Ricoh BP20 Service Manual page 22

ASSEMBLY/DISASSEMBLY PRECAUTIONS
Replace with approved parts only. Take care to note the exact location of parts and
the correct cable routing before you disassemble any part of the machine. Ensure
all parts and cables are replaced correctly. Perform the following procedures before
you disassemble the machine or replace any parts.
1. Check the contents of the machine
memory and make a note of any
user settings. These will be erased
if the main board or network card
is replaced.
2. Ensure that power is disconnected
before you service or replace any
electrical parts.
3. Disconnect printer interface cables
and power cables.
4. Use only approved spare parts.
Ensure that part number, product name,
voltages, current and/or temperature rating
are correct.
5. When removing or re-fitting any
parts, do not use excessive force
(especially when fitting screws into
plastic).
6. Take care not to drop any small
parts into the machine.
7. Handling of the OPC Drum:
• The OPC Drum can be damaged
if it is exposed to light.
• Take care not to expose the OPC
Drum either to direct sunlight, or
fluorescent light or incandescent
lighting. Exposure for as little as 5 minutes can damage the surface's
photoconductive properties and will result in print quality degradation.
Remove the OPC Drum and store it in a black bag or other lightproof
container. Take care when working with the covers (especially the top cover),
since light can be admitted to the OPC area and can damage the OPC Drum.
• Take care not to scratch the green surface of OPC Drum Unit. If the green
surface of the Drum Cartridge is scratched or touched, the print quality will be
compromised.
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