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Canon MF8580Cdw Service Manual page 49

Mf8500/mf8200 series
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Manual - 750 pages
User manual - 750 pages
Getting started - 292 pages

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2
Technical Overview > Image Formation System > Image Forming Process > Transfer block
■ Transfer block
The toner image on the photosensitive drum is transferred to paper through 3 steps in this
block.
● Step 4: Primary transfer
Transfer the toner image on the photosensitive drum to the ITB.
The DC positive bias is applied to the primary transfer pad to charge the ITB positively. By
this, the negatively charged toner on the photosensitive drum is transferred to the ITB.
Photosensitive
drum
Primary transfer pad
2
Technical Overview > Image Formation System > Image Forming Process > Transfer block
ITB
DC bias
F-2-22
● Step 5: Secondary transfer
Transfer the toner image on the ITB to paper.
The DC positive bias is applied to the secondary transfer external roller to charge the paper
positively. By this, the negatively charged toner image on the ITB is transferred to the paper.
Media
Static charge eliminator
Secondary
transfer external roller
DC bias
● Step 6: Separation
Separate the paper from the ITB using paper elasticity and curvature of the ITB drive motor.
To stabilize the paper delivery and image quality, use the static eliminator to decay the
potential on the back of the paper after image transfer.
Media
Secondary
transfer external roller
.
2-20
ITB
ITB drive roller
F-2-23
ITB
ITB drive roller
F-2-24
2-20

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