HP CP4525DN Laser CC494A#ABA manual Image-formation process, Functional block Steps Description

Image-formation process

The image-formation system consists of ten steps divided into six functional blocks.

Figure 1-12Image-formation process

: Media path
: Direction of drum rotation	Delivery
: Block
: Step		8. Fusing
	Fuser
ITB cleaning	Transfer
9. ITB cleaning		7. Separation
		6. Secondary transfer
	5. Primary transfer
	10. Drum cleaning	Drum cleaning
4. Developing
Developing	1. Pre-exposure

2.Primary charging

3.Laser beam exposure

Latent image formation

Pickup

Registration

Functional block	Steps		Description
Latent image formation	1.	Pre-exposure	An invisible latent image forms on the
	2.	Primary charging	surface of the photosensitive drums.
	3.	Laser-beam exposure
Development	4.	Development	Toner adheres to the electrostatic latent
			image on the photosensitive drums.
Transfer	5.	Primary transfer	The toner image transfers to the ITB and
	6.	Secondary transfer	later to the paper.
	7.	Separation
Fusing	8.	Fusing	The toner fuses to the paper to make a
			permanent image.
ITB cleaning	9.	ITB cleaning	Residual toner is removed from the ITB.
Drum cleaning	10. Drum cleaning		Residual toner is removed from the
			photosensitive drums.

ENWW Image-formation system 23