Canon iR8500 Service Manual page 520

Delivery motor (M5)
2) Disconnect the connector (J2) from the ADF controller PCB.
NO:
Delivery Motor Clock Sensor (PI11)
ADF controller PCB
3) Set the meter range to 10 VDC. Turn the delivery motor by hand.
NO:
YES: Replace the ADF controller PCB.
COPYRIGHT© 2001 CANON INC.
Set the meter range to × 1Ω Ω Ω Ω Ω , and connect the meter probes as indi-
cated. Is the resistance about 15Ω Ω Ω Ω Ω ?
Replace the delivery motor (M5). After replacement, be sure to per-
form "Adjusting the Sensor and the Delivery Motor."
Does the voltage between connectors J3-2 (+) and J3-1 (–) on the
ADF controller PCB change between 0 V and 5 V?
Replace the delivery motor clock sensor (PI11).
2000 2000 2000 2000
CHAPTER 6 TROUBLESHOOTING
15
ADF
14
controller
13
12
PCB
11
10
9
8
7
6
5
4
3
2
1
F06-401-09
CANON iR8500/7200 REV.1 AUG. 2001
J2
6-117