Transfer Belt Unit; Scanner Unit; Laser Unit - Ricoh B234 Service Manual

GENERAL CAUTIONS
3.1.3

TRANSFER BELT UNIT

1. Never touch the transfer belt surface with bare hands.
2. Take care not to scratch the transfer belt, because the surface is easily
damaged.
3. Before installing the new transfer belt, clean all the rollers and the inner part of
the transfer belt with a dry cloth to prevent the belt from slipping.
3.1.4

SCANNER UNIT

1. When installing the exposure glass, make sure that the white paint is at the rear
left corner.
2. Clean the exposure glass with alcohol or glass cleaner to reduce the amount of
static electricity on the glass surface.
3. Use a cotton pad or optical cloth to clean the mirrors and lens.
4. Do not bend or crease the exposure lamp flat cable.
5. Do not disassemble the lens unit. This will put the lens and the copy image out
of focus.
6. Do not turn any of the CCD positioning screws. This will put the CCD out of
position.
3.1.5

LASER UNIT

1. Do not loosen the screws that secure the LD drive board to the laser diode
casing. This will put the LD unit out of adjustment.
2. Do not adjust the variable resistors on the LD unit, because they are adjusted in
the factory.
3. The polygon mirror and F-theta lenses are very sensitive to dust. Do not open
the optical housing unit.
4. Do not touch the glass surface of the polygon mirror motor unit with bare
hands.
5. After replacing the LD unit, do the laser beam pitch adjustment. Otherwise, an
SC condition will be generated.
3-2