Drum Unit - Ricoh FT5535 Service Manual

1.2 DRUM UNIT

1. Make sure that the drum unit is set in position and the drum stay is secured
with a screw when 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 may change in the worst case).
2. Insert a clean sheet of paper between the drum and the drum charge roller
and also cover the OPC drum with paper when you leave the drum unit out of
the copier more than 30 minutes. Doing so prevents the drum charge roller
from sticking to the drum. If the drum charge roller sticks to the drum, the
chemical component of the drum charge roller affects the surface of OPC
drum.
1.3 DRUM CHARGE ROLLER
1. Do not touch the drum charge roller with bare hands. Oil stains may cause
black bands on copies due to excessive drum charge.
2. Do not adhere toner or setting powder dust to the drum charge roller. Toner
stains or setting power may cause white spots or white bands on copies due
to insufficient drum charge.
3. Prevent the drum charge roller from being exposed to dusty air. Dust on the
drum charge roller may cause white spots on copies due to insufficient drum
charge.
4. Never use alcohol or water to clean the drum charge roller. Alcohol or water
corrode the surface of the drum charge roller. Wipe with a dry cloth or a
Dupont Sontara DY-12 cloth - P/N A1539004.
5. Reduce the drum charge roller cleaning intervals with SP2-901 as follows for
users who mainly make high volume copy runs continuously.
SP2-901 setting
0 ..................... Every 1000 copies for 10 seconds [default]
1 ..................... Every 500 copies for 10 seconds
2 ..................... Every 200 copies for 10 seconds
3 ..................... Every 100 copies for 10 seconds
6. Plug in the copier power cord even when the copier main switch is turned off.
While the main switch is turned off, the drum heater must be turned on to
keep the temperature around the drum charge roller over 15°C. This prevents
the drum charge efficiency from being low for the first copy after the power is
switched on.
FT5535/4527/4522
Cleaning interval
4-2 FSM