Ricoh FW830, Service Manual

Page: 135 / 227

6.2 CHARGE CORONA
1. Clean the charge corona wire by turning the gear of the wire cleaner pads
clockwise until it stops, then turn the gear counterclockwise and the wire
cleaner pads move to the original position.
The wire can also be cleaned with a blower brush. If the wire is cleaned
with a dry cloth, make sure that the wire does not become stretched. Do
not use sand paper or a solvent.
2. Do not touch the corona wire and the grid wires with oily hands. Oil stains
may cause uneven image density on copies.
3. Make sure that the corona wire is correctly positioned between the
cleaner pads and that there is no foreign material (iron filings, etc.) on the
casing.
4. When adjusting the charge corona current, always use the current meas-
uring drum.
5. Clean the grid wires with a dry cloth.
6.3 OPTICS
1. Clean the exposure glass with water or alcohol.
2. Clean the fiber optics array with lens paper or silicone cloth.
SERVICE REMARKS 31 December 1992
4-50