Ricoh DD 4450 Service Manual page 13

During Maintenance
General
Before you begin a maintenance procedure:

1) Switch the machine off
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2) Disconnect the power plug from the power source.
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Safety Devices
Never remove any safety device unless it requires replacement. Always replace safety

devices immediately.
Never do any procedure that defeats the function of any safety device. Modification or

removal of a safety device (fuse, switch, etc.) could lead to a fire and personal injury.
Always test the operation of the machine to ensure that it is operating normally and safely
after removal and replacement of any safety device.
For replacements use only the correct fuses or circuit breakers rated for use with the

machine. Using replacement devices not designed for use with the machine could lead to
a fire and personal injuries.
Organic Cleaners
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
dry rags to soak up spills.