Laser Exposure - Ricoh B121 Service Manual

6.6 LASER EXPOSURE

6.6.1 OVERVIEW
[J]
[I]
[H]
[G]
[F]
[A]: LD unit
[B]: Synchronization detector lens
[C]: Double toroidal lens
[D]: Shield glass
[E]: OPC drum
[F]: 1st mirror
• The LD drive board controls both the laser output and laser synchronization
mechanism.
• The machine cuts off the power supply to the LD drive board if the front or right
cover is opened.
SM
[K]
6-29
LASER EXPOSURE
[A]
[B]
[C]
[D]
B121D934.WMF
[G]: 2nd mirror
[H]: F-theta lens
[I]: Polygon mirror
[J]: Cylindrical lens
[K]: Synchronization detector mirror
B121 Series/B259 Series
[E]