Sharp SF-2040 Service Manual page 82

Mirror base wire tension adjustment
1 Manually turn the mirror base drive pulley to shift mirror base B
which is at the mirror base positioning plate 20 to 30mm to the
paper exit side.
2 Turn the mirror base wire tension adjustment screw clockwise to
apply tension to the wire until the wire tension spring edge makes
contact with the projection of mirror base B.
Wire tension spring
Mirror base B projection
Tension adjustment plate
Mirror base wire
Tension adjustment screw
3 Manually turn the mirror base pulley to make mirror base B per-
form full scan a few times, and check that the mirror base wire
spring edge is in contact with the projection of mirror base B. If
they are not in contact with each other, adjust by turning the
tension adjustment screw again. In this case, check also that
there is no slack in the wire on the mirror base pulley.
4 Turn the mirror base wire tension adjustment screw 6 turns
counterclockwise. (Then the distance between the mirror base
wire spring and the projection of mirror base B will be about
4mm.)
Mirror base B projection
(Perform the same procedures for the front frame side and the rear
frame side.)
Copy lamp unit installing position
1 Pass the front/rear mirror base drive wire between the copy lamp
unit frame and the wire fixing plate.
In this case, do not tighten the wire fixing screw.
2 Press the copy lamp unit onto the positioning plate and tighten the
wire fixing plate.
Apply tension until the spring comes in
contact with the projection.
Mirror base
wire
4.0mm
F
No. 2/3 mirror base unit installing position
This adjustment is to adjust parallelism of the mirror base B to the
drum surface and the original surface.
1 Manually turn the mirror base drive pulley to bring mirror base B
into contact with the mirror base positioning plate. In this case,
when the front frame side and the rear frame side of mirror base B
are simultaneously brought into contact with the mirror base
positioning plate, the parallelism of mirror base B is proper and
there is no need for adjustment.
A
6 – 21
R