General Cautions; Drum; Pcu Unit - Ricoh B132 Service Manual

3. REPLACEMENT AND ADJUSTMENT

3.1 GENERAL CAUTIONS

Never switch off either power switch while any of the electrical components are
operating. 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) drums are more sensitive to light and ammonia
gas than a selenium drum. Follow the cautions below when handling an OPC
drum.
1. When a PCU unit is removed from the machine, always place it on the PCU
stand provided with the machine.
2. Never expose a drum to direct sunlight.
3. Never expose a drum to direct light of more than 1,000 Lux for more than a
minute.
4. Never touch a drum surface with bare hands. If 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.
5. Never use alcohol to clean the drum (alcohol dissolves the drum surface).
6. Store drums in a cool, dry place away from heat.
7. Take care not to scratch the drum as the drum layer is thin and is easily
damaged.
8. Never expose a drum to corrosive gases such as ammonia gas.
9. Dispose of used drums in accordance with local regulations.

3.1.2 PCU UNIT

1. The PCU stand is stored in a rack attached to the bottom of the machine with
strong magnets.
2. Before pulling a PCU unit out of the machine, spread some clean paper to
catch spilt toner, remove the PCU stand from the bottom of the machine, clean
it with a clean cloth, and then set the PCU stand on the paper to hold the PCU
as soon as it is removed from the machine.
3. To prevent drum scratches, always set the PCU on the stand and leave it there
as long as it is out of the machine.
4. Remove only one PCU at a time for servicing. Only one PCU stand is provided
with the machine.
SM
GENERAL CAUTIONS
3-1 B132/B200