Specifications

2001 CANON INC. 2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001

CHAPTER 5 TROUBLESHOOTING

5-58

Pickup roller height sensor 1 (PI8)

3) Se the meter range to 10 VDC. Does the voltage between J14-A8 (+)

and J14-A7 (-) on the ADF controller PCB alternate between 0 and

5 V when the pickup roller unit (rear) is moved up/down by hand?

NO: Replace the pickup roller height sensor 1 (PI8).

Pickup roller height sensor 2 (PI9)

4) Set the meter range to 10 VDC. Does the voltage between connec-

tors J14-A1 (+) and J14-A10 (-) on the ADF controller PCB alter-

nate between 0 and 5 V when the pickup roller unit (front) is moved

up/down by hand?

NO: Replace the pickup roller height sensor 2 (PI9).

Pickup roller home position sensor (PI7)

5) Set the meter range to 10 VDC. Is the voltage between connectors

J14-A5 (+) and J14-A4 (-) on the ADF controller PCB about 5 V

when the pickup roller unit is returned to home position by hand?

NO: Replace the pickup roller home position sensor (PI7).

ADF controller PCB

6) Try replacing the ADF controller PCB. Is the problem corrected?

YES: Replace the ADF controller PCB.