Service manual

LASER EXPOSURE

G130/G131 6-20 SM

6.3 LASER EXPOSURE

6.3.1 OVERVIEW

1. Synchronizing detector board-Y, K-E

2. LD unit-Y

3. LD unit-K

4. LD Mirror-M

5. LD unit-M

6. LD unit-C

7. F-theta lens-M, C

8. Synchronizing detector board-M, C-S

9. Synchronizing detector board-M, C-E

10. OPC drum-M

11. WTL

12. OPC drum-C

13. OPC drum-Y

14. OPC drum-K

15. Synchronizing detector board-Y, K-S

16. F-theta lens-Y, K

17. Polygon mirror motor

18. LD Mirror-K

This machine uses four LD units and one polygon mirror motor to produce latent

images on four OPC drums (one drum for each color toner).

There are two hexagonal mirrors. Each mirror reflects beams from two LD units.

Laser exposure for magenta and cyan starts from the rear side of the drum.

However, for yellow and black it starts from the front side of the drum. This is

because the units for magenta and cyan are on the other side of the polygon mirror

from the units for yellow and black.

G130D514.WMF