SHARP SP1955 Technical Report

Date: Nov. 10, 1995

COPIER : SF-2050

1. MEASURES TO PREVENT DOUBLE FEEDING IN THE MANUAL MULTI PAPER FEEDING UNIT.

2. TROUBLE SHOOTING ABNORMAL NOISE FROM THE LENS DRIVE PULLEY IN THE OPTICAL UNIT.

3. MEASURES TO IMPROVE FIXING PERFORMANCE.

4. MEASURES TO IMPROVE THE MEASUREMENT TOLERANCE OF THE PAPER FEEDING ROLLER
SHAFT IN THE ADU UNIT.

No. : SP-1955

1. Measures to prevent double feeding in the manual multi paper feeding unit.

1.Model name: SF-2050.

2.General: The measures described below have been carried out to prevent problems of double

feeding in the manual multi paper feeding unit.

3.Description: The shape of the cushion material and the mylar of the delivery roller section has been
changed, and white grease has been applied to the pressure release lever.

Manual feed sheet

Sound proof
sheet

White grease has been
applied to the end
section of the pressure
release lever

Original 10 changed to 5

Delivery roller

4.Action: From the start of 1995 August production.

SHARP CORPORATION Reprography Division

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Green

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2. Trouble shooting abnormal noise from the lens drive pulley in the optical unit.

1.Model name: SF-2050.

2.General: Abnormal noise sometimes occurs when the lens moves to change position. This is

caused by the level difference between the lens drive wire and the lens drive pulley. To
alleviate this problem, the measures described below have been carried out.

3.Description: The maximum position of the lens drive pulley has been changed in order to lessen the
level difference between the lens drive wire and the lens drive pulley.

Note: The color of the lens drive pulley has been changed from black to white in order
to distinguish between the old and new units.

4.Action: From the start of 1995 June production.

3. Measures to improve fixing performance.

1.Model name: SF-2050.

2.General: The coating thickness and surface roughness of the heat roller has been changed to

improve fixing performance.

The changes in shape described below have been carried out to distinguish the
modified part from old one.

Front side

End face of the heat roller

Added R2.5
Black marking

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

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