Optics; Development Unit - Ricoh FT5540 Service Manual

31 August 1989
2. After cleaning the erase lamp filter, rub it lightly with your finger to discharge any static
electricity on the filter surface.

5.4 Optics

1. A small amount of Iauna oil should be used to lubricate the following parts:
a) Scanner Guide Rods
b) Scanner Guide Rod Pads
c) Lens Housing Guide Rods
2. Clean the exposure glass with glass cleaner and a dry cloth to reduce the amount of static
electricity on the glass surface.
3. Do not touch the following parts with bare hands:
a) Reflectors
b) Exposure lamps
c) Mirrors and lens
4. Do not bend or crease the exposure lamp ribbon cable or the fiber cables.
5. The scanners are fragile, so to move one manually, push on the scanner guide bracket,
not the scanner.
6. Do not touch the mirror surface with your fingers. When replacing a mirror, make sure the
surface faces the optical path.
7. Even when the lamps are off, electricity continues to run through them. Make sure that the
power is off when working in this area.
8. Only use water or a silicon cloth to clean the mirrors and the lens.

5.5 Development Unit

1. Do not force the development roller to turn opposite to the normal direction of rotation be-
cause this may damage the gears.
2. Be careful not to nick or scratch the development roller sleeve (made of aluminum).
3. Always check to make sure that there are no splits in the upper brush seal. Any splits at
this location will cause toner scattering.
4. Always keep a sheet of paper under the development unit when it is out of the copier. This
prevents any small pieces of metal (staples, clips, E-rings, etc.) from being attracted to the
development roller and getting inside the unit.
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