Static Latent Image Formation Block - Canon LBP6000 Series Service Manual

Table of Contents

4. Fixing block

Step 6: Fixing

5. Drum cleaning block

Step 7: Drum cleaning

Paper path

Rotational direction of the

drum

Delivery

2.4.1.3 Static Latent Image Formation Block

LBP3100 / LBP3010B

This block is comprised of two steps and forms static latent images on the photosensitive drum.

When the final step of this block completes, negative charge remains at dark areas on the drum surface where laser beam has not been exposed, and negative charge

is eliminated from bright areas on the drum surface with laser beam exposed. The images on the drum with negative charge are called static latent images because

human eyes cannot detect them.

Step 1: Primary charging

For preparation of latent image formation, the surface of photosensitive drum is charged with even negative potential. In this primary charging, the charge is applied

from the primary charging roller directly to the photosensitive drum.

DC bias is applied to the primary charging roller to maintain an even potential on the surface of the photosensitive drum.

Step 2: Laser beam exposure

In this step, static latent images are formed on the photosensitive drum with laser beam.

When laser beams are scanned on the photosensitive drum negatively charged, bright areas lose their charges, eliminating negative potential on the surface of the

photosensitive drum; on those portions, static latent images are formed.

Electrostatic latent image formation block

1. Primary charging

Drum cleaning

7. Drum cleaning

block

Fixing block

6. Fixing

Primary

charging

(step 1)

Primary charging roller