Ricoh G104, Service Manual

Page: 254 / 601

LASER EXPOSURE
G104 6-26 SM
6.4 LASER EXPOSURE
6.4.1 OVERVIEW
1. LDB unit-C
2. LDB unit-Y
3. LDB unit-K
4. LDB unit-M
5. Synchronizing detector board-M, K-E
6. LD Mirror-K
7. F-theta lens-M, K
8. Synchronizing detector board-M, K-S
9. Mirror
10. Synchronizing detector board-Y, C-S
11. Polygon mirror motor
12. Synchronizing detector board-Y, C-E
13. F-theta lens-Y, C
14. LD Mirror-Y
This machine uses four LDB 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 LDB units.
Laser exposure for yellow and cyan starts from the right side of the drum, but for
magenta and black it starts from the left side of the drum. This is because the units
for yellow and cyan are on the other side of the polygon mirror from the units for
magenta and black.
G105D133.WMF
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CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA