Pre-Transfer Charging Bias Control - Canon imagePRESS C1 P Service Manual

[1] Primary charging assembly
[2] Charging wire
[3] Cleaner screw
[4] Wire cleaner
[5] Primary charging wire cleaning motor
DC-CON: DC controller
The cleaning operation is activated at the following timing.
- The temperature of the fixing roller is 100 deg C or lower when the power is turned on.
- Wire cleaning is performed in the user mode.
- Every 2000 copies (2000 copies in the mono color mode, 500 copies in the full color mode) (*1)
*1: Adjust the cleaning interval for the number of copies using the following service mode.
In the normal environment: COPIER>OPTION>BODY>
In the high temperature/humidity environment: COPIER>OPTION>BODY>

7.5.3 Pre-Transfer Charging Bias Control

imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
The pre-transfer charging bias is applied to the toner on the photosensitive drum when development is performed in order to align the electric potential for the toner
layer formed on the ITB.
The pre-transfer charging bias provides two types of biases; pre-transfer charging DC bias and pre-transfer charging AC bias.
These biases are created in the high voltage PCB 1 based on an instruction by the DC controller, and applied to the pre-transfer charging wire.
J1167-10
DC-CON
-11
[1]
[3]
[2]
J3416-6
Side driver PCB
-7
[6]
[4]
F-7-49
Chapter 7
[5]
0012-8168
7-41