Itb Cleaning Block; Photosensitive Drum Cleaning Block - Canon LBP7200Cdn Service Manual

Chapter 2

2.4.1.7 ITB cleaning block

The residual (waste) toner is cleared from the ITB surface.
Step 8: ITB cleaning
The ITB cleaning roller and the cleaning brush are applied with DC positive bias to charge the residual toner positive.
As the primary transfer pad is also applied with DC positive bias, the positively charged residual toner is reverse transferred to the photosensitive drum from the
ITB surface.
Positive potential waste toner
Negative potential waste toner
Partition sheet
ITB cleaning brush
DC bias

2.4.1.8 Photosensitive drum cleaning block

The waste toner is cleared from the photosensitive drum surface.
Step 9: Drum cleaning
The cleaning blade scrapes the waste toner off the surface of the photosensitive drum. The waste toner is deposited in the waste toner container.
2-6
Pressure roller
Sweeper strip
Toner
Media
F-2-11
Cartridge
Photosensitive drum
ITB cleaning roller
ITB
F-2-12
Fixing film
Fixing heater
DC bias
0021-1312
0021-1313