Canon NP6251 Service Manual page 576

Caution:
Set the clip fully away from the sensor cover and the sensor window so that it will
never come into contact with them.
5) Connect the cable of the potential sensor checking electrode to the Support metal
plate (GND) of the potential measurement PCB.
6) Insert the door switch actuator into the door assembly.
7) Turn on the power switch.
Caution:
Do not touch the potential sensor once you have turned on the power switch.
8) Start service mode (
initial rotation (hexadecimal analog value) is between '0003' and '0001B'.
Reference:
1. If the indication is as specified under method 1 and not as specified under
method 2.
Suspect dirt on the sensor or a fault in the potential measurement unit.
2. If the indication is as specified under both method 1 and method 2,
You may assume that the operation and signal path from the potential sensor
unit and the microprocessor on the DC controller PCB are normal.
9) Turn off the power switch.
10) Remove the potential sensor checking electrode.
11) Install the blanking exposure lamp assembly.
12) Turn on the power switch.
COPYRIGHT © 1997 CANON INC.
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Figure 11-249
), and check to make sure that address P023 during
2
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
11-45