Canon MF735C Series Service Manual page 43

■ Developing Cylinder Engagement/Disengagement Control
Overview
The DC Controller engages/disengages the Developing Cylinder in the Toner Cartridge with/from the Photosensitive Drum.
Execution Condition/Timing
The Developing Cylinder is engaged or disengaged depending on the state of this machine.
State of this machine
Power Supply Off/Standby
B&W Print
Full Color Print
Description
In accordance with the specified print mode (full color or B&W), only the Developing Cylinder(s) necessary for the mode is engaged
with the Photosensitive Drum.
The Developing Cylinders are engaged only when needed, and this prevents deterioration of the Photosensitive Drum and
ensures the maximum life.
For engagement/disengagement of the Developing Cylinders, the DC Controller drives the Developing Disengagement Solenoid
(Bk) (SL2)/Developing Disengagement Solenoid (Color) (SL3) while the Developing Motor (M3) is driving to change the orientation
of the Engagement/Disengagement Cam.
The DC Controller detects the current state using the Developing Disengagement Switch (Bk) (SW3)/Developing Disengagement
Switch (Color) (SW2), and determines the state (engaged or disengaged) of the Developing Cylinders on the basis of the amount
of rotation of the Developing Motor after the Developing Disengagement Solenoid starts to be driven.
Error Code
• E015-0000: Error in Developing Disengagement Motor
Y/M/C
Disengagement
Disengagement
Engagement
34
2. Technical Explanation (Device)
Bk
Engagement