Transfer/Separation; Developing Bias Control - Canon imageRUNNER ADVANCE C3500 III Series Service Manual

Developing bias control

Purpose
To apply voltage to the Developing Cylinder in order to generate a potential difference from the Photosensitive Drum
Control description
The developing bias (AC, DC negative), which has been generated on the Secondary Charging PCB (UN03), is applied to
the Developing Cylinder.
• Developing DC bias: The bias to generate potential difference with the Photosensitive Drum. The bias value is
determined based on the Environment Sensor (UN27).
• Developing AC bias: The bias to improve image quality.
No.
[1] Developing Cylinder

Transfer/Separation

■ Parts / Drive Configuration
No. Parts name
[1] Primary Transfer Roller
[2] ITB Cleaning Screw
[3] ITB (Intermediate Transfer Belt)
[4] Secondary Transfer Inner Roller
[5] Secondary Transfer Outer Roller
M02 Bk Drum_ITB Motor
UN049
UN03
Secondary Transfer High-voltage PCB
[1]
M02
[3]
[2]
Toner on the Photosensitive Drum is attracted to the ITB.
Residual toner inside the ITB Cleaning Unit is fed.
Toner on the Photosensitive Drum is transferred to a paper.
The ITB is driven.
As well as attracting toner on the ITB to the paper, paper is fed.
The Secondary Transfer Roller/ITB Cleaning Screw/Bk Drum Unit is driven.
DC Controller PCB
Parts name
[4]
Role
63
2. Technology
[5]
[1]