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Sharp MX-M356N Service Manual page 77

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15-C
Copy image position, image loss, void area
adjustment (Manual adjustment)
(RSPF mode)
This adjustment must be performed in the following cases:
* When the scan control PWB is replaced.
* When the EEPROM on the scan control PWB is replaced.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When U2 trouble occurs.
* When the RSPF section is disassembled.
* When the RSPF unit is replaced.
a. Adjustment procedures
1)
Prepare the adjustment chart.
The adjustment chart can be made by the following proce-
dures.
Use A4 (11" x 8.5") paper and draw arrow marks vertically and
horizontally on the front and the back surfaces.
At the same time, put marks of the lead edge, the trail edge,
the front end, and the rear end as well as the identification
marks of the front surface and the back surface.
R
L
F
Draw arrows.
R
L
F
Draw arrows.
Front surface
FACE
T
Put the position
marks.
Back surface
BACK
T
Put the position
marks.
MX-M316N ADJUSTMENTS AND SETTINGS 5 – 37
2)
Enter the SIM 50-6 mode.
Item/Display
A
SIDE1
B
SIDE2
C
Image
LEAD_EDGE
loss
(SIDE1)
amount
setting
D
FRONT_REAR
SIDE1
(SIDE1)
E
TRAIL_EDGE
(SIDE1)
F
Image
LEAD_EDGE
loss
(SIDE2)
amount
setting
G
FRONT_REAR
SIDE2
(SIDE2)
H
TRAIL_EDGE
(SIDE2)
I
OFFSET_SPF1
J
OFFSET_SPF2
K
SCAN_SPEED_SPF1
L
SCAN_SPEED_SPF2
* Item A, B: When the adjustment value is increased, the scan
timing is delayed.
* Item C - H: When the adjustment value is increased, the
image loss is increased.
* Item A - H: 1 step = 0.1mm change
* The RSPF rear edge image loss setting is provided for coun-
termeasures against the case when shades are produced.
Setting
Default
Content
range
value
Front surface
1 - 99
document scan
position
adjustment (CCD)
Back surface
1 - 99
document scan
position
adjustment (CCD)
Front surface lead
0 - 99
edge image loss
amount setting
Front surface side
0 - 99
image loss amount
setting
Front surface rear
0 - 99
edge image loss
amount setting
Back surface lead
0 - 99
edge image loss
amount setting
Back surface side
0 - 99
image loss amount
setting
Back surface rear
0 - 99
edge image loss
amount setting
RSPF front surface
1 - 99
document off-
center adjustment
RSPF back
1 - 99
surface document
off-center
adjustment
RSPF document
1 - 99
front surface
magnification ratio
adjustment (Sub
scan)
RSPF document
1 - 99
back surface
magnification ratio
adjustment (Sub
scan)
50
50
20
20
30
20
20
30
50
50
50
50

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