Read Sharp AR-C262M (serv.man3) Service Manual online
AR-C262M SETTING AND ADJUSTMENTS 8 - 19
This adjustment must be performed in the following cases:
• When the CCD unit is removed from the machine.
• When the CCD unit is replaced.
• When the copy image focus is improper.
• When the copy magnification ratio in the copy image main scan-
ning direction is not proper.
• When the MFP main PWB is replaced.
• When the EEPROM of the MFP main PWB is replaced.
• When a U2 trouble occurs.
1) Enter the SIM 48-1 mode.
2) Set the set item B to 50 (initial value).
3) As shown in the figure below, place 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
according to the following formula.
Main scanning direction copy magnification ratio
=
x 100 [%]
(Example) Fit 10mm of the scale with 10mm of the copied scale
and compare them.
Main scanning direction copy magnification ration
=
x 100 = 1
If the copy magnification ratio is not satisfactory, perform the
following procedure.
following procedure.
7) Remove the original guide L and R, and remove the table
glass.
8) Remove the dark box cover.
9) Loosen the CCD unit fixing screws.
Draw a marking line on the CCD unit base as shown below in
order to avoid a shift in the optical axis of the CCD unit.
order to avoid a shift in the optical axis of the CCD unit.
At that time, fix the CCD unit so that it is in parallel with the
marked line in procedure 9).
marked line in procedure 9).
∗
Never loosen the screws marked with "
✕
."
If one of these screws is loosened, the CCD unit base posi-
tion and angle may be changed. If so, it cannot be adjusted
in the market, and therefore the whole scanner unit must be
replaced.
tion and angle may be changed. If so, it cannot be adjusted
in the market, and therefore the whole scanner unit must be
replaced.
10) Slide the CCD unit in the arrow direction (CCD sub scanning
direction) to change the installing position.
When the copy image is longer than the original, move in the
direction of B.
direction of B.
When the copy image is shorter than the original, move in the
direction of A.
direction of A.
One scale of scribe line corresponds to 0.2%.
At that time, fix so that the CCD unit is in parallel with the
scales on the front frame side and on the rear frame side of
the CCD unit base.
scales on the front frame side and on the rear frame side of
the CCD unit base.
At that time, fix the CCD unit so that it is in parallel with the
marked line in procedure 9).
marked line in procedure 9).
ADJ 7
Copy image focus
(main scanning direction copy
magnification ratio) adjustment
(CCD unit position adjustment)
(main scanning direction copy
magnification ratio) adjustment
(CCD unit position adjustment)
10
20
30
40
50
60
70
80
90
50
100110
120130140
(Original dimension – Copy dimension)
Original dimension
100 – 99
100
10
20
90
100
110
10
20
90
100
110
100mm scale
(Original)
(Original)
Copy image
(1mm (1%)
shorter than
the original)
(1mm (1%)
shorter than
the original)
1.0mm
A
B
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