Checking The Photointerrupters - Canon iR8500 Service Manual

CHAPTER 6 TROUBLESHOOTING

2.10 Checking the Photointerrupters

The machine's photointerrupters may be checked by a conventional meter or its service
mode:
a. Using a Meter
1) Set the meter range to 30 VDC.
2) Connect the − probe of the meter to GND of the DC controller PCB.
3) Connect the + probe of the meter to the terminals (DC controller PCB) indicated in the
following table.
4) Make checks as instructed.
b. Using Service Mode
1) Start service mode (COPIER>I/O), and check the appropriate address.
Turning on/off a sensor can start the machine's motor or the like. Take full
care.
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COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001