Service Remarks; General Caution; Pcu - Ricoh A193 Service Manual

1. SERVICE REMARKS

1.1 GENERAL CAUTION

Do not turn off the main switch while any of the electrical components are
active. Doing so might cause damage to units, such as the PCU, when they
are pulled out of or re-inserted into the copier.
1.2 PCU (Photo-Contuctor Unit)
The PCU consists of the OPC drum, development unit, charge roller unit, and
cleaning unit. Follow the cautions below when handling a PCU.
1. Never touch the drum surface with bare hands. When the drum surface is
touched or becomes dirty, wipe it with the special cleaning cloth, part
number, A1539004.
2. Never use alcohol to clean the drum; alcohol dissolves the drum surface.
3. Store the PCU in a cool, dry place away from heat.
4. Take care not to scratch the drum as the drum layer is thin and is easily
damaged.
5. Never expose the drum to corrosive gases such as ammonia gas.
6. Never shake the PCU. Doing so may cause toner and/or developer to
spill out.
7. Do not bend the PCU. Doing so may cause toner and/or developer to spill
out.
8. Dispose of used PCUs in accordance with local regulations.
9. Do not touch the charge roller with bare hands. Oil stains may cause
black bands on copies due to excessive drum charge.
10. Prevent the charge roller from being exposed to dusty air. Dust on the
charge roller may cause white spots on copies due to insufficient drum
charge.
11. Never use alcohol or water to clean the drum charge roller. Alcohol or
water corrode its surface. Wipe with a dry cloth.
SM 4-1
SERVICE REMARKS
(A193)