AR-151 (serv.man3). AR151 156-Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 100

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50

01

Lead edge image position adjustment + Paper lead edge/rear edge void adjustment
(Outline)
This adjustment is used to adjust the copy image position and lead edge/rear edge void amount on the copy
paper by adjusting the image scan start position and the print start position (resist roller ON timing) at 100%.
(Operation/Procedure)

1.

When this simulation is executed, the currently set value is displayed in two digits. (Center value: 50)

2.

When the copy mode select key is pressed, each setting mode and the display are changed.

∗

The selected adjustment mode is indicated by the lamps as shown in the table below.

3.

Enter the adjustment value with the 10-key and press the start key. The set value is stored and a copy is
made. (When the set value is increased by 1, the void amount is shifted by 0.1 mm.)

4.

When the clear key is pressed, the set value is stored and the simulation mode is terminated.

(Adjustment method)

1.

Set the print start position (A: AE ON), the lead edge void amount (B: TEXT ON), the scanning start position
(C: PHOTO ON) to zero and make a copy of a scale at 100%.

2.

Measure the image loss R (mm) of the scale.
Set as C = 10 

×

 R (mm). (Example: Set to 30.)

∗

When C is increased by 10, the image loss is decreased
by 1 mm. (Default: 5)

3.

Measure the distance H (mm) from the paper lead edge to
the image print start position.
Set as A = 10 

×

 R (mm). (Example: Set to 50.)

∗

When the value of A is increased by 10, the image lead
edge is shifted toward the paper lead edge by 1 mm.
(Default: 50)

4.

Set the lead edge void amount as B = 50 (2.5 mm).
(Default: 50)

∗

When the value of B is increased by 10, the void is
increased by about 1 mm.
(For 25 or less, however, the void amount becomes zero.)

✩

The SPF adjustment is made by adjusting the SPF image scan start position immediately after turning on the
power.

10

Paper center offset + OC/Document center offset + SPF document center offset
(Outline)
The center offset position of copy image on the copy paper and that of document scan are adjusted by
adjusting the scan left margin of ASIC and the print left margin register set value.
(Operation/Procedure)

1.

When this simulation is executed, the currently set value is displayed.

2.

For a machine with a multi manual paper feed unit installed, when the copy mode select key is pressed, each
set mode and display are changed.
For a machine with a single manual paper feed unit installed, when the copy mode select key is pressed,
each set mode and display are changed.

✩

Machine with a multi manual paper feed unit

Distance from the paper
lead edge to the image
H = 5mm

Image loss
R = 3mm

(Example)

Adjustment mode

Lighting lamps

Print start position (Main cassette)

AE, Main cassette lamps

Print start position (2nd cassette)

AE, 2nd lamps

Print start position (Manual paper feed)

AE, Manual feed lamps

Image lead edge void quantity

TEXT lamp

Image scan start position

PHOTO lamp

Image rear edge void quantity

AE, TEXT, PHOTO lamps

SPF image scan start position

AE, TEXT lamps

Adjustment mode

Display lamp

Print center offset (Main cassette paper feed)

AE, main cassette lamp

Print center offset (2nd cassette paper feed)

AE, 2nd cassette lamp

Print center offset (Manual paper feed)

AE, Manual paper feed lamp

OC/Document center offset

AE, TEXT lamp

SPF/Document center offset

AE, TEXT, PHOTO lamp

AR-F152

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