Canon iR6570 Series Portable Manual page 49

When fitting the checking electrode to the potential sensor, take full care so that the electrode will not come into
contact with the potential sensor cover.
6) Connect the clip [1] of the checking electrode to the machine frame (GND).
Be sure never to bring the clip [1] into contact with the sensor cover. Also, be sure to fit it sufficiently away from the
sensor window.
7) Fit the door switch actuator into the door switch assembly.
8) Turn on the main power switch.
When you have turned on the main power switch, be sure never to touch the potential sensor.
9) Make the following selections in service mode:
COPIER>DISPLAY>DPOT>DPOT-K. Then, check to see that the indication during initial rotation is between 0
and 30.
MEMO:
1. If the result of Method 1 is as indicated but that of Method 2 is not, suspect soiling of the sensor and a fault in the
potential measurement unit.
2. If the results of both Methods 1 and 2 are as indicated, assume that the signal path and operation from the potential
sensor unit to the microprocessor on the DC controller PCB are normal.
10) Turn off the main power switch.
[1]
F-2-16
Chapter 2
2-15