Canon ImageRunner 600 Service Manual page 622

CHAPTER 13 TROUBLESHOOTING
9) Fit the door switch auto control into the door switch assembly.
10) Turn on the power switch.
Caution:
Do not touch the potential sensor after turning on the power switch.
11) Select COPIER>DISPLAY>DPOT>DPOT-K in service mode, and check that the reading dur-
ing initial rotation is between 0 and 30.
Reference:
1. If the result in method 1 is as indicated, and the result in method 2 is not as indicated,
suspect dirt on the sensor or a fault in the potential measurement unit.
2. If the results in method 1 and method 2 are as indicated,
assume that the signal path from the potential sensor unit to the microprocessor on the DC
controller PCB is normal and the operation in general is also normal.
12) Turn off the power switch.
13) Detach the potential sensor meter electrode.
14) Mount the potential sensor support plate.
15) Turn on the power switch.
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COPYRIGHT © 1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.