Transfer Roller Unit; Scanner Unit; Laser Unit; Fusing Unit - Ricoh A193 Service Manual

SERVICE REMARKS

1.3 TRANSFER ROLLER UNIT

1. Never touch the transfer belt surface with bare hands.
2. Take care not to scratch the transfer roller as the surface is easily
damaged.

1.4 SCANNER UNIT

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 with water or a blower brush to clean the mirrors and
lens.
4. Do not bend or crease the exposure lamp flat cable.
5. Do not disassemble the lens unit. Doing so will throw the lens and the
copy image out of focus.
6. Do not turn any of the CCD positioning screws. Doing so will throw the
CCD out of position.

1.5 LASER UNIT

1. Do not loosen the screws that secure the LD drive board to the laser
diode casing. Doing so would throw the LD unit out of adjustment.
2. Do not adjust the variable resistors on the LD unit, as they are adjusted in
the factory.
3. The polygon mirror and F-theta mirror are very sensitive to dust. Never
open the optical housing unit.
4. Do not touch the glass surface of the polygon mirror motor unit with bare
hands.

1.6 FUSING UNIT

1. After installing the fusing thermistor, make sure that it is in contact with
the hot roller and that it rotates freely.
2. Be careful not to damage the edges of the hot roller strippers or their
tension springs.
3. Do not touch the fusing lamp and rollers with bare hands.
4. Make sure that the fusing lamp is positioned correctly and that it does not
touch the inner surface of the hot roller.
(A193) 4-2 SM