E420; Outline Of Electrical Components; Sensors - Canon DADF-Q1 Service Manual

Chapter 4
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 connectors J14-A1 (+) and J14-A10 (-) on the ADF controller PCB alternate 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.

4.4.1.5 E420

Communication cable
1) Is the cable between the copier and the DADF properly connected?
NO: Connect the cable properly.
Connector
2) Is the connector (J1) on the ADF controller PCB properly connected?
NO: Connect the connector properly.
Cable, ADF controller PCB
3) Is the cable from the connector (J1) on the ADF controller PCB to the communication cable connected properly?
NO: Connect the cable properly.
YES: Replace the ADF controller PCB.

4.5 Outline of Electrical Components

4.5.1 Sensors

4-32
PI 2
PI 1
PI 3
PI 8
S6
PI 7
PI 9
S5
S6
PI 10
PI 4
S2
S4
S3
PI 5
S1
F-4-153
PI 13
PI 11 PI 12
S9
S7
PI 6
0011-3668
0011-7880