Sharp AR-M450 Service Manual page 43

Note for CCD/lens unit installation
<1>Adjust the CCD unit adjustment value listed in the table below
with the scribed line on the lens base.
+4 scales
+3 scales
+2 scales
+1 scale
Reference
-1 scale
-2 scales
-3 scales
-4 scales
<2>Make a sample copy at the above position, and measure
the magnification ratio.
<3>Change the installing position in the horizontal direction to
adjust the magnification ratio.
•When the copy image is longer than the original, shift to
the positive (+) direction.
•When the copy image is shorter than the original, shift to
the negative (-) direction.
* 1 scale of the scribed line corresponds to 0.3% of
magnification ratio.
* If this adjustment is not satisfactory, make a fine adjustment
with SIM 48-1.
(Refer to the adjustment described below.)
q. Scanner interface PWB
1) Remove the table glass.
2) Remove the PWB cover and the harness cover.
1)
2)
1)
1)
CCD unit adjustment value
(+) direction
Reference line
(-) direction
1 scale: 1.4mm
CCD adjustment value
5.0~
3.6~4.9
2.2~3.5
0.8~2.1
-0.6~0.7
-2.0~ -0.7
-3.4~ -2.1
-4.8~ -3.5
~ -4.9
3)
1)
4)
3)
AR-M350 DISASSEMBLY AND ASSEMBLY, MAINTENANCE 7-8
3) Remove the scanner interface PWB.
2)
1)
2)
1)
1)
(3) (D) SPF unit
a. Upper transport unit
1) Remove the upper transport unit cover.
2) Remove the upper transport unit.
!
1)
2)
2)
3)
"
!