Sharp MX-M623U / MX-M753U (serv.man10) Service Manual ▷ View online
MX-M753N ADJUSTMENTS AND SETTINGS 5 – 48
19-B
Sub scanning direction image
magnification ratio adjustment
(Document table mode)
magnification ratio adjustment
(Document table mode)
1)
Place a scale on the document table as shown in the figure
below.
below.
2)
Enter the SIM 48-1 mode.
3)
Make a normal copy and obtain the copy magnification ratio.
Press [CLOSE] key to shift from the simulation mode to the
copy mode, and make a copy.
Press [CLOSE] key to shift from the simulation mode to the
copy mode, and make a copy.
4)
Check that the copy magnification ratio is within the specified
range (100
range (100
1.0%).
If the copy magnification ratio is within the specified range (100
1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
5)
Change the CCD (SUB) adjustment value of Simulation 48-1.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
19-C
Main scanning direction image
magnification ratio adjustment
(DSPF mode)
magnification ratio 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 U2 trouble occurs.
* When the copy magnification ratio is not matched.
* When the DSPF is disassembled.
* When the scan control PWB is replaced.
* When the EEPROM on the scan control PWB is replaced.
* When U2 trouble occurs.
* When the copy magnification ratio is not matched.
* When the DSPF is disassembled.
a. Adjustment procedures
1)
Place the duplex adjustment chart shown below on the docu-
ment tray of the DSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.
ment tray of the DSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.
2)
Make a duplex copy at the normal ratio on A4 paper.
3)
Measure the images on the copy paper and the original
images.
images.
4)
Obtain the image magnification ratio according to the following
formula:
Image magnification ratio = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
(100
formula:
Image magnification ratio = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
(100
0.8%), there is no need to perform the adjustment.
If it is not within the specified range, perform the following pro-
cedures.
cedures.
5)
Enter the SIM 48-1 mode.
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
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2.
10
20
90
100
110
10
20
90
100
110
10
20
90
100
110
(Example 1)
Copy A
(Shorter than
the original)
Copy A
(Shorter than
the original)
(Example 2)
Copy B
(Longer than
the original)
Copy B
(Longer than
the original)
Scale
(Original)
(Original)
Copy magnifi-
cation ratio
cation ratio
(Original dimension - Copy dimension)
Original dimension
100%
A4 size
(Both the front surface
and the back surface)
10mm
10mm
Paper pass direction
original
10
50
100
150
200
250
copy
10
50
100
150
200
250
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2.
MX-M753N ADJUSTMENTS AND SETTINGS 5 – 49
* Items A, C, E: When the set value is increased by 1, the
magnification ratio is increased by 0.02%.
* Items B, D: When the set value is increased by 1, the magni-
fication ratio is increased by 0.1%.
* It affects scanning (PC scanning, etc.) as well as copying.
6)
Select an adjustment item of SPF (MAIN)/SPFB (MAIN) with
the scroll key.
the scroll key.
7)
Enter an adjustment value with 10-key, and press [OK] key.
When the adjustment value is increased, the image magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the image magni-
fication ratio is changed by 0.02%.
When the adjustment value is increased, the image magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the image magni-
fication ratio is changed by 0.02%.
NOTE: When [CLOSE] key is pressed in this simulation mode, the
machine goes into the normal operation mode. Under this
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
19-D
Sub scanning direction image
magnification ratio adjustment
(DSPF mode)
magnification ratio 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 U2 trouble occurs.
* When the copy magnification ratio is not matched.
* When the DSPF is disassembled.
* When the scan control PWB is replaced.
* When the EEPROM on the scan control PWB is replaced.
* When U2 trouble occurs.
* When the copy magnification ratio is not matched.
* When the DSPF is disassembled.
a. Adjustment procedures
1)
Place the duplex adjustment chart shown below on the docu-
ment tray of the DSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.
ment tray of the DSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.
2)
Make a duplex copy at the normal ratio on A4 paper.
3)
Measure the images on the copy paper and the original
images.
images.
4)
Obtain the image magnification ratio according to the following
formula:
Image magnification ratio = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
(100
formula:
Image magnification ratio = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
(100
0.8%), there is no need to perform the adjustment.
If it is not within the specified range, perform the following pro-
cedures.
cedures.
5)
Enter the SIM 48-1 mode.
* Items A, C, E: When the set value is increased by 1, the
magnification ratio is increased by 0.02%.
* Items B, D: When the set value is increased by 1, the
magnification ratio is increased by 0.1%.
* It affects scanning (PC scanning, etc.) as well as copying.
6)
Select an adjustment item with the scroll key.
Item
Display
Content
Setting
range
Default
value
A
CCD(MAIN)
SCAN main scanning
magnification ratio
adjustment (CCD)
magnification ratio
adjustment (CCD)
1 - 99
50
B
CCD(SUB)
SCAN sub scanning
magnification ratio
adjustment (CCD)
magnification ratio
adjustment (CCD)
1 - 99
50
C
SPF(MAIN)
DSPF document front
surface magnification ratio
adjustment (Main scan)
surface magnification ratio
adjustment (Main scan)
1 - 99
50
D
SPF(SUB)
DSPF document front
surface magnification ratio
adjustment (Sub scan)
surface magnification ratio
adjustment (Sub scan)
1 - 99
50
E
SPFB(MAIN)
DSPF document back
surface magnification ratio
adjustment (Main scan)
surface magnification ratio
adjustment (Main scan)
1 - 99
50
SPF (MAIN)
Main scanning direction image magnification ratio
(Front surface)
(Front surface)
SPFB (MAIN) Main scanning direction image magnification ratio
(Back surface)
A4 size
10mm
10mm
Paper pass direction
Item
Display
Content
Setting
range
Default
value
A
CCD(MAIN)
SCAN main scanning
magnification ratio
adjustment (CCD)
magnification ratio
adjustment (CCD)
1 - 99
50
B
CCD(SUB)
SCAN sub scanning
magnification ratio
adjustment (CCD)
magnification ratio
adjustment (CCD)
1 - 99
50
C
SPF(MAIN)
DSPF document front
surface magnification ratio
adjustment (Main scan)
surface magnification ratio
adjustment (Main scan)
1 - 99
50
D
SPF(SUB)
DSPF document front
surface magnification ratio
adjustment (Sub scan)
surface magnification ratio
adjustment (Sub scan)
1 - 99
50
E
SPFB(MAIN)
DSPF document back
surface magnification ratio
adjustment (Main scan)
surface magnification ratio
adjustment (Main scan)
1 - 99
50
SPF (SUB)
Sub scanning direction image magnification ratio
(Front surface/Back surface)
(Front surface/Back surface)
original
copy
10
50
100
150
200
10
50
100
150
200
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2.
MX-M753N ADJUSTMENTS AND SETTINGS 5 – 50
7)
Enter an image magnification ratio adjustment value with 10-
key, and press [OK] key.
When the adjustment value is increased, the image magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the image magni-
fication ratio is changed by 0.01%.
key, and press [OK] key.
When the adjustment value is increased, the image magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the image magni-
fication ratio is changed by 0.01%.
NOTE: When [CLOSE] key is pressed in this simulation mode, the
machine goes into the normal operation mode. Under this
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
ADJ 20
Scan image off-center
adjustment
(Manual adjustment)
adjustment
(Manual adjustment)
This manual adjustment is used when the automatic adjustment of
SIM 50-28 cannot obtain a satisfactory result.
SIM 50-28 cannot obtain a satisfactory result.
20-A
Scan image off-center adjustment
(Document table mode)
(Document table mode)
This adjustment is needed in the following situations:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
1)
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
1)
Make a copy of the adjustment chart (made by yourself) in the
adjustment mode (document table).
adjustment mode (document table).
2)
Check the copy image center position.
If A' - B' =
If A' - B' =
1.0mm, the adjustment is not required.
If the above condition is not satisfied, perform the following
procedures.
procedures.
3)
Enter the SIM 50-12 mode.
4)
Select the adjustment mode OC with the scroll key.
5)
Enter the adjustment value with 10-key, and press [OK] key.
The entered value is set.
When the set value is increased, the main scanning print posi-
tion is shifted to the front side by 0.1mm.
The entered value is set.
When the set value is increased, the main scanning print posi-
tion is shifted to the front side by 0.1mm.
6)
Press [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
copy mode and make a copy.
20-B
Scan image off-center adjustment
(DSPF mode)
(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) section is replaced.
* When U2 trouble occurs.
* When the DSPF section is disassembled.
* When the DSPF unit is replaced.
* 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) section is replaced.
* When U2 trouble occurs.
* When the DSPF section is disassembled.
* When the DSPF unit is replaced.
NOTE: To execute this adjustment, it is required that the Scan
image off-center adjustment (Document table mode) must
have been properly adjusted.
have been properly adjusted.
a. Adjustment procedures
1)
Prepare the adjustment chart.
Draw a line at the center of the front surface and the back sur-
face of A4 (11" x 8.5") paper in parallel with the paper transport
direction.
Draw a line at the center of the front surface and the back sur-
face of A4 (11" x 8.5") paper in parallel with the paper transport
direction.
B
A = B
A
B'
A' - B' =
1.0mm
A'
(100%)
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2.
Paper transport direction
Front surface
Back surface
Draw a line at the center of the
front surface and the back surface
of paper in parallel with the paper
transport direction.
MX-M753N ADJUSTMENTS AND SETTINGS 5 – 51
2)
Set the adjustment chart to the DSPF.
3)
Make a duplex copy in the normal magnification ratio from the
manual paper feed tray, and check the image position on the
front surface and the back surface of the copy paper.
manual paper feed tray, and check the image position on the
front surface and the back surface of the copy paper.
If the difference is within the range of 0
2.7mmm there is no
need to perform the adjustment.
If the adjustment is required, perform the following procedures.
If the adjustment is required, perform the following procedures.
4)
Enter the SIM 50-12 or 50-6 mode.
SIM50-12
A - C: When the adjustment value is increased, the image
position is shifted to the rear frame side.
1step = 0.1mm
position is shifted to the rear frame side.
1step = 0.1mm
SIM50-6
* 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
* The DSPF rear edge image loss setting is provided for
countermeasures against the case when shades are
produced.
produced.
5)
Select an adjustment mode with the scroll key.
(SIM50-12)
(SIM50-6)
6)
Enter an adjustment value with 10-key, and press [OK] key.
(Change for change in the adjustment value: 0.1mm/step)
(When the adjustment value is increased, the print image is
shifted to the rear.)
(Change for change in the adjustment value: 0.1mm/step)
(When the adjustment value is increased, the print image is
shifted to the rear.)
NOTE: When [CLOSE] key is pressed in this simulation mode, the
machine goes into the normal operation mode. Under this
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.
Item
Display
Content
Setting
range
Default
value
A
OC
Document table image off-
center adjustment
center adjustment
1 - 99
50
B
SPF(SIDE1)
DSPF front surface image
off-center adjustment
off-center adjustment
1 - 99
50
C
SPF(SIDE2)
DSPF back surface image
off-center adjustment
off-center adjustment
1 - 99
50
original
copy
a
b
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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
(CIS)
document scan
position adjustment
(CIS)
1 - 99
50
C
Image
loss
amount
setting
SIDE1
loss
amount
setting
SIDE1
LEAD_EDGE
(SIDE1)
(SIDE1)
Front surface lead
edge image loss
amount setting
edge image loss
amount setting
0 - 99
20
D
FRONT_REAR
(SIDE1)
(SIDE1)
Front surface side
image loss amount
setting
image loss amount
setting
0 - 99
20
E
TRAIL_EDGE
(SIDE1)
(SIDE1)
Front surface rear
edge image loss
amount setting
edge image loss
amount setting
0 - 99
30
F
LEAD_EDGE
(SIDE2)
(SIDE2)
Back surface lead
edge image loss
amount setting
edge image loss
amount setting
0 - 99
30
G
Image
loss
amount
setting
SIDE2
loss
amount
setting
SIDE2
FRONT_REAR
(SIDE2)
(SIDE2)
Back surface side
image loss amount
setting
image loss amount
setting
0 - 99
20
H
TRAIL_EDGE
(SIDE2)
(SIDE2)
Back surface rear
edge image loss
amount setting
edge 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 image
magnification ratio
adjustment (sub
scanning)
magnification ratio
adjustment (sub
scanning)
1 - 99
50
SPF(SIDE1)
Front surface mode
SPF(SIDE2)
Back surface mode
OFFSET SPF1
Front surface mode
OFFSET SPF2
Back surface mode
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