4.1.1 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. Before pulling out the PCU, place a sheet of paper under the PCU to catch any
spilt toner.
10. Dispose of used drums in accordance with local regulations.
11. When installing a new drum in the PCU, the following must be done in the
stated order.
1) Remove the protective sheet after securing the new drum in the drum unit.
2) Make sure that the charge roller voltage supply is at the standard value
(SP2-001-1).
3) Do the ID Sensor Initial Setting procedure (SP 3-001-2)
4) Do SP2-805 (process initialization).
12. When installing the PCU, make sure that the PCU is set in the machine
properly.
4.1.6 DEVELOPMENT
1. Be careful not to nick or scratch the development roller.
2. Place the development unit on a sheet of paper after removing it from the
copier.
3. Never disassemble the development roller assembly. The position of the doctor
plate is set with special tools and instruments at the factory to ensure the
proper gap between the doctor blade and the development roller.
4. Clean the drive gears after removing used developer.
5. Dispose of used developer in accordance with local regulations.
6. Never load different types of developer and toner into the development unit.
Doing so will cause poor copy quality and toner scattering.
7. Immediately after installing new developer, the TD sensor initial setting
procedure should be performed to avoid damage to the copier. Do not perform
the TD sensor initial setting with used developer. Do not make any copies
before doing the TD sensor initial setting.
8. When using a vacuum cleaner to clean the development unit casing, always
ground the casing with your fingers to avoid damaging the toner density sensor
with static electricity.
9. After replacing the TD sensor, do the TD sensor initial setting procedure (SP 2-
801).
