Sharp MX-3500N / MX-3501N / MX-4500N / MX-4501N (serv.man12) Service Manual ▷ View online
MX3501N ADJUSTMENTS 7 – 1
MX3501N
Service Manual
[7] ADJUSTMENTS
1. 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 (clearance B is more than
1mm): 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.
1mm): 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.
2. 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 71 (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 71 (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
MX3501N ADJUSTMENTS 7 – 2
[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.
3. 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 71 (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 71 (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
MX3501N ADJUSTMENTS 7 – 3
[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 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.
4. Image focus adjustment (front surface
mode)
For details of this adjustment, refer to "[6] ADJUSTMENTS" of the
copier Service Manual (00ZMX3500NS1E).
copier Service Manual (00ZMX3500NS1E).
5. Image focus adjustment (back surface
mode)
This adjustment is required in the following cases:
* When the DSPF CCD unit is replaced.
* When the DSPF CCD unit is replaced.
* When the COPY/SCAN/FAX image focus is not properly
* When the DSPF CCD unit is replaced.
* When the DSPF CCD unit is replaced.
* When the COPY/SCAN/FAX image focus is not properly
adjusted.
* When the DSPF unit is removed.
* When the DSPF unit is replaced.
1)
* When the DSPF unit is replaced.
1)
Make a duplex copy in DSPF mode.
2)
Make sure that the copied image on the back side of the paper
is satisfactorily focused.
If the image is not satisfactorily focused, do the following
steps.
is satisfactorily focused.
If the image is not satisfactorily focused, do the following
steps.
3)
Open the door. Remove the screws, and remove the transport
PG upper.
PG upper.
4)
To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.
CCD unit base as shown below.
A
0 - 1.0mm
A
B
MX3501N ADJUSTMENTS 7 – 4
5)
Loosen the CCD unit fixing screws (4 pcs.).
* Never loosen the screws marked with
✕.
Loosening these screws could possibly change the CCD
unit base optical axis. Once the optical axis has been
changed, it cannot be corrected through on-site adjust-
ments. Solving such a problem requires the replacement of
the entire scanner unit.
unit base optical axis. Once the optical axis has been
changed, it cannot be corrected through on-site adjust-
ments. Solving such a problem requires the replacement of
the entire scanner unit.
6)
Slide the CCD unit in the arrow direction (CCD sub scanning
direction) to change the installing position.
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked
direction) to change the installing position.
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked
in procedure 4).
7)
Make a copy and check the copy magnification ratio again.
If the copy magnification ratio is not in the range of 100
If the copy magnification ratio is not in the range of 100
± 1%,
repeat the procedures of 4) – 6) until the condition is satisfied.
NOTE: By changing the CCD unit fixing position with the simula-
tion 48-1 adjustment value at 50, the copy magnification
ratio is adjusted within the specified range (100
ratio is adjusted within the specified range (100
± 1.0%)
and the specified resolution is obtained based on the opti-
cal system structure.
cal system structure.
6. Image magnification in the main
scanning direction adjustment (front
surface mode)
surface mode)
For details of this adjustment, refer to "[6] ADJUSTMENTS" of the
copier Service Manual (00ZMX3500NS1E).
copier Service Manual (00ZMX3500NS1E).
7. Image magnification in the main
scanning direction adjustment (back
surface mode)
surface mode)
This adjustment is required in the following cases:
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
* The EEPROM on the scan control PWB has been replaced.
* When a U2 trouble occurs.
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
* The EEPROM on the scan control PWB has been replaced.
* When a U2 trouble occurs.
* Images are not correctly magnified in the main scanning direc-
tion.
1)
On the DSPF original tray, place such an original as illustrated
below.
below.
2)
Make a normal duplex copy on A4 paper.
3)
Measure the lengths of the copied image (back surface) and
the original image.
the original image.
4)
Determine the image magnification factor using the following
formula:
Image magnification factor (%) = Copy dimension/original
dimension x 100
Image magnification factor (%) = 99 / 100 x 100 = 99
If the image magnification factor is within the spec (100±0.8%),
no adjustment is required; otherwise, do the following steps.
formula:
Image magnification factor (%) = Copy dimension/original
dimension x 100
Image magnification factor (%) = 99 / 100 x 100 = 99
If the image magnification factor is within the spec (100±0.8%),
no adjustment is required; otherwise, do the following steps.
5)
Enter the simulation 48-1 mode.
1)
Select the item corresponding to be adjusted with scroll key.
2)
Press [START] key.
3)
Enter the image magnification adjustment value with the 10-
key.
key.
4)
Press [START] key.
Pressing the [START] key starts copy operation as well as
applying the adjustment value.
Repeat the above adjustments until an acceptable result is
obtained.
Pressing the [START] key starts copy operation as well as
applying the adjustment value.
Repeat the above adjustments until an acceptable result is
obtained.
8. Image magnification in the sub
scanning direction adjustment
This adjustment is required in the following cases:
* Images are not correctly magnified in the sub-scanning direction.
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
* Images are not correctly magnified in the sub-scanning direction.
* The MFP control PWB has been replaced.
* The EEPROM on the MFP control PWB has been replaced.
* The scan control PWB has been replaced.
A
B
A4 size
(both sides)
10mm
10mm
Paper pass direction
original
10
50
100
150
200
250
copy
10
50
100
150
200
250
CLOSE
0
A:
A㧦 50
B㧦 50
C㧦 50
D㧦 50
㧧
CCD(MAIN)
㧧
CCD(SUB)
㧧
SPF(MAIN)
㧧
SPF(SUB)
SIMULATION NO.48㧙01
MAGNIFICATION ADJUSTMENT
XX
㨇
1㨪99 㨉
OK
TEST
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