Canon imagePRESS C1 Service Manual - page 412
Chapter 7
7-63
The secondary transfer static eliminator bias reduces the charge on the back of the print paper to weaken electrostatic absorption of the paper, enabling easy
separation.
- Splash toner collecting bias (applied bias: -DC)
In the splash toner collecting bias, the high-voltage is applied on the toner-blocking terminal plate beneath the developing cylinder to attract the suspended
toner and prevent toner splash in the machine.
7.9.3 Overview of the Primary Transfer Assembly
0013-6761
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
The primary transfer assembly has three motors to activate/detach the main roller.
The drum/ITB motor (M2) rotates the ITB drive roller and the ITB cleaning screw. The brush roller attachment/detachment motor (M18) performs attachment/
detachment between the brush roller for ITB cleaning and the ITB. The brush roller drive motor (M26) activates the brush roller to collect the residual toner on the
ITB.
The DC controller performs drive/detachment by controlling three motors via the side driver PCB.
The DC controller performs ITB cleaner attachment/detachment detection to detect the position of the brush roller for ITB cleaning via the side driver PCB.
F-7-78
[1] ITB drive roller
[2] ITB cleaning screw
[3] ITB cleaner
[4] Brush roller
[5] Bias roller
[6] Cleaner blade
[7] Side driver PCB
PS24: Brush roller home position sensor
M2: Drum/ITB motor
M18: Brush roller attachment/detachment motor
M26: Brush roller drive motor
DC-CON: DC controller
7.9.4 ITB Cleaner Attachment/Detachment Control
0013-6773
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
To remove the residual toner on the ITB, this machine performs attachment/detachment between the brush roller for ITB cleaning and the ITB.
The DC controller performs attachment/detachment by activating the brush roller attachment/detachment motor (M18) via the side driver PCB.
The DC controller activates the brush roller by driving the brush roller drive motor (M26) via the side driver PCB.
The following is the timing of attachment/detachment.
1. At initial rotation or just after the start of secondary transfer, the DC controller outputs the brush roller attachment/detachment drive signal via the side driver
PCB.
2. The attachment/detachment arm is activated by rotating the attachment/detachment cam clockwise (See the following chart A).
(thereby locking brush roller in place against ITB
3. After applying pressure on the ITB, the DC controller outputs the brush roller drive motor drive signal via the side driver PCB.
[7]
PS24
M18
M26
DC-CON
M2
[2]
[5]
J3405
J1193
J1173
[1]
[4]
[3]
[6]
[6]