Ricoh D131 Service Manual page 1390

During preventive maintenance, never use any organic cleaners (alcohol, etc.)
other than those described in the service manual.
Make sure the room is well ventilated before using any organic cleaner. Use organic
solvents in small amounts to avoid breathing the fumes and becoming nauseous.
Switch the machine off, unplug it, and allow it to cool before doing preventive
maintenance. To avoid fire or explosion, never use an organic cleaner near any part
that generates heat.
Wash your hands thoroughly after cleaning parts with an organic cleaner to
contamination of food, drinks, etc. which could cause illness.
Clean the floor completely after accidental spillage of silicone oil or other materials
to prevent slippery surfaces that could cause accidents leading to hand or leg
injuries. Use "My Ace" Silicone Oil Remover (or dry rags) to soak up spills. For more
details, please refer to Technical Bulletin "Silicone Oil Removal" (A024-50).
Ozone Filters
Always replace ozone filters as soon as their service life expires (as described in
the service manual).
An excessive amount of ozone can build up around machines that use ozone filters
if they are not replaced at the prescribed time. Excessive ozone could cause
personnel working around the machine to feel unwell.
Power Plug and Power Cord
Before servicing the machine (especially when responding to a service call), always
make sure that the power plug has been inserted completely into the power source.
A partially inserted plug could lead to heat generation (due to a power surge caused
by high resistance) and cause a fire or other problems.
Always check the power plug and make sure that it is free of dust and lint. Clean it if
necessary. A dirty plug can generate heat which could cause a fire.
Inspect the length of the power cord for cuts or other damage. Replace the power
cord if necessary. A frayed or otherwise damaged power cord can cause a short
circuit which could lead to a fire or personal injury from electrical shock.
Check the length of the power cord between the machine and power supply. Make
sure the power cord is not coiled or wrapped around any object such as a table leg.
Coiling the power cord can cause excessive heat to build up and could cause a fire.
Make sure that the area around the power source is free of obstacles so the power
cord can be removed quickly in case of an emergency.