Ricoh A151, Field Service Manual

Page: 57 / 397

1. SERVICE REMARKS
1.1 GENERAL CAUTION
1. To prevent physical injury, keep hands away from the mechanical drive
components when the main switch is on (especially during the warm-up
cycle). If the Start key is pressed before the copier finishes the warm-up
cycle, (Start indicator starts blinking) the copier starts making copies as
soon as the warm-up cycle is completed.
2. When the development unit, cleaning unit, drum unit or the DF is
removed from the machine, the upper unit becomes lighter. If the upper
unit is released under this condition, it tends to open very abruptly. The
service engineer might be injured if he is leaning over the machine at this
time. Also, the machine might move due to the shock of the upper unit
opening abruptly. To avoid possible injury or machine damage, hold the
upper unit firmly when opening the unloaded upper unit.
3. Even with the above mentioned components installed the upper unit can
open rather rapidly. Due to this possibility it is important to always hold
the upper unit with one hand when releasing it from the lower unit. It is
also important that the operator also be familiar with the proper method
of releasing the upper unit. This condition is not a concern if the DF is
installed to the FT3213.
4. Due to variation in the tolerance of the torsion springs, the upper unit
cannot hold at an angle of 16 degrees by itself when the DF is installed.
To avoid possible injury, always use the upper unit stand to keep the
upper unit open.
1.2 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 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 with a dry cloth or clean
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 can be
damaged.
7. Never expose the drum to corrosive gases such as ammonia gas.
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FSM 4-1 A151/A152