Canon iR C6800 Series Service Manual page 682

Chapter 9
When the temperature of the fixing roller reaches 200 deg C during warm up or when last rotation ends, the outside
heating roller shift motor goes on (in reverse direction of rotation) to move the outside heating roller away from the
fixing roller. When the paper jam also occurs, the outside heating roller shift motor goes on to move the outside
heating roller away from the fixing roller.
The timing at which the outside heating roller is moved is monitored using the outside heating roller HP sensor
(PS21) for the following:
When the main power switch is turned on
When the front cover, upper right cover, or lower right cover is opened/closed
When the power save mechanism (power save mode, low power mode, sleep mode) is disabled
Normal rotation
PS21
[1] Outside heating roller
[2] Fixing roller
9-18
M22
Touched
Reverse rotation
M22
PS21
[1]
[2]
Released (Home position)
F-9-16