Canon iR C6800 Series Service Manual page 301

The relationship between the drive signal generated by the DC controller and the cleaning operation is as follows:
when POST_CLN_MTR0 is '0', the wire cleaner moves to the rear.
when POST_CLN_MTR0 is '1', the wire cleaner moves to the front.
DC-CON
[1]
[2]
[3]
F-7-30
1 Pre transfer charging assembly
2 Charging wire
3 Cleaner screw
4 Wire cleaner
5 Pre transfer charging wire cleaner motor
6 rear
7 front
DC CON: DC controller
The cleaning operation takes place in response to the following:
1. the temperature of the fixing roller is 100 deg C or less at power on.
2. wire cleaning is executed in user mode.
3. as many as 2000 images have been made (copy count; if mono color, 2000 pages, if full color, 500 pages).*1
*1: the intervals at which cleaning takes place may be changed using the following service mode items:
in a normal environment, COPIER>OPTION>BODY>W CLN P.
in a high temperature/high humidity environment, COPIER>OPTION>BODY>W CLN PH.
J1108-A11 POST_CLN_MTR0
POST_CLN_MTR1
J1108-A12
[4]
[5]
Chapter 7
7-35