Laser Beam Pitch Change Mechanism - Ricoh B291 Service Manual

6.6.4 LASER BEAM PITCH CHANGE MECHANISM

The LD positioning motor [A] moves the LD unit housing [B] up and down and
changes the position of L2 (L1 does not move).
Both LD unit positions are at fixed distances from the LD unit home position sensor
[C].
Usually, the LD unit moves directly to the proper position. However, when the
number of times that the resolution has changed reaches the value of SP2-109-5
(LD Beam Pitch Adjustment), the LD unit moves to the home position, and this
re-calibrates the LD unit positioning mechanism.
SM
CÓPIA NÃO CONTROLADA
6-51
CÓPIA NÃO CONTROLADA
LASER EXPOSURE
[C]
[B]
[A]
B195D543.WMF
B291/B295/B296/B297