Sharp MX-4100N / MX-4101N / MX-5000N / MX-5001N (serv.man13) Service Manual ▷ View online
MX-4101N ADJUSTMENTS 5 – 36
13-C
DSPF levelness adjustment
This adjustment is needed in the following situations:
* The DSPF section has been disassembled.
* The DSPF unit has been replaced.
1)
* The DSPF section has been disassembled.
* The DSPF unit has been replaced.
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 1mm or less
and the clearance B is 0mm (in contact).
and the clearance B is 0mm (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 in B):
Turn the height adjustment screw R of the DSPF rear frame
clockwise.
When the rear frame side is higher (clearance A is more than
1mm): Turn the height adjustment screw L of the DSPF rear
frame counterclockwise.
Repeat steps 2 to 3 until an acceptable result is obtained.
Turn the height adjustment screw R of the DSPF rear frame
clockwise.
When the rear frame side is higher (clearance A is more than
1mm): Turn the height adjustment screw L of the DSPF rear
frame counterclockwise.
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.
tion on the front right side is in contact with the glass surface of
the main unit.
13-D
DSPF skew adjustment
(Front surface mode)
This adjustment is needed in the following situations:
* The DSPF section has been disassembled.
* When replacing the DSPF unit.
* The DSPF unit generates skewed scanned images.
1)
* The DSPF section has been disassembled.
* When replacing the DSPF unit.
* The DSPF unit generates skewed scanned images.
1)
Create an adjustment chart by printing in duplex mode the self-
print pattern 1 (grid pattern) specified in Simulation 64-1.
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A', 'B', 'C' and 'D' to
the leading and trailing edges of the paper for both front and
back sides of the paper.
print pattern 1 (grid pattern) specified in Simulation 64-1.
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A', 'B', 'C' and 'D' to
the leading and trailing edges of the paper for both front and
back sides 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]
A
B
0mm
1mm
R
L
A
B
Paper pass direction
A
B
a
b
C
D
c
d
(Front side)
Make sure that the output satisfies the condition: |a-b| ± 1 mm
Make sure that the output satisfies the condition: |a-b| ± 1 mm
(Back side)
Make sure that the output satisfies the condition: |c-d| ± 1 mm
Make sure that the output satisfies the condition: |c-d| ± 1 mm
MX-4101N ADJUSTMENTS 5 – 37
[Check Method 2]
Check that the squareness of the main scanning direction
print line for the longitudinal direction of paper is within
1.0mm.
Check that the squareness of the main scanning direction
print line for the longitudinal direction of paper is within
1.0mm.
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 "3. 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 "3. 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.
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.
side of the DSPF rear frame.
[When the main scanning direction print line is shifted to the
left]
left]
If a < b, then turn counterclockwise the DSPF skew
adjusting screw.
adjusting screw.
[When the main scanning direction print line is shifted to the
right]
right]
If a > b, then turn clockwise the DSPF skew adjusting screw.
Repeat steps 2 to 5 until an acceptable result is obtained.
(Skew adjustment (back surface mode))
This adjustment is needed in the following situations:
* The DSPF section has been disassembled.
* When replacing the DSPF unit.
* The DSPF unit generates skewed scanned images.
1)
* The DSPF section has been disassembled.
* When replacing the DSPF unit.
* The DSPF unit generates skewed scanned images.
1)
Create an adjustment chart by printing in duplex mode the self-
print pattern 1 (grid pattern) specified in Simulation 64-1.
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A', 'B', 'C' and 'D' to
the leading and trailing edges of the paper for both front and
back sides of the paper.
print pattern 1 (grid pattern) specified in Simulation 64-1.
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A', 'B', 'C' and 'D' to
the leading and trailing edges of the paper for both front and
back sides 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]
A
0 - 1.0mm
1
2
A
B
Paper pass direction
A
B
a
b
C
D
c
d
(Front side)
Make sure that the output satisfies the condition: |a-b| ± 1 mm
Make sure that the output satisfies the condition: |a-b| ± 1 mm
(Back side)
Make sure that the output satisfies the condition: |c-d| ± 1 mm
Make sure that the output satisfies the condition: |c-d| ± 1 mm
MX-4101N ADJUSTMENTS 5 – 38
[Check Method 2]
Check that the squareness of the main scanning direction
print line for the longitudinal direction of paper is within
1.0mm.
Check that the squareness of the main scanning direction
print line for the longitudinal direction of paper is within
1.0mm.
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 "2. Skew adjustment (Front surface mode)."
If the back surface copy is not as shown above, perform the
procedures of step 3) or later.
front surface copy is not as shown above, go to the step 3)
of "2. Skew adjustment (Front surface mode)."
If the back surface copy is not as shown above, perform the
procedures of step 3) or later.
3)
Open the upper door, and remove the adjustment cover.
4)
Turn the DSPF skew adjustment screw on the CCD unit to
adjust.
adjust.
* When the adjustment screw is turned 180 degrees, a change
of about 0.5mm is made.
[When the main scanning direction print line is shifted to the
left]
left]
If c < d, turn the DSPF skew adjustment screw A
counterclockwise, or turn the adjustment screw B clockwise.
counterclockwise, or turn the adjustment screw B clockwise.
[When the main scanning direction print line is shifted to the
right]
right]
If c > d, turn the DSPF skew adjustment screw A clockwise,
or turn the adjustment screw B counterclockwise.
or turn the adjustment screw B counterclockwise.
* The adjustment screws A and B must be turned in proper
balance. For example, if the trouble is not removed by turn-
ing the adjustment screw A 180 degrees clockwise, do not
turn the adjustment screw A furthermore, but turn the adjust-
ment screw B 180 degrees counterclockwise.
ing the adjustment screw A 180 degrees clockwise, do not
turn the adjustment screw A furthermore, but turn the adjust-
ment screw B 180 degrees counterclockwise.
Repeat steps 2 to 5 until an acceptable result is obtained.
NOTE: Since turning the adjustment screw too much may cause
the optical axis trouble, turn in less than one turn clockwise
or counterclockwise.
or counterclockwise.
ADJ 14
Scan image magnification ratio
adjustment (Document table
mode)
adjustment (Document table
mode)
This adjustment is needed in the following situations:
* When the copy image magnification ratio in the sub scanning
* When the copy image magnification ratio in the sub scanning
direction is not properly adjusted.
* When the scanner motor is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
Before this adjustment, the focus adjustment (CCD unit installing
position adjustment) must have been completed.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
Before this adjustment, the focus adjustment (CCD unit installing
position adjustment) must have been completed.
14-A
Scan image magnification ratio adjustment
(Main scanning direction) (Document table
mode)
(Main scanning direction) (Document table
mode)
1)
Place a scale on the document table as shown in the figure
below.
below.
A
0 - 1.0mm
A
B
10
20
30
40
50
60
70
80
90
100
1
10
120
120
1
30
140
140
1
50
MX-4101N ADJUSTMENTS 5 – 39
2)
Enter the simulation 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 (MAIN) adjustment value of Simulation 48-1.
When the adjustment value is increased, the copy magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
Repeat the procedures 3) - 5) until the copy magnification ratio
is within the specified range (100
When the adjustment value is increased, the copy magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
Repeat the procedures 3) - 5) until the copy magnification ratio
is within the specified range (100
±1.0%).
14-B
Scan image magnification ratio adjustment
(Sub scanning direction) (Document table
mode)
(Sub scanning direction) (Document table
mode)
1)
Place a scale on the document table as shown in the figure
below.
below.
2)
Enter the simulation 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%.
Repeat the procedures 3) - 5) until the copy magnification ratio is
within the specified range (100
within the specified range (100
±1.0%).
ADJ 15
Scan image magnification ratio
adjustment (RSPF/DSPF mode)
adjustment (RSPF/DSPF mode)
15-A
Scan image magnification ratio adjustment
(Main scanning direction) (RSPF mode)
(Main scanning direction) (RSPF mode)
15-C
Scan image magnification ratio adjustment
(Main scanning direction) (DSPF mode)
(Main scanning direction) (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 RSPF/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 RSPF/DSPF is disassembled.
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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%
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