Sharp MX-6500N / MX-7500N (serv.man19) Service Manual ▷ View online
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 85
2) Make a duplex copy at the normal ratio on A4 paper.
3) Measure the images on the copy paper and the original
3) Measure the images on the copy paper and the original
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 +/- 0.8%), there is no need to perform the adjustment.
If it is not within the specified range, perform the following pro-
cedures.
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.
5) Enter the SIM 48-1 mode.
DSPF
6) Select an adjustment item of SPF (MAIN)/SPFB (MAIN) with
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 magnification 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 magnification ratio is changed by 0.02%.
8)
Make a normal copy and obtain the copy magnification ratio.
Repeat the procedures of 1) - 8) until a satisfactory result is
obtained.
obtained.
16-D
Scan image magnification ratio adjustment
(sub scanning direction)
(Manual adjustment) (DSPF mode)
(sub scanning direction)
(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 U2 trouble occurs.
* When the copy magnification ratio of the DSPF mode copy
* 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 of the DSPF mode copy
image in the sub scanning direction is not proper.
* When the DSPF is disassembled.
1)
1)
Place the duplex adjustment chart shown below on the DSPF
document tray.
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.
document tray.
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 +/- 0.8%), there is no need to perform the adjustment.
If it is not within the specified range, perform the following pro-
cedures.
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.
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)
magnification ratio
adjustment (Main scan)
1 - 99
50
D
SPF(SUB)
DSPF document front surface
magnification ratio
adjustment (Sub scan)
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)
original
10
50
100
150
200
250
copy
10
50
100
150
200
250
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10mm
10mm
Paper pass direction
original
copy
10
50
100
150
200
10
50
100
150
200
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 86
5) Enter the SIM 48-1 mode.
6) Select an adjustment item with the scroll key.
6) Select an adjustment item with the scroll key.
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 0.1%.
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 0.1%.
8) Make a normal copy and obtain the copy magnification ratio.
Repeat the procedures of 1) - 8) until a satisfactory result is
obtained.
Repeat the procedures of 1) - 8) until a satisfactory result is
obtained.
ADJ 17
Scan image off-center
adjustment
(Manual adjustment)
adjustment
(Manual adjustment)
NOTE:
Normally if the adjustment is executed by ADJ3 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment
(ADJ3).
Normally if the adjustment is executed by ADJ3 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment
(ADJ3).
17-A
Scan image off-center adjustment (Manual
adjustment) (Document table mode)
adjustment) (Document table mode)
This adjustment must be performed in the following cases:
* 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
* 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).
2)
Check the copy image center position.
If A - B = +/- 1.0mm, the adjustment is not required.
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)
Go to the copy mode, and make a copy.
Repeat the procedures of 1) - 6) until the above condition is satis-
fied.
fied.
17-B
Scan image off-center adjustment
(Manual adjustment) (DSPF mode)
(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) 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.
CAUTION: To execute this adjustment, it is required that the
ADJ17A Scan image off-center adjustment (Document
table mode) must have been properly adjusted.
table mode) must have been properly adjusted.
SPF (SUB)
Sub scanning direction image magnification ratio
(Front surface)
(Front surface)
SPFB (SUB)
Sub scanning direction image magnification ratio
(Back surface)
(Back surface)
B
A = B
A
B'
A' - B' = 1.0mm
A'
(100%)
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MX-7500N ADJUSTMENTS AND SETTINGS 5 – 87
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.
face of A4 (11" x 8.5") paper in parallel with the paper transport
direction.
2) Set the adjustment chart to the DSPF.
3) Make a duplex copy in the normal magnification ratio from the
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.
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.
need to perform the adjustment.
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 coun-
* The DSPF rear edge image loss setting is provided for coun-
termeasures against the case when shades are produced.
5)
Select an adjustment mode with the scroll key.
(SIM50-12)
(SIM50-6)
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.
front surface and the back surface
of paper in parallel with the paper
transport direction.
original
copy
a
b
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(SIM50-6)
Item
Display
Content
Setting
range
Default
value
A
OC
Document table image off-
center adjustment
center adjustment
1 - 99
50
B
SPF(SIDE1)
SPF front surface image off-
center adjustment
center adjustment
1 - 99
50
C
SPF(SIDE2)
SPF back surface image off-
center adjustment
center adjustment
1 - 99
50
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
SPF(SIDE1)
Front surface mode
SPF(SIDE2)
Back surface mode
OFFSET SPF1
Front surface mode
OFFSET SPF2
Back surface mode
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 88
6) Enter an adjustment value with 10-key, and press [OK] key.
(Change for change in the adjustment value: 0.1mm/step)
(In the case of SIM50-6: When the adjustment value is
increased, the print image is shifted to the rear.)
(In the case of SIM50-6: When the adjustment value is
increased, the print image is shifted to the rear.)
Repeat the procedures of 2) - 6) until a satisfactory result is
obtained.
obtained.
ADJ 18
Copy image position and image
loss adjustment
(Manual adjustment)
loss adjustment
(Manual adjustment)
NOTE:
Normally if the adjustment is executed by ADJ3 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment
(ADJ3).
Normally if the adjustment is executed by ADJ3 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment
(ADJ3).
18-A
Copy image position, image loss, and void
area adjustment (Manual adjustment)
(Document table mode)
area adjustment (Manual adjustment)
(Document table mode)
This adjustment must be performed in the following cases:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the LSU is replaced or removed.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* The scanner control PWB has been replaced.
* The EEPROM on the scanner control PWB has been replaced.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the LSU is replaced or removed.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* The scanner control PWB has been replaced.
* The EEPROM on the scanner control PWB has been replaced.
NOTE: Before executing this adjustment, be sure to confirm that
the ADJ3/ADJ4 Print engine image skew, image position,
image magnification ratio, void area adjustments has been
completed normally.
image magnification ratio, void area adjustments has been
completed normally.
1) Place a scale on the document table as shown in the figure
below.
Place a scale so that it is in parallel with the scanning direction
and that its lead edge is in contact with the document guide
plate.
Place white paper on the document table so that the scale lead
edge can be seen.
Place a scale so that it is in parallel with the scanning direction
and that its lead edge is in contact with the document guide
plate.
Place white paper on the document table so that the scale lead
edge can be seen.
2)
Enter the SIM 50-1 mode.
3)
Set RRCA, LEAD, and SIDE to the default values.
Item/Display
Content
Setting
range
Default
value
A
Lead edge
adjustment
value
adjustment
value
RRCA
Document lead
edge reference
position (OC)
edge reference
position (OC)
0 - 99
50
B
Image loss
area setting
value
area setting
value
LEAD
Lead edge image
loss area setting
loss area setting
0 - 99
40
C
SIDE
Side image loss
area setting
area setting
0 - 99
20
D
Void area
adjustment
adjustment
DENA
Print lead edge
adjustment
adjustment
1 - 99
40
E
DENB
Sub scanning
direction print
range adjustment
direction print
range adjustment
1 - 99
30
F
FRONT/
REAR
REAR
FRONT/REAR void
area adjustment
area adjustment
1 - 99
20
G
Off-center
adjustment
adjustment
OFFSET_
OC
OC
OC document off-
center adjustment
center adjustment
1 - 99
50
H
Magnification
ratio
correction
ratio
correction
SCAN_
SPEED_
OC
SPEED_
OC
SCAN sub
scanning
magnification ratio
adjustment (CCD)
scanning
magnification ratio
adjustment (CCD)
1 - 99
50
I
Sub
scanning
direction print
area
correction
value
scanning
direction print
area
correction
value
DENB-
MFT
MFT
Manual feed
correction value
correction value
1 - 99
50
J
DENB-
CS1
CS1
Tray 1 correction
value
value
1 - 99
50
K
DENB-
CS2
CS2
Tray 2 correction
value
value
1 - 99
50
L
DENB-
CS3
CS3
Tray 3 correction
value
value
1 - 99
50
M
DENB-
CS4
CS4
Tray 4 correction
value
value
1 - 99
50
N
DENB-LC
LCC/LCT/LCT
manual paper feed
correction value
manual paper feed
correction value
1 - 99
50
O
DENB-
ADU
ADU
ADU correction
value
value
1 - 99
55
P
DENB-HV
Heavy paper
correction value
correction value
1 - 99
50
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OK
10-key
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