Read Sharp MX-6240N / MX-7040N (serv.man24) Service Manual online
MX-7040N ADJUSTMENTS AND SETTINGS 5 – 91
18-C
Copy image position, image loss, void area
adjustment (Manual adjustment)
(DSPF mode)
adjustment (Manual adjustment)
(DSPF 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 DSPF section is disassembled.
* When the DSPF unit is replaced.
a. Adjustment procedures
1)
Prepare the adjustment chart.
The adjustment chart can be made by the following proce-
dures.
dures.
Use A4 (11" x 8.5") paper and draw arrow marks vertically and
horizontally on the front and the back surfaces.
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.
the front end, and the rear end as well as the identification
marks of the front surface and the back surface.
2)
Enter the SIM 50-6 mode.
* 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 DSPF rear edge image loss setting is provided for coun-
termeasures against the case when shades are produced.
(Lead edge image loss adjustment)
1)
Set the lead edge image loss adjustment values (LEAD EDGE
(SIDE1/SIDE2) on the front surface and the back surface to
the following values.
(SIDE1/SIDE2) on the front surface and the back surface to
the following values.
(Standard set value)
LEAD EDGE (SIDE 1):
20 Lead edge image loss set value (Front surface)
LEAD EDGE (SIDE 2):
40 Lead edge image loss set value (Back surface)
(When the set value is increased, the lead edge image loss is
increased.)
increased.)
(Change for change in the set value: 0.1mm/step)
F
L
R
FACE
BACK
R
T
F
L
T
Front surface
Back surface
Draw arrows.
Draw arrows.
Put the position
marks.
marks.
Put the position
marks.
marks.
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2.
Item/Display
Content
Setting
range
Default
value
A
SIDE1
Front surface
document scan
position adjustment
(CCD)
document scan
position adjustment
(CCD)
1 - 99
50
B
SIDE2
Back surface
document scan
position adjustment
(CCD)
document scan
position adjustment
(CCD)
1 - 99
50
C
Image loss
amount
setting
SIDE1
amount
setting
SIDE1
LEAD_
EDGE
(SIDE1)
EDGE
(SIDE1)
Front surface lead
edge image loss
amount setting
edge image loss
amount setting
0 - 99
20
D
FRONT_
REAR
(SIDE1)
REAR
(SIDE1)
Front surface side
image loss amount
setting
image loss amount
setting
0 - 99
20
E
TRAIL_
EDGE
(SIDE1)
EDGE
(SIDE1)
Front surface rear
edge image loss
amount setting
edge image loss
amount setting
0 - 99
40
F
Image loss
amount
setting
SIDE2
amount
setting
SIDE2
LEAD_
EDGE
(SIDE2)
EDGE
(SIDE2)
Back surface lead
edge image loss
amount setting
edge image loss
amount setting
0 - 99
40
G
FRONT_
REAR
(SIDE2)
REAR
(SIDE2)
Back surface side
image loss amount
setting
image loss amount
setting
0 - 99
20
H
TRAIL_
EDGE
(SIDE2)
EDGE
(SIDE2)
Back surface rear edge
image loss amount
setting
image loss amount
setting
0 - 99
20
I
OFFSET_SPF1
DSPF front surface
document off-center
adjustment
document off-center
adjustment
1 - 99
50
J
OFFSET_SPF2
DSPF back surface
document off-center
adjustment
document off-center
adjustment
1 - 99
50
K
SCAN_SPEED_SPF1
DSPF document front
surface magnification
ratio (Sub scan)
surface magnification
ratio (Sub scan)
1 - 99
50
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