SHARP SP1916 Technical Report

Date: Jul. 31, 1995

COPIER : SF-2116

No. : SP-1916

1.PRECAUTIONS TO BE TAKEN DURING

MAINTENANCE TO THE OPTICAL UNIT

2.REGARDING PROBLEMS WITH THE L4-01

1.Precautions to be taken during maintenance to the optical unit.

1.Model Name: SF-2116/ 21 18/1016/1018

2.General: In order to help prevent problems during market use, please take note of the following.

3.Description: Do not handle the zoom mechanism for models with only one cam and one motor in the

same way as has been done for past models (SF-2022/2027, which have two motors).
If you move the lens of the one motor models by hand, (as was the procedure for the
two motor models), the lens drive wire is likely to get caught in the lens carriage. (see
Fig. 1).

Fig. 1

Lens drive wire

Lens carriage

SHARP CORPORATION Reprography Division

1/4

Green

C

If you must move the lens by hand, do it by rotating the step gear which is connected to
the mirror motor. (See Fig. 2)

Fig. 2

4/5 Mirror UN

Step gear
(rotating this gear moves
the lens)

Lens

Base sticker

If the lens wire has come off of the teeth of its guide, please carry out the following
procedure.

(1) Remove the lens wire (see the Service Manual)

(2) When reattaching the wire, place a pin

or screwdriver (as a temporary fixing
measure) in the opening which you will
find slightly closer to the other end than
the home position and then proceed to
attach the wire. (See Fig. 3)

The original home position

Fig. 3 - the lens carriage in its temporarily fixed position

(3) While the pin or screwdriver of (2) is still

attached, use φ4 pins or M4 screws to fix
the openings in the scaling cam drive
gear to the openings in the zoom base
temporarily. Then attach the scaling
drive gear. (See Fig. 4)

There is a sticker here

φ4 pins (or longer M4 screws) used

as a temporary f i xing measure

The scaling cam drive gear

2/4

Fig. 4 - Attaching the scaling cam drive gear

Note: this opening