Ricoh FT4227 Manual page 404

12 February 1992
1. SERVICE REMARKS
1.1 HANDLING THE DRUM
The organic photoconductor drum is comparatively more sensitive to light
and ammonia gas than a selenium drum.
1. Never expose the drum to direct sunlight.
2. Never touch the drum surface with bare hands. When the drum surface is
touched with a finger or becomes dirty, wipe with a dry cloth or clean with
wet cotton. Wipe with a dry cloth after cleaning with wet cotton.
3. Never use alcohol to clean the drum; alcohol dissolves the drum surface.
4. Store the drum in a cool, dry place away from heat.
5. Take care not to scratch the drum as the drum layer is thin and is easily
damaged.
6. Never expose the drum to corrosive gases such as ammonia gas.
7. 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 the
drum to bright light or direct sunlight. This will protect the drum from light
fatigue.
8. Before inserting or pulling out the drum unit, the following should be
performed to avoid damaging the drum:
a) Remove the black and color development units
b) Remove the cleaning unit
c) Remove the charge corona unit
d) Lower the T&S corona unit
9. Drum initial setting (SP66) must be performed when a new drum is
installed.
4-1
SERVICE REMARKS