Ricoh G133 - Laser Exposure

Laser Exposure
G133 6-16 SM
6.3 LASER EXPOSURE
6.3.1 OVERVIEW
1. Synchronizing detector board: Y/C-E
2. LD unit-C
3. LD unit-Y
4. LD unit-Bk
5. LD unit-M
6. Synchronizing detector board: Bk/M-S
7. L1 lens-Bk/M
8. L2 lens-Bk
9. L2 lens-M
10. Synchronizing detector board: Bk/M-E
11. Polygon mirror motor
12. Synchronizing detector board: Y/C-S
13. L2 lens-C
14. L2 lens-Y
15. L1 lens-Y/C
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). In this model, two laser beams are used
for each color except for OHP/Thick paper type in 600 x 600 dpi mode.
There are two hexagonal mirrors. Each mirror reflects beams from two LD units.
Laser exposure for black and magenta starts from the rear side of the drum. But for yellow
and cyan it starts from the front side of the drum. This is because the units for black and
magenta are on the other side of the polygon mirror from the units for yellow and cyan.