Sharp MX-2640N / MX-2640NR / MX-2640FN / MX-3140N / MX-3140NR / MX-3140FN / MX-3640N / MX-3640NR / MX-3640FN (serv.man36) Service Manual ▷ View online
MX-3640N ADJUSTMENTS AND SETTINGS 5 – 78
16-C
Scan image magnification ratio adjustment
(main scanning direction)
(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 U2 trouble occurs.
* When the copy magnification ratio of the RSPF mo de 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 RSPF mo de copy
image in the main scanning direction is not proper.
* When the RSPF is disassembled.
a. Adjustment procedures
1) Place the duplex adjust ment chart shown below on the docu-
a. Adjustment procedures
1) Place the duplex adjust ment chart shown below on the docu-
ment tray of the RSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put ma rks on both sides and
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put ma rks 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 co py paper and the original
3) Measure the images on the co py 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 = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
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-
If it is not within the specified range, perform the following pro-
cedures.
5) Enter the SIM 48-1 mode.
RSPF
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%.
8) Make a normal copy and obtain the copy magnification ratio.
Repeat the procedures of 1) - 8) until a satisfactor y result is
Repeat the procedures of 1) - 8) until a satisfactor y result is
obtained.
16-D
Scan image magnification ratio adjustment
(sub scanning direction) (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 U2 trouble occurs.
* When the copy magnification ra tio of the R SPF 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 ra tio of the R SPF mode copy
image in the sub scanning direction is not proper.
* When the RSPF is disassembled.
1) Place the duplex adjustment chart shown below on the docu -
1) Place the duplex adjustment chart shown below on the docu -
ment tray of the RSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
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.
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.
Item
Display
Content
Setting
range
Default
value
A
CCD(MAIN)
SCAN main scanning
magnification ratio
adjustment (CCD)
1 - 99
50
B
CCD(SUB)
SCAN sub scanning
magnification ratio
adjustment (CCD)
1 - 99
50
C
SPF(MAIN)
RSPF document front
surface magnification ratio
adjustment (Main scan)
1 - 99
50
D
SPF(SUB)
RSPF document front
surface magnification ratio
adjustment (Sub scan)
1 - 99
50
E
SPFB(MAIN)
RSPF document back
surface magnification ratio
adjustment (Main scan)
1 - 99
50
F
SPFB(SUB)
RSPF document back
surface magnification ratio
adjustment (Sub scan)
1 - 99
50
SPF (MAIN)
Main scanning direction image magnification ratio
(Front surface)
SPFB (MAIN) Main scanning direction image magnification ratio
(Back surface)
A4 size
10mm
10mm
Paper pass direction
MX-3640N ADJUSTMENTS AND SETTINGS 5 – 79
2) Make a duplex copy at the normal ratio on A4 paper.
3) Measure the images on the co py paper and the original
3) Measure the images on the co py 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 = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
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-
If it is not within the specified range, perform the following pro-
cedures.
5) Enter the SIM 48-1 mode.
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-
When the adjustment value is increased, the image magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the image magni-
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 satisfactor y result is
Repeat the procedures of 1) - 8) until a satisfactor y result is
obtained.
ADJ 17
Scan image off-center
adjustment
(Manual adjustment)
Normally if the adjustment is executed by ADJ 4 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual ad justment is executed when a satis-
In other words, this manual ad justment is executed when a satis-
factory result is not obtained from the automatic adjustment (ADJ
4).
17-A
Scan image off-center 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 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 the above condition is not satisfied, p erform the following
procedures.
Item
Display
Content
Setting
range
Default
value
A
CCD(MAIN)
SCAN main scanning
magnification ratio
adjustment (CCD)
1 - 99
50
B
CCD(SUB)
SCAN sub scanning
magnification ratio
adjustment (CCD)
1 - 99
50
C
SPF(MAIN)
RSPF document front
surface magnification ratio
adjustment (Main scan)
1 - 99
50
D
SPF(SUB)
RSPF document front
surface magnification ratio
adjustment (Sub scan)
1 - 99
50
E
SPFB(MAIN)
RSPF document back
surface magnification ratio
adjustment (Main scan)
1 - 99
50
F
SPFB(SUB)
RSPF document back
surface magnification ratio
adjustment (Sub scan)
1 - 99
50
SPF (SUB)
Sub scanning direction image magnification ratio
(Front surface)
SPFB (SUB)
Sub scanning direction image magnification ratio
(Back surface)
original
copy
10
50
100
150
200
10
50
100
150
200
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2.
B
A = B
A
B'
A' - B' =
1.0mm
A'
(100%)
MX-3640N ADJUSTMENTS AND SETTINGS 5 – 80
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.
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-
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-
Repeat the procedures of 1) - 6) until the above condition is satis-
fied.
17-B
Scan image off-center 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) section is replaced.
* When U2 trouble occurs.
* When the RSPF section is disassembled.
* When the RSPF 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 RSPF section is disassembled.
* When the RSPF unit is replaced.
To execute this adjustment, it is required that the ADJ 17A Scan
image off-center adjustment (Document t able mode) must have
been properly adjusted.
1) Prepare the adjustment chart.
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.
2) Set the adjustment chart to the RSPF.
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.
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
1step = 0.1mm
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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.
front surface and the back surface
of paper in parallel with the paper
transport direction.
Item
Display
Content
Setting
range
Default
value
A
OC
Document table image off-
center adjustment
1 - 99
50
B
SPF(SIDE1)
SPF front surface image off-
center adjustment
1 - 99
50
C
SPF(SIDE2)
SPF back surface image off-
center adjustment
1 - 99
50
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2.
(SIM50-12)
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2.
(SIM50-6)
MX-3640N ADJUSTMENTS AND SETTINGS 5 – 81
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 SPF r ear edge image loss setting is provided for
* The SPF r ear edge image loss setting is provided for
countermeasures against the ca se when shades are
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 a djustment value is in creased, the print image is
(When the a djustment value is in creased, the print image is
shifted to the rear.)
Repeat the pr ocedures of 2) - 6) until a sat isfactory result is
obtained.
ADJ 18
Copy image position and image
loss adjustment
(Manual adjustment)
Normally if the adjustment is executed by ADJ 4 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual ad justment is executed when a satis-
In other words, this manual ad justment is executed when a satis-
factory result is not obtained from the automatic adjustment (ADJ
4).
18-A
Copy image position, image loss, and void
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.
Before executing this adjustment, be sure to confirm th at the ADJ
4/ADJ 5 Print engine image skew, image position, image magnifica-
tion ratio, void area adjustments has been completed normally.
1) Place a sca le on the document t able as shown in the figure
1) Place a sca le on the document t able as shown in the figure
below.
Place a scale so that it is in parallel with the scanning direction
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
Place white paper on the document table so that the scale lead
edge can be seen.
Item/Display
Content
Setting
range
Default
value
A SIDE1
Front surface
document scan
position adjustment
(CCD)
1 - 99
50
B SIDE2
Back surface
document scan
position adjustment
(CCD)
1 - 99
50
C Image
loss
amount
setting
SIDE1
LEAD_EDGE
(SIDE1)
Front surface lead
edge image loss
amount setting
0 - 99
20
D
FRONT_REAR
(SIDE1)
Front surface side
image loss amount
setting
0 - 99
20
E
TRAIL_EDGE
(SIDE1)
Front surface rear
edge image loss
amount setting
0 - 99
40
F
Image
loss
amount
setting
SIDE2
LEAD_EDGE
(SIDE2)
Back surface lead
edge image loss
amount setting
0 - 99
20
G
FRONT_REAR
(SIDE2)
Back surface side
image loss amount
setting
0 - 99
20
H
TRAIL_EDGE
(SIDE2)
Back surface rear
edge image loss
amount setting
0 - 99
40
I
OFFSET_SPF1
RSPF front surface
document off-center
adjustment
1 - 99
50
J
OFFSET_SPF2
RSPF back surface
document off-center
adjustment
1 - 99
50
K SCAN_SPEED_SPF1
RSPF document
front surface
magnification ratio
adjustment (Sub
scan)
1 - 99
50
L
SCAN_SPEED_SPF2
RSPF document
back surface
magnification ratio
adjustment (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
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