Read Sharp AR-285 (serv.man11) Service Manual online
4) Move the mirror base B rail position up and down (in the arrow
direction) to adjust.
•
When La > Lb, move the mirror base B rail on the paper
exit side upward by the half of the difference of La – Lb.
exit side upward by the half of the difference of La – Lb.
•
When La < Lb, move the mirror base B rail on the paper
exit side downward by the half of the difference of Lb - La.
exit side downward by the half of the difference of Lb - La.
Example: When La = 12mm and Lb = 9mm, move the
mirror base B rail on the paper exit side 1.5mm
upward.
upward.
•
When Lc > Ld, move the mirror base B on the paper feed
side downward.
side downward.
•
When Lc < Ld, move the mirror base B on the paper feed
side upward.
side upward.
When moving the mirror base rail, hold the mirror base rail
handle.
handle.
5) Adjust so that La = Lb and Lc = Ld.
6) After completion of the adjustment, manually turn the mirror base
drive pulley to make full scanning of mirror base A and mirror
base B and check that they do not make contact.
base B and check that they do not make contact.
If the mirror base rail is moved extremely, the mirror base may
be brought into contact. Be careful of that.
be brought into contact. Be careful of that.
(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.
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.
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)
(Original)
Copy image
(2mm (2%)
shorter than the
original)
(2mm (2%)
shorter than the
original)
1mm
7 – 10
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