Drum Cleaning - Canon imageRUNNER ADVANCE C3500 III Series Service Manual

■ Drum Cleaning/Drum Cleaning Pre-exposure Control
No. Parts name
[1] Photosensitive Drum
[2] Cleaning Screw
[3] Cleaning blade
[4] Primary Charging Roller
[5] Drum Cleaning Pre-Exposure
LED
[6] Residual charge

Drum cleaning

Purpose:
Residual toner on the Photosensitive Drum is removed.
Control description:
1. When the Photosensitive Drum rotates, the Cleaning Blade engaged with the drum scrapes off residual toner on the
drum.
2. The Cleaning Screw is rotated to feed the toner that has been scraped off to the Waste Toner Container.
Drum cleaning pre-exposure control
Purpose:
The residual charge on the surface of the Photosensitive Drum (Bk/M/C) is removed to reduce ghost images, etc.
Control description:
The Pre-exposure LED is activated and light is emitted to the Photosensitive Drum (Bk/M/C).
Related service mode
• Activation of the Pre-exposure LED:
COPIER > FUNCTION > MISC-P > PRE-EXP
• Setting of the activation conditions of the Cleaning Pre-exposure LED:
COPIER > OPTION > FNC-SW > PREXP-SW
• Adjustment of the Cleaning Pre-exposure LED (M) light intensity (1/1 speed):
COPIER > ADJUST > EXP-LED > PR-EXP-M
• Adjustment of the Cleaning Pre-exposure LED (C) light intensity (1/1 speed):
COPIER > ADJUST > EXP-LED > PR-EXP-C
• Adjustment of the Cleaning Pre-exposure LED (Bk) light intensity (1/1 speed):
COPIER > ADJUST > EXP-LED > PR-EXP-K
• Adjustment of the Cleaning Pre-exposure LED (M) light intensity (1/2 speed):
COPIER > ADJUST > EXP-LED > PR-EXPM2
• Adjustment of the Cleaning Pre-exposure LED (C) light intensity (1/2 speed):
COPIER > ADJUST > EXP-LED > PR-EXPC2
• Adjustment of the Cleaning Pre-exposure LED (Bk) light intensity (1/2 speed):
COPIER > ADJUST > EXP-LED > PR-EXPK2
Related alarm codes
• 29-0201: Drum (M) pre-exposure alarm
[1]
[4]
After a static latent image has been formed on the Photosensitive Drum, a toner image
is formed with the toner from the Developing Cylinder.
Residual toner that has been removed by the Cleaning Blade is fed.
Residual toner on the Photosensitive Drum is removed.
The surface of the Photosensitive Drum is charged to make a uniform potential.
Residual charge remaining on surface of the Photosensitive Drum (Bk/M/C) is removed.
Residual charge remaining on the Photosensitive Drum surface
59
[6]
[5]
[2]
[3]
Role
2. Technology