moved up and down by hand?
Replace the pickup roller height sensor 2 (PI9).
J14-A5 (+) and J14-A4 (-) on the ADF controller PCB about 5 V
when the pickup roller is moved back to home position by hand?
Replace the pickup roller home position sensor (PI7).
troller PCB and the machine normal?
Correct it.
normal?
Correct it.
communication cable normal?
Correct the cable.
2000 2000 2000 2000
CHAPTER 6 TROUBLESHOOTING
CANON iR105 REV.0 JULY 2001
6-113