Canon 1130 Service Manual page 612

Method 2
1) Turn off the power switch.
2) Remove the photosensitive drum unit.
3) Fit the potential sensor electrode (TKN-0197) to the potential sensor.
When fitting the potential sensor electrode to the potential sensor, make sure
that magenta of the electrode will not come into contact with the potential
sensor base.
4) Attach the clip of the jumper line to the potential sensor electrode.
Be sure NOT to let the clip come into contact with the sensor cover. Further, be
sure to allow enough distance from the sensor window.
5) Connect one end of the jumper wire to the copier's chassis metal plate (GND) of the copier.
6) Insert the cover
7) Turn on the power switch.
After turning on the power switch, do NOT touch the potential sensor assembly.
8) Check to make sure that DISPLAY>DPOT>DPOT is 100 ± 30 V in service mode.
If the reading is as indicated in method 1 but not as indicated in method 2,
suspect dirt on the sensor or a fault in the potential measurement unit.
REF.
If the reading is not as indicated in method 1 and method 2, you may assume
that the signal path from the potential sensor unit to the CPU on the CPU PCB is
normal.
9) Turn off the power switch.
10) Detach the potential sensor electrode.
11) Mount the photosensitive drum unit.
12) Turn on the power switch.
COPYRIGHT © 2002 CANON INC.
switch actuator into the
CANON CLC1100/1130/1150/1160/1180 REV.2 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
cover switch assembly.
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