Sharp AR-250, Руководство по обслуживанию

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(5) Main scanning direction magnification ratio
adjustment (CCD unit installing position adjustment)
1) Execute SIM 48-1.
2) Set each value to 50 (initial value).
3) As shown in the figure below, put a scale on the original table.
illust: AR-280
4) make a normal copy on A4 paper.
5) Compare the scale image length and the actual scale length.
6) Obtain the main scanning direction copy magnification ratio ac-
cording to the following formula.
Main scanning direction copy magnification ratio
=
(
Original length – Copy length
)
Original length
´
100%
(Example) Put the scale so that 50mm of the scale is at the
center of the original.
Main scanning direction copy magnification ratio
=
100 – 98
100
´
100 = 2
7) Remove the original guide L and R, and remove the table glass.
8) Remove the dark box cover.
9) Remove the slide pin of the front cover unit.
10) Insert the slide pin as shown below and make positioning in the
vertical direction.
11) Insert the slide pin as shown below and make positioning in the
horizontal direction.
(Initial position positioning is completed.)
*
Never loosen the screws which are not indicated in the figure.
If loosened, the adjustment cannot be made and the unit must be
replaced.
12) Make a sample copy in the initial position and measure the
magnification ratio again.
13) Change the installing position in the horizontal direction to adjust
the magnification ratio.
10
20
30
40
50
60
70
80
90
50
100
110
120130
140
A4
10 20 90 100 110
1mm
10 20 90 100 110
100mm scale
(Original)
Copy image
(2mm (2%)
shorter than the
original)
1mm
Never loosen a screw other than these ones.
A
B
7/13/2000 6 – 12