Polygon Mirror Motor Unit; Synchronization Detector; Ld Unit - Ricoh B156 Service Manual

6.8.2 POLYGON MIRROR MOTOR UNIT

Speed
The polygon mirror motor rotates at about 21,024 rpm.

6.8.3 SYNCHRONIZATION DETECTOR

The synchronization detector is on the rear side of the laser unit.
The synchronization detector simultaneously checks 2 laser beams.

6.8.4 LD UNIT

Two laser diodes in the LD unit emit 2 main-scan laser-beams. Having two lasers
speeds up image creation. It also allows the polygon motor to operate at a lower
speed, which cuts down noise emission and makes the motor last longer.
The LD unit does not need any adjustment when replaced.
B156/B220
CÓPIA NÃO CONTROLADA
6-44
CÓPIA NÃO CONTROLADA
LASER EXPOSURE
SM