Replacement And Adjustment; General Cautions; Drum; Drum Unit - Ricoh MT-C1 Service Manual

15 February 2006

3. REPLACEMENT AND ADJUSTMENT

3.1 GENERAL CAUTIONS

Do not turn off either of the power switches while any of the electrical components
are active. Doing so might cause damage to units such as the transfer belt, drum,
and development unit when they are pulled out of or put back into the copier.

3.1.1 DRUM

An organic photoconductor (OPC) drum is more sensitive to light and ammonia gas
than a selenium drum. Follow the cautions below when handling an OPC drum.
1. Never expose the drum to direct sunlight.
2. Never expose the drum to direct light of more than 1,000 Lux for more than a
minute.
3. Never touch the drum surface with bare hands. When the drum surface is
touched with a finger or becomes dirty, wipe it with a dry cloth or clean it with
wet cotton. Wipe with a dry cloth after cleaning with wet cotton.
4. Never use alcohol to clean the drum; alcohol dissolves the drum surface.
5. Store the drum in a cool, dry place away from heat.
6. Take care not to scratch the drum as the drum layer is thin and is easily
damaged.
7. Never expose the drum to corrosive gases such as ammonia gas.
8. Always keep the drum in the protective sheet when keeping the drum unit, or
the drum itself, out of the copier. Doing so avoids exposing it to bright light or
direct sunlight, and will protect it from light fatigue.
9. Dispose of used drums in accordance with local regulations.
10. When installing a new drum, execute SP2962 (Adjustment of Drum Conditions).

3.1.2 DRUM UNIT

1. Before pulling out the drum unit, place a sheet of paper under the drum unit to
catch any spilt toner.
2. Make sure that the drum unit is set in position and the drum stay is secured
with a screw before the main switch is turned on. If the drum unit is loose, poor
contact of the drum connectors may cause electrical noise, resulting in
unexpected malfunctions (RAM data change is the worst case).
3. To prevent drum scratches, remove the development unit before removing the
drum unit.
3-1
GENERAL CAUTIONS