Sharp MX-3050N / MX-3060N / MX-3070N / MX-3550N / MX-3560N / MX-3570N / MX-4050N / MX-4060N / MX-4070N (serv.man5) Service Manual ▷ View online
MX-4070N ADJUSTMENTS AND SETTINGS 5 – 15
Check Method 2
Check that the squareness of the main scanning direction print
line for the longitudinal direction of paper is within 1.0 mm.
Check that the squareness of the main scanning direction print
line for the longitudinal direction of paper is within 1.0 mm.
If the copy image is not in the above state, perform the proce-
dure 3).
dure 3).
3) Open the RSPF unit, and loosen the fixing screw of the hinge.
4) Slide the RSPF unit in the arrow direction to make the skew
adjustment.
5) Make a copy again and measure a and b on the copied test
chart. Repeat procedures 2) to 5) until the condition (a - b = ± 1
mm or less) is satisfied.
mm or less) is satisfied.
7-B
DSPF parallelism adjustment
This adjustment must be performed in the following cases:
• The DSPF section has been disassembled.
• The DSPF unit has been replaced
• Paper jam occurs at DSPF
• Skew occurs while feeding paper from DSPF
• Skew appears on the image scanned from the DSPF
• The DSPF section has been disassembled.
• The DSPF unit has been replaced
• Paper jam occurs at DSPF
• Skew occurs while feeding paper from DSPF
• Skew appears on the image scanned from the DSPF
1)
Close the DSPF unit and check the clearance between the
projections in the front side and the rear side and the SPF
glass holding resin surface.
projections in the front side and the rear side and the SPF
glass holding resin surface.
2)
Visually check to insure that the clearance A is 1 mm or less
and the clearance B is 0 mm (in contact).
If the above requirement is not met, do step 3).
and the clearance B is 0 mm (in contact).
If the above requirement is not met, do step 3).
3)
Turn the height adjustment screw to adjust the DSPF front/rear
frame horizontal level.
frame horizontal level.
When the front frame side is higher (There is a clearance of 1
mm or more in B):
Turn the height adjustment screw R of the DSPF rear frame
clockwise.
When the rear frame side is higher (There is a clearance of 1
mm or more in A):
Turn the height adjustment screw L of the DSPF rear frame
counterclockwise.
mm or more in B):
Turn the height adjustment screw R of the DSPF rear frame
clockwise.
When the rear frame side is higher (There is a clearance of 1
mm or more in A):
Turn the height adjustment screw L of the DSPF rear frame
counterclockwise.
A
1.0
A
B
1mm
0mm
L
R
MX-4070N ADJUSTMENTS AND SETTINGS 5 – 16
Repeat steps 2) to 3) until an acceptable result is obtained.
4) After adjustments of A and B, check to insure that the projec-
tion on the front right side is in contact with the glass surface of
the main unit.
the main unit.
7-C
DSPF skew adjustment
(Front surface mode)
(Front surface mode)
This adjustment must be performed in the following cases:
• The DSPF section has been disassembled.
• When replacing the DSPF unit.
• The DSPF unit generates skewed scanned images.
1) Make an adjustment chart.
• The DSPF section has been disassembled.
• When replacing the DSPF unit.
• The DSPF unit generates skewed scanned images.
1) Make an adjustment chart.
Print the self print pattern (grid pattern) of SIM64-2 in the
duplex print mode.
SIM64-2 set value
A=1, B=1, C=254, D=255
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A' and 'B' to the
front and rear side of leading edge on front and back side of
the paper.
duplex print mode.
SIM64-2 set value
A=1, B=1, C=254, D=255
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A' and 'B' to the
front and rear side of leading edge on front and back side of
the paper.
2) Copy the adjustment chart (created in step 1) to A3 (11" x 17")
paper in DSPF duplex mode, and then check the image for
skews (Set in the DSPF feed tray so that the mark on the
adjustment chart is at the edge).
•Check with one of the following methods.
skews (Set in the DSPF feed tray so that the mark on the
adjustment chart is at the edge).
•Check with one of the following methods.
[Check Method 1]
[Check Method 2]
Check that the squareness of the main scanning direction print
line for the longitudinal direction of paper is within 1.0 mm.
Check that the squareness of the main scanning direction print
line for the longitudinal direction of paper is within 1.0 mm.
If the front surface copy image is as shown above and the
back surface copy is not as shown above, go to the step 3) of
"ADJ 7D DSPF skew adjustment (Back surface mode)."
If the above requirement is not met for the paper's front side,
then do step 3).
back surface copy is not as shown above, go to the step 3) of
"ADJ 7D DSPF skew adjustment (Back surface mode)."
If the above requirement is not met for the paper's front side,
then do step 3).
3)
Loosen the hinge screws and lower the two attachments.
A
B
Paper feed direction
A
B
a
b
C
D
c
d
(Front side)
Make sure that the output satisfies the condition:
_DE_PP
_DE_PP
(Back side)
Make sure that the output satisfies the condition:
_FG_PP
_FG_PP
A
1.0
Ĭ
ĭ
MX-4070N ADJUSTMENTS AND SETTINGS 5 – 17
4) Open the DSPF and loosen the screw.
5) Adjust by turning the DSPF skew adjusting screw on the right
side of the DSPF rear frame.
[When the main scanning direction print line is shifted to the
left]
If a < b, then turn counterclockwise the DSPF skew adjusting
screw.
[When the main scanning direction print line is shifted to the
right]
If a > b, then turn clockwise the DSPF skew adjusting screw.
Repeat steps 2) to 5) until an acceptable result is obtained.
left]
If a < b, then turn counterclockwise the DSPF skew adjusting
screw.
[When the main scanning direction print line is shifted to the
right]
If a > b, then turn clockwise the DSPF skew adjusting screw.
Repeat steps 2) to 5) until an acceptable result is obtained.
7-D
DSPF skew adjustment
(Back surface mode)
(Back surface mode)
This adjustment must be performed in the following cases:
• DSPF section has been disassembled.
• The DSPF unit has been replaced.
• The DSPF unit generates skewed scanned images.
1) Make an adjustment chart.
• DSPF section has been disassembled.
• The DSPF unit has been replaced.
• The DSPF unit generates skewed scanned images.
1) Make an adjustment chart.
Print the self print pattern (grid pattern) of SIM64-2 in the
duplex print mode.
SIM64-2 set value
A=1, B=1, C=254, D=255
duplex print mode.
SIM64-2 set value
A=1, B=1, C=254, D=255
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A' and 'B' to the
front and rear side of leading edge on front and back side of
the paper.
the paper edges, and apply position marks 'A' and 'B' to the
front and rear side of leading edge on front and back side of
the paper.
2)
Copy the adjustment chart (created in step 1) to A3 (11" x 17")
paper in DSPF duplex mode, and then check the image for
skews (Set in the DSPF feed tray so that the mark on the
adjustment chart is at the edge).
Check with one of the following methods.
paper in DSPF duplex mode, and then check the image for
skews (Set in the DSPF feed tray so that the mark on the
adjustment chart is at the edge).
Check with one of the following methods.
[Check Method 1]
[Check Method 2]
Check that the squareness of the main scanning direction print
line for the longitudinal direction of paper is within 1.0 mm.
Check that the squareness of the main scanning direction print
line for the longitudinal direction of paper is within 1.0 mm.
If the back surface copy image is as shown above and the
front surface copy is not as shown above, go to the step 3) of
"ADJ 7C DSPF skew adjustment (Front surface mode)."
front surface copy is not as shown above, go to the step 3) of
"ADJ 7C DSPF skew adjustment (Front surface mode)."
A
B
Paper feed direction
A
B
a
b
C
D
c
d
(Front side)
Make sure that the output satisfies the condition:
_DE_PP
_DE_PP
(Back side)
Make sure that the output satisfies the condition:
_FG_PP
_FG_PP
A
1.0
MX-4070N ADJUSTMENTS AND SETTINGS 5 – 18
If the back surface copy is not as shown above, perform the
procedures of step 3).
procedures of step 3).
3) Open the upper door, and remove the adjustment cover.
4) Turn the DSPF skew adjustment screw on the CCD unit to
adjust.
[When the main scanning direction print line is shifted to the
left]
If c < d, turn the DSPF skew adjustment screw A counterclock-
wise, or turn the adjustment screw B clockwise.
[When the main scanning direction print line is shifted to the
right]
If c > d, turn the DSPF skew adjustment screw A clockwise, or
turn the adjustment screw B counterclockwise.
* The adjustment screws A and B must be turned in proper bal-
ance. For example, if the trouble is not removed by turning the
adjustment screw A 180 degrees clockwise, do not turn the
adjustment screw A furthermore, but turn the adjustment
screw B 180 degrees counterclockwise.
Repeat steps 2) to 4) until an acceptable result is obtained.
left]
If c < d, turn the DSPF skew adjustment screw A counterclock-
wise, or turn the adjustment screw B clockwise.
[When the main scanning direction print line is shifted to the
right]
If c > d, turn the DSPF skew adjustment screw A clockwise, or
turn the adjustment screw B counterclockwise.
* The adjustment screws A and B must be turned in proper bal-
ance. For example, if the trouble is not removed by turning the
adjustment screw A 180 degrees clockwise, do not turn the
adjustment screw A furthermore, but turn the adjustment
screw B 180 degrees counterclockwise.
Repeat steps 2) to 4) until an acceptable result is obtained.
ADJ 8
Scan image focus adjustment
8-A
Image focus adjustment (Document table
mode/DSPF/RSPF front surface mode)
mode/DSPF/RSPF front surface mode)
This adjustment must be performed in the following cases:
• The CCD unit has been removed from the machine.
• The CCD unit has been replaced.
• When the copy image focus is not properly adjusted.
• The CCD unit has been removed from the machine.
• The CCD unit has been replaced.
• When the copy image focus is not properly adjusted.
• When the copy magnification ratio in the copy image main scan-
ning direction is not properly adjusted.
• U2 trouble has occurred.
1)
1)
Enter the SIM 48-1 mode.
2)
Set the adjustment item CCD (MAIN) to 50 (default value).
Select the adjustment item with the scroll key, and enter the
adjustment value with 10-key and press [OK] key.
Select the adjustment item with the scroll key, and enter the
adjustment value with 10-key and press [OK] key.
3)
Place a scale on the original table as illustrated below.
4)
Make a normal copy on A4 paper.
5)
Compare the copied image of the scale and the actual scale
length in terms of length.
length in terms of length.
6)
Obtain the copy magnification ratio correction ratio in the main
scanning direction from the following formula.
Main scanning direction copy magnification ratio correction
ratio = (Original size - Copy image size) / Original size x 100%
(Example)
Compare the scale of 10 mm with the scale of 10 mm on the
copy image.
Main scanning direction copy magnification ratio correction
ratio = (100 - 99) / 100 x 100 = 1
scanning direction from the following formula.
Main scanning direction copy magnification ratio correction
ratio = (Original size - Copy image size) / Original size x 100%
(Example)
Compare the scale of 10 mm with the scale of 10 mm on the
copy image.
Main scanning direction copy magnification ratio correction
ratio = (100 - 99) / 100 x 100 = 1
If the copy magnification ratio is not satisfactory, perform the
following procedures.
following procedures.
7)
Remove the document table glass.
8)
Remove the dark box cover.
10
20
90
100
110
10
20
90
100
110
1.0mm
100 mm scale
(Original)
(Original)
Copy image
(1mm (1%)
shorter than
the original)
(1mm (1%)
shorter than
the original)
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