SHARP SP1902 Technical Report

Date: Jul. 19, 1995

COPIER : SF-2022

1. MEASURES TO PREVENT ABNORMAL NOISE AND DOUBLE FEEDING IN THE 500
CASSETTE PAPER FEEDER UNIT .

2. CHANGE IN THE TENSION SPRING (TO PREVENT CONTACT WITH THE DEVELOPING UNIT).

3. EARTH CONDUCTION IMPROVEMENT MEASURES FOR THE TC CASE.

4. CHANGE IN SCREWS DUE TO A CHANGE IN SUPPLIERS.

1. Measures to prevent abnormal noise and double feeding in the 500 cassette paper
feeder unit.

1.Model name: SF-2022/2027/2035/1025
SF-CM1 1/D19/D20/D21

No. : SP-1902

2.General: Double feeding and abnormal noise sometimes occurs when paper feeding operations
are carried out on the 500 cassette paper feeder unit. To alleviate this problem the
following measures have been taken.

3.Description: The load of the reverse roller lever spring has been slightly lessened (315g ±15). The
changed spring has been painted yellow to differentiate it from the original springs.

4.Action: From 1995 mid-February production.

2 Change in the tension spring (To prevent contact with the developing unit.)

1.Model name: SF-2022/2027/2035/1025

2.General: The tension fulcrum spring was too long and there was danger of it coming in contact

with the developing unit. To alleviate this problem the spring has been changed to a
shorter spring. (This change is designated by the arrows in the figure).

SHARP CORPORATION Reprography Division

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Green

C

3.Action: SF-1025: From 1994 mid-August production.
SF-2027/2035: From the start of 1994 September production.
SF-2022: From 1994 mid-September production.

3. Earth conduciton improvement measures for the TC case.

1.Model name: SF-2022/2027

2.General: In order to improve the earth conducting of the TC case unit, the material of the charger

case plate spring and the shape of the spring has been changed. (This change has
been carried out on the right side only.) In accordance with this change the parts codes
for the TC case unit have also been changed.

The plate spring ends should not come above the wall.

3.Action: From the start of 1995 May production.

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