Canon fax basic 2000 서비스 매뉴얼

RECORDING SECTION

4–34

(4) Condensing lens

This lens focuses the LASER beam on the photosensitive drum. Note,

however, that the scanning speed at points A and B is different by simply

focusing the LASER beam as can be seen in Fig. 4-39. Accordingly, a lens

that has the characteristic of ensuring that the scanning speed is uniform at

any point on the photosensitive drum is used as the condensing lens.

Fig. 4-39 Condensing Lens

4.6

Printing Process

The printing process comprises the six steps shown below.

Fig. 4-40 Printing Process

lens

Scanning mirror

LASER beam

Point B

Fixed scanning speed

Point A

Scanning mirror

LASER beam

Focusing lens

Point B

Fast scanning speed

Point A

Slow scanning speed

2: Exposure step

3: Developing step

1: Primary charging step

6: Drum cleaning step

5: Fixing step

4: Transfer step

: Photosensitive drum rotating direction

: Flow of recording paper