Canon imagePRESS C1 P, Руководство по обслуживанию, Страница: 354 / 1265

Chapter 7
7-5
- Primary Transfer Bias
Charging method: Roller charging
Charging object: Primary transfer roller
DC bias value: -2.5 to 5k V (60u A)
- Secondary Transfer Static Charge Eliminator Bias
Charging method: Static charge eliminator charging
Charging object: Secondary transfer static charge eliminator
DC bias value: -4.0k V
- Secondary Transfer Bias
Charging method: Roller charging
Charging object: Secondary transfer roller
DC bias value: -7.0k V (-375u A)
- ITB Cleaning Roller 1
Charging method: Roller charging
Charging object: Bias roller / brush roller
DC bias value: -3k V
- ITB Cleaning Roller 2
Charging method: Roller charging
Charging object: Bias roller / brush roller
DC bias value: +3k V
- Tension Roller Bias
Charging method: Roller charging
Charging object: Tension roller
DC bias value: -2k V
- Secondary Transfer Cleaning Roller
Charging method: Roller charging
Charging object: Bias roller / brush roller
DC bias value: 80u A
F-7-4
[1] Pre-transfer Charging Wire
[2] Developing Cylinder
[3] Primary Charging Wire
[4] Grid Plate
[5] Primary Transfer Roller
[6] Tension Roller
[7] Secondary Transfer Inside Roller
[8] Brush Roller
[9] Bias Roller
[10] Secondary Transfer Static Charge Eliminator
7.2 Image Formation Process
7.2.1 Image Formation Process
0012-4907
imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
Electrostatic Latent Image Formation Block
This block consists of 3 steps, and forming the electrostatic latent image onto the photosensitive drum.
- Step 1: Pre-conditioning Exposure [1]
By exposing the light from the pre-conditioning LED to the surface of the photosensitive drum as a prearrangement of the primary charging, delete the residual
charge on the surface of the photosensitive drum and prevent uneven density.
- Step 2: Primary Charging [2]
As a prearrangement of the laser exposure, charging the surface of the photosensitive drum to the negative potential evenly.
This machine adopts the charging method with which the photosensitive drum is charged indirectly with the charging wire.
- Step 3: Laser Exposure [3]
area is neutralized with exposing the laser beam. The negative potential on the surface of the photosensitive drum is eliminated, and the eliminated area
[3] [4]
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