SHARP SP1974 Technical Report

Date: Nov. 30, 1995

COPIER : SF-2050

1. MEASURE TO PREVENT CRACKING WHEN THE CONNECTOR IS CONNECTED
IN THE DC POWER SUPPLY PWB.

2. ADDITION OF A 4/5 LOCK SHEET.

3. IMPROVEMENT MEASURE TO STRENGTHEN THE UPPER PAWL LEVER OF THE
FUSING UPPER UNIT.

4. MEASURE TO PREVENT DIAGONAL FEEDING IN THE ADU UNIT.

No. : SP-1974

1. Measure to prevent cracking when the connector is connected in the DC power
supply PWB.

1.Model name: SF-2050

2.General: There is a danger of the DC power supply PWB cracking if the connector is inserted

strongly when connecting it. To alleviate this problem, a support has been added to the
lower side of the connector (CN702).

New machine (temporary measure).

Range of part packaging.

Connector CN702.

Added metal support for the PWB.

New machine (permanent measure).

Range of part packaging.

Connector CN702.

The metal pattern for the chassis has been changed, and a bent section has
been added to support the PWB.

3.Action: Temporary measure: From the start of 1995 May production to 1995 September
production.

Permanent measure: 100 V series: From the start of 1995 October production.

200 V series: Running change from 1995 mid-November production.

SHARP CORPORATION Reprography Division

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Green

C

2. Addition of a 4/5 lock sheet.

1.Model name: SF-2050

2.General: A 4/5 mirror lock sheet has been added as illustrated in the figure shown below, making

it easier to remove the 4/5 mirror lock screw. This change have been carried out as an
improvement measure to increase operationability during the installation of the machine.

4-5 mirror lock screw

4-5 lock sheet

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

3. Improvement measure to strengthen the upper pawl lever of the fusing upper unit.

1.Model name: SF-2050

2.General: The marginal strength which was allotted the upper pawl lever of the fusing upper unit

was insufficient, and to alleviate this problem and strengthen the upper pawl lever a
change was carried out in the shape of the lever as illustrated in the figure shown below.

Strengthened section.

Three (3) ribs.

Old

Knurling.

New

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

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