Brother HL-1260 service manual Electrostatic latent image formation stage

3.Transfer stage Step 4 Transfer (+) Step 5 Separation

4.Fixing stage Step 6 Fixing

5.Drum cleaning stage Step 7 Drum cleaning

	Electrostatic latent image
	formation stage
	2. Scanning exposure
	1. Primary charge
	3. Develop
	ment
Drum cleaning stage	7. Drum cleaning

Paper path

Direction of drum rotation

Developing stage

Fixing stage
5. Separa-	4. Transfer	Registration	Multi-purpose tray feed
tion

Print delivery 6. Fixing

Transfer stage

Cassette feed

Figure 2.7

3.2.1Electrostatic latent image formation stage

This stage has two steps, which together produce a pattern of electrical charges on the photosensitive drum.

At the end of the stage, negative charges remain in the unexposed ”dark” area. Charges are absent from the ”light” areas, where the laser beam struck (exposed) the drum surface.

Since this image of negative charges on the drum is invisible to the eye, it is called an ”electrostatic latent image”.

Surface potential (V)

0 -100

-500

			Time (t)
	Exposed
	area
		Unexposed
		area
Primary	Scanning	Transfer	Primary
charge	exposure	(step 4)	charge
(step 1)	(step 2)		(step 1)

Figure 2.8

II - 6