Ricoh SH-P1 Series, Training

Page: 61 / 116

SH-P1 Training
61
Slide 61
Laser Unit Components
1. LD unit
2. Laser shutter
3. Cylindrical lens
4. Shield glass
5. Polygon mirror
6. L1 lens
7. Drum
8. L2 Lens
9. Synchronization detector
10. Toroidal lens
11. 1st mirror
12. 2nd mirror
13. Detector mirror
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Synchronization detector: The 1st mirror, 2nd mirror, and the detector mirror
reflect the beam from the LD unit to the synchronization detector.
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Two laser beams: The LD unit writes two lines at the same time.
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LD safety shutter: When the user opens the front cover, the shutter closes and
blocks the laser beam path.
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After you replace the LD unit, adjust its position (see Replacement and
Adjustment).
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There is a thermistor next to the laser unit (not shown) that checks the
temperature inside the machine. The machine automatically corrects the charge
roller and transfer voltages based on this temperature.