Ricoh FT7770 Service Manual page 206

30 April, '89
<Erase Lamp>
1. A narrower lead edge erase margin increases the possibility of fusing
jams. At least, l.0mm of margin is necessary to prevent fusing jams.
2. After cleaning the erase lamp filter, discharge any static charge on the
filter surface with a finger before replacing the unit.
<Optics>
1. Do not touch the exposure lamp positioning brackets.
2. A small amount of launa oil or equivalent oil should be used to lubricate
the following parts:
a) Scanner Guide Rods
b) Scanner Guide Rod Pads
c) Lens Housing Guide Rods
3. Clean the exposure glass with glass cleaner and a dry cloth to reduce
static electricity on the glass which attracts foreign substances (dust,
oil, etc.).
4. Do not touch the following parts with bare hands:
a) Reflectors
b) Exposure lamps
c) Mirrors and lens
5. Do not bend or crease the ribbon cable of the exposure lamp and the
fiber cable of the automatic density sensor.
6. To move the scanner manually, use the scanner guide bracket, not the
exposure lamp unit which is easily damaged.
7. Do not replace individual exposure lamps. Replace the exposure lamps
and reflectors as a unit.
8. Do not touch the surface coat of the mirrors with your fingers. When
replacing the mirrors, make sure the surface coat faces the optical path.
9. Even when the lamps are off, there is voltage present across them.
Make sure that the power is off when working in this area.
10. Clean mirrors and lens with water or silicone cloth only.
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