The DC controller determines a developing disengagement motor abnormality and notifies the formatter
when it does not detect a specified signal from the developing disengagement sensor during the
developing roller engagement and disengagement operation.
Figure 1-25 Developing unit engagement and disengagement control
M6
DC controller
Developing disengagement motor
Developing unit
Developing disengagement cam
Photosensitive drum
PS11:
Developing
disengagement
sensor
Developing unit is engaged
Developing unit is disengaged
ENWW
Image-formation system
37