Laser Diode Unit; Laser Beam Pitch Adjustment - Ricoh M001 Service Manual

Laser Unit

3.4.5 LASER DIODE UNIT

1. Laser Unit ( Laser Unit)
2. Spring [A]
3. LD unit holders [B] (x 2)
4. Loosen the screw [C]
5. Nut [D]
6. LD Unit [E]
Do not remove the screws that secure the LD board.
Do not touch any variable resistors on the LD board.
When Reinstalling the Laser Diode Unit:
Tighten the screw [C] until the unpainted portion of the screw
After installing the LD unit, check the test pattern for the final adjustment (see the
following procedure).

3.4.6 LASER BEAM PITCH ADJUSTMENT

1. Print out the following test patterns.
Select the test pattern with SP 5902-3.
Use SP 5902-1 to print one test pattern.
2. Check this test pattern.
3. Adjust the LD unit holder position: Tighten or loosen the screw [C] (see the previous
page) until the printout appears as the sample test pattern below.
M001 3-12
is not visible.
SM