Brother International HL-1260 Service Manual - Page 22

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 Paper path Direction of drum rotation 1. Primary charge Drum cleaning stage 7. Drum cleaning 3. Develop ment Developing stage Print delivery Fixing stage 6. Fixing 5. Separation 4. Transfer Transfer stage Registration Cassette feed Multi-purpose tray feed Figure 2.7 3.2.1 Electrostatic 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 Primary Scanning charge exposure (step 1) (step 2) Unexposed area Transfer Primary (step 4) charge (step 1) Figure 2.8 II - 6