Canon iR6570 series Service Manual page 484

Chapter 13
When shorting CP33 and GND, take full care to avoid contact between the clip/probe and the pattern of the PCB and other elements.
4) Remove the left cover (upper), delivery cover, and left cover (middle).
5) Remove the 5 screws [1], and detach the PCB cover [2].
6) Disconnect the connector [1] connected to the DC controller PCB of the potential control PCB.
7) Close the front door, and turn on the main power switch.
8) 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. If not, suspect a fault in the DC
controller PCB.
9) Turn off the main power switch.
10) Remove the jumper wire found on the DC control PCB.
11) Connect the connector of the potential control PCB.
12) Mount the PCB cover, left cover (middle), delivery cover, and left cover (upper); then, close the front cover.
13) Mount the upper rear cover.
14) Turn on the main power switch.
(2) Method 2
1) Disable the potential control mechanism so that the machine is in non-auto control mode.
2) Turn off the main power switch.
3) Remove the potential sensor from the machine.
4) Connect the connector of the potential sensor to the connector of the machine.
5) Fit the potential sensor checking electrode (FY9-3012) [2] to the potential sensor [1].
13-12
[1]
[1]
[1] [2]
F-13-13
[1]
F-13-14
[1]