Laser Exposure; Overview - Ricoh J-P3 Service Manual

20 February 2004

6.3 LASER EXPOSURE

6.3.1 OVERVIEW

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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
Model J-P3 has four LD units, two hexagonal mirrors, and one polygon-mirror
motor. One hexagonal mirror is on top of the other; the two mirrors are on the same
pivot. The polygon-mirror motor drives this pivot, and this turns the two mirrors at
the same time. The upper mirror reflects the beams from LD unit-Y and LD unit-C;
the lower mirror reflects the beams from LD unit-K and LD unit-M.
The beams from LD unit-Y and LD unit-K are reflected to the left side (viewed from
the front of the machine); the beams from LD unit-M and LD unit-C are reflected to
the right side. Laser exposure for magenta and cyan starts from the rear side of the
drums; laser exposure for yellow and black starts from the front side of the drums.
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6-7
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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
LASER EXPOSURE
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G106D910.WMF