Service manual

1.4 OPTICS
1. When installing the exposure glass, make sure that the red mark
on the edge of the glass faces up. This side has received a
special treatment to be smoother and generate less static
electricity. This is especially important when the ARDF is
installed.
2. When moving the 1st or 2nd scanners, always hold them at the
center. Move them slowly, carefully, and gently.
Abrupt movement may cause the belt to slip into the wrong
position on the scanner drive pulleys.
3. Do not bend or crease the exposure lamp flat cable. Be careful of
this especially when reinstalling the lens housing cover.
4. When reinstalling the lens housing cover, make sure that the light
shielding mylar on the original length sensor does not interfere
with the light path to the ADS sensor board.
5. Do not touch the following parts with bare hands:
a) Reflectors
b) Exposure lamp
c) Mirrors and lens
d) ID sensor and V
L patterns
6. To clean the mirrors and lens, only use a clean soft cloth damped
with alcohol or water.
7. Do not adjust uneven exposure by changing the exposure lamp
position but by using the exposure adjusting plates. Adjusting the
lamp position is very difficult because the filament cannot be
seen clearly as the lamp is frosted.
8. Adjust the exposure lamp voltage (SP48) only when the drum
initial setting (SP66) is performed.
9. Do not remove the lens housing guide plate and the 3rd scanner
guide plate. They were positioned on the optics base plate with a
special jig at the factory.
FSM 4-3 FT5733/5433