Drum Cleaning / Drum Cleaning Pre-Exposure Control - Canon imageRUNNER ADVANCE C3325 Series Service Manual

2
Technical Explanation > Image Formation System > Controls > Drum Unit / Developing Unit
● Drum Cleaning / Drum Cleaning Pre-exposure Control
[1]
[4]
Parts name
[1] Photosensitive Drum After a static latent image has been formed on the Photosensitive
Drum, a toner image is formed with the toner from the Developing
Cylinder.
[2] Cleaning Screw Residual toner that has been removed by the Cleaning Blade is
fed.
[3] Cleaning Blade Residual toner on the Photosensitive Drum is removed.
[4] Primary Charging Roller The surface of the Photosensitive Drum is charged to make a
uniform potential.
[5] Drum Cleaning Pre-exposure Residual charge remaining on the Photosensitive Drum surface is
LED removed.
[6] Residual Charge Residual charge remaining on the Photosensitive Drum surface
Drum cleaning
Purpose: To clean residual toner on the Photosensitive Drum
The Cleaning Blade, which is in contact with the Drum, cleans residual toner on the
Photosensitive Drum.
Next, residual toner is fed to the Waste Toner Container by the rotation of the Cleaning Screw.
Drum Cleaning Pre-exposure Control
Purpose: To remove residual charge from the Photosensitive Drum surface by emitting light
from the Pre-exposure LED
Ghost imaging, etc. is reduced by removing residual charge.
2 Technical Explanation > Image Formation System > Controls > Drum Unit / Developing Unit
[6]
[5]
[2]
[3]
F-2-48
Role
T-2-19
Related Service Mode:
COPIER > FUNCTION > MIXC-P > PRE-EXP : Lighting-up of Pre-exposure LED
COPIER > OPTION > FNC-SW > PREXP-SW : Set Clean Pre-exposure LED light condtn
COPIER > ADJUST > EXP-LED > PR-EXP-Y : Adj Cln Pre-expo LED(Y) intnsty: 1/1SPD
COPIER > ADJUST > EXP-LED > PR-EXP-M : Adj Cln Pre-expo LED(M) intnsty: 1/1SPD
COPIER > ADJUST > EXP-LED > PR-EXP-C : Adj Cln Pre-expo LED(C) intnsty: 1/1SPD
COPIER > ADJUST > EXP-LED > PR-EXP-K : Adj Cln Pre-expo LED(Bk) intnsty: 1/1SPD
COPIER > ADJUST > EXP-LED > PR-EXPY2 : Adj Cln Pre-expo LED(Y) intnsty: 1/2SPD
COPIER > ADJUST > EXP-LED > PR-EXPM2 : Adj Cln Pre-expo LED(M) intnsty: 1/2SPD
COPIER > ADJUST > EXP-LED > PR-EXPC2 : Adj Cln Pre-expo LED(C) intnsty: 1/2SPD
COPIER > ADJUST > EXP-LED > PR-EXPK2 : Adj Cln Pre-expo LED(Bk) intnsty: 1/2SPD
Related Alarm Code:
29-0101 : Drum (Y) pre-exposure alarm
29-0201 : Drum (M) pre-exposure alarm
29-0301 : Drum (C) pre-exposure alarm
29-0401 : Drum (K) pre-exposure alarm
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