SHARP DTE119 Technical Report

Date: Jul. 6, 1994

DUPLICATOR: SD-2060

No. : DTE-119

TROUBLE SHOOTING WHITE SPOT ON THE
REAR END OF BACK SIDE COPIES.

1.General: Problems with white spot occurring on the rear end of half tone, and back side copies

have occurred in the SD-2060 models. T o remedy the problem, the following changes
have been carried out. SD-3062 have been changed from first lot production.

2.Description: 1. Change in the TC / AC case unit.
By moving the copy point further down in the flow (on the AC side), sagging of the rear
end of the copy paper can be prevented.

Changed AC guide (Black → White).

Changed TC holder F.

Discontinued
TC holder spacer F.

Changed TC case.
The center plate has been moved

3.5 mm toward the AC side.

Change the number of AC wires from 2 to 1.

Changed TC holder R.
The position of the wire has
been moved 3.5 mm toward
the TC side only. On the AC
side it has been moved
downward 1 mm. (The same
change has been carried out
on TC holder F.)

Discontinued
TC holder spacer R.

Changed TC guide sheet
assembly.

TC electrode plate sheet assembly.
(CSHEP3636FC31)

Pre-transfer guide sheet
assembly.

SHARP CORPORATION Reprography Division

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Green

C

In accordance with the change in the TC / AC case units, the adjustment values for the
printer charger drum current and break away voltage have changed.

Old New

Electric current of the printer charger drum.

Break away voltage. +320 ±20V +440 ±20V

-55 ±5µA

<

F-R 5µA

=

-50 ±5µA

<

F-R 7µA

=

2. Change in the center tray unit.
(Change in the transport path of the suction area, and addition of starting powder
coating below the suction belts affected by the change in the transport path, described
above.

Discontinuation of the S reinforcement paper guide. (quantity: 1).
Discontinuation of the S roller D shaft. (quantity: 2).
Discontinuation of M3 roller. (quantity: 4).
Discontinuation of SC DC brush. (quantity: 2).
Discontinuation of SUB P/G tape A. (quantity: 2).
Discontinuation of SUB P/G tape B. (quantity: 1).
Change in screw quantity (M4 x 8 tight). (10 → 4).

All parts within the outlined area
have been discontinued.

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Starting powder coating.

Starting
powder
coating.

The parts codes for the center tray unit have been changed in accordance with the
changes described above.

3. Change in the suction fan unit.
The air volume control mylar has been discontinued to increase the suction absorption
capacity.

Air volume control mylar

4. Change in the front frame unit.
(Discontinued in accordance with the changes in the suction area, described above.)
Discontinuation of the upper suction guide. (quantity: 1).
Discontinuation of the front separation pawl. (quantity: 1).
Discontinuation of the rear separation pawl. (quantity: 1).
Discontinuation of the separation pawl washers. (quantity: 4).
Discontinuation of screw (M4 x 8 hexagonal) (quantity: 1).

Screw (M4 x 8 hexagonal).

Separation pawl F.

FU acuride attachment plate (right side).

Upper suction guide.

Separation pawl R.

Separation washer.

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