Sharp SF-2020 Service Manual page 62

7
Remove the drive wire spring and the wire hook from the lens
carriage boss.
Wire SP
8
Remove the L pulley and the L drive pulley from the lens wire.
B. Lens wire stretching
1. This procedure is performed in the following case.
(1) When the lens unit is removed.
(2) When No. 4/5 mirror drive unit is disassembled.
(3) When the copy is out of focus because relative position of the lens
unit and No. 4/5 mirror unit is shifted by moving the lens unit itself
back and forth without turning the L drive pulley.
* In order to move the lens unit of this machine back and forth in
servicing, be sure to turn the L drive pulley. (If the lens unit itself is
moved, the wire may slip at the L drive pulley and the relative
position of the lens unit and No. 4/5 mirror unit is shifted, resulting
in improper focusing.)
L drive pulley
Lens unit
Wire hook
L drive pulley
Lens unit
2. Procedures
1
Manually move the lens carriage unit to fit the lens carriage hole
with the optical unit frame hole (which is not the home position
hole but the reduction side hole). Insert a pin into the holes, fix the
lens unit, and stretch the wire.
2
Under the above state, fit the zooming cam drive gear hole with
the No. 4/5 drive unit base hole A (by inserting a pin, etc.), and
insert the zooming can drive gear into the shaft.
Zooming cam drive gear
Shaft
3
Remove the pin which fixes the lens unit and the zooming cam.
6 – 14
Lens carriage unit
Hole
Hole A
Hole B