Sharp MX-4100N / MX-4101N / MX-5000N / MX-5001N (serv.man13) Service Manual ▷ View online
MX-4101N ADJUSTMENTS 5 – 25
4)
Check the rough adjustment and the fine adjustment print pat-
tern positions of each color.
Use the visually highest color density section as the center,
and measure the shift amount.
tern positions of each color.
Use the visually highest color density section as the center,
and measure the shift amount.
(If the fine adjustment print pattern is located in the range of 0
±1 from the fine adjustment reference pattern scale, the adjust-
ment is not required.)
If the above condition is not satisfied, select the color mode
adjustment item A - C to be adjusted with the scroll key, and
change the adjustment value to adjust.
±1 from the fine adjustment reference pattern scale, the adjust-
ment is not required.)
If the above condition is not satisfied, select the color mode
adjustment item A - C to be adjusted with the scroll key, and
change the adjustment value to adjust.
Repeat procedures 3) - 4) until a satisfactory result is obtained.
For measurement of the shift amount and the calculation of the
adjustment value, refer to the following.
(Measurement of the shift amount and the calculation of
the adjustment value)
a)
For measurement of the shift amount and the calculation of the
adjustment value, refer to the following.
(Measurement of the shift amount and the calculation of
the adjustment value)
a)
Measurement of the shift amount
* Measurement of the fine adjustment pattern
* Measurement of the fine adjustment pattern
Use the visually highest color density section as the
center, and measure the shift amount.
(Example)
The measurement value of the figure is "14”.
center, and measure the shift amount.
(Example)
The measurement value of the figure is "14”.
* Measurement of the rough adjustment pattern
Check that the color line is positioned in the plus direc-
tion or in the minus direction and judge the polarity from
that.
The center black line is scaled as 0, the first line mark
as 40, the second line mark as 80, the third line mark as
120. The interval between the rough adjustment marks
corresponds to 40.
(Example)
In the case of the figure, it is between 40 - 80 of the plus
polarity, and the measurement is "40”.
A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range
The shift amount is calculated from the adjustment ref-
erence position for each of the three adjustment items A
- C.
tion or in the minus direction and judge the polarity from
that.
The center black line is scaled as 0, the first line mark
as 40, the second line mark as 80, the third line mark as
120. The interval between the rough adjustment marks
corresponds to 40.
(Example)
In the case of the figure, it is between 40 - 80 of the plus
polarity, and the measurement is "40”.
A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range
The shift amount is calculated from the adjustment ref-
erence position for each of the three adjustment items A
- C.
Measurement value: -54 (= -40 - 14)
Measurement value: 54 (= 40 + 14)
Rough adjustment print pattern
check
check
Check that the rough adjustment
print pattern is at the center for the
rough adjustment reference
pattern.
print pattern is at the center for the
rough adjustment reference
pattern.
Fine adjustment print pattern check
Check that the fine adjustment
print pattern is at the center for the
fine adjustment reference pattern.
print pattern is at the center for the
fine adjustment reference pattern.
Display/Item
Content
Adjustment
value range
value range
Default
A
CYAN
Image registration
adjustment value
(Sub scanning direction)
(Cyan)
adjustment value
(Sub scanning direction)
(Cyan)
1 - 199
100
B
MAGENTA
Image registration
adjustment value
(Sub scanning direction)
(Magenta)
adjustment value
(Sub scanning direction)
(Magenta)
1 - 199
100
C
YELLOW
Image registration
adjustment value
(Sub scanning direction)
(Yellow)
adjustment value
(Sub scanning direction)
(Yellow)
1 - 199
100
-40
C
A
B
-120
120
26
-26
28
-28
30
-30
32
-32
34
-34
36
-36
38
-38
0
0
2
-2
4
-4
6
-6
8
-8
10
-10
12
-12
14
-14
16
-16
18
-18
24
-24
22
-22
40
C
A
B
-120
120
26
-26
28
-28
30
-30
32
-32
34
-34
36
-36
38
-38
0
0
2
-2
4
-4
6
-6
8
-8
10
-10
12
-12
14
-14
16
-16
18
-18
24
-24
22
-22
MX-4101N ADJUSTMENTS 5 – 26
b)
Adjustment value calculation
Add or subtract the shift amount calculated above to or
from the current adjustment value, and the result value is
used as the new adjustment value.
(When the shift amount (correction value) is plus)
Adjustment value = Current adjustment value + Shift
amount (correction value)
(When the shift amount (correction value) is minus)
Adjustment value = Current adjustment value - Shift
amount (correction value)
Add or subtract the shift amount calculated above to or
from the current adjustment value, and the result value is
used as the new adjustment value.
(When the shift amount (correction value) is plus)
Adjustment value = Current adjustment value + Shift
amount (correction value)
(When the shift amount (correction value) is minus)
Adjustment value = Current adjustment value - Shift
amount (correction value)
ADJ 11
Scan image distortion
adjustment
adjustment
This adjustment is needed in the following situations:
* When the scanner (reading) section is disassembled.
* When the copy image is distorted.
* When the scanner (reading) section is disassembled.
* When the copy image is distorted.
11-A
Scanner (reading) unit parallelism
adjustment
adjustment
Before execution of this adjustment, remove the document table
glass. (For details, refer to [C]-3.)
1)
glass. (For details, refer to [C]-3.)
1)
Loosen the fixing screws of the scanner unit A and the drive
wire, and remove the scanner unit A from the drive wire.
wire, and remove the scanner unit A from the drive wire.
A
-120
120
26
-26
28
-28
30
-30
32
-32
34
-34
36
-36
38
-38
0
0
2
-2
4
-4
6
-6
8
-8
10
-10
12
-12
14
-14
16
-16
18
-18
24
-24
22
-22
B
-120
120
26
-26
28
-28
30
-30
32
-32
34
-34
36
-36
38
-38
0
0
2
-2
3
-4
6
-6
8
-8
10
-10
12
-12
14
-14
16
-16
18
-18
24
-24
22
-22
C
-120
120
26
-26
28
-28
30
-30
32
-32
34
-34
36
-36
38
-38
0
0
2
-2
4
-4
6
-6
8
-8
10
-10
12
-12
14
-14
16
-16
18
-18
24
-24
22
-22
Previous value before
adjustment
New adjustment value
A: 100
A: 46 (=100-54)
B: 112
B: 126 (=112+14)
C: 95
C: 125 (=95+30)
MX-4101N ADJUSTMENTS 5 – 27
2)
Turn the scanner drive pulley manually and shift the scanner
unit B to bring it into contact with the stopper.
When the scanner unit B is in contact with the two stoppers on
the front and the rear frames simultaneously, the parallelism is
proper.
unit B to bring it into contact with the stopper.
When the scanner unit B is in contact with the two stoppers on
the front and the rear frames simultaneously, the parallelism is
proper.
If this requirement is not met, do the following steps.
3)
Loosen the fixing screw of the pulley angle on the front frame
side of the scanner unit B.
side of the scanner unit B.
4)
Adjust the position of the pulley angle on the front frame side
of the scanner unit B so that it is in contact with two stoppers
on the front and the rear frames simultaneously.
of the scanner unit B so that it is in contact with two stoppers
on the front and the rear frames simultaneously.
5)
Fix the pulley angle on the front frame side of the scanner unit
B.
If a satisfactory result is not obtained from the above proce-
dures, perform the following procedures.
Loosen the fixing screw of the scanner unit drive pulley which
is not in contact.
Without moving the scanner unit drive shaft, turn the scanner
unit drive pulley manually and adjust so that the scanner unit B
is in contact with both stoppers on the front frame and the rear
frame simultaneously. (Change the relative position of the
scanner unit drive pulley and the drive shaft.) Fix the scanner
unit drive pulley fixing screw.
B.
If a satisfactory result is not obtained from the above proce-
dures, perform the following procedures.
Loosen the fixing screw of the scanner unit drive pulley which
is not in contact.
Without moving the scanner unit drive shaft, turn the scanner
unit drive pulley manually and adjust so that the scanner unit B
is in contact with both stoppers on the front frame and the rear
frame simultaneously. (Change the relative position of the
scanner unit drive pulley and the drive shaft.) Fix the scanner
unit drive pulley fixing screw.
6)
With the scanner unit B in contact with both stoppers, fit the
edge of the scanner unit A with the right edge of the frame, and
fix the scanner unit A with the fixing screw.
edge of the scanner unit A with the right edge of the frame, and
fix the scanner unit A with the fixing screw.
11-B
Scan image (sub scanning direction)
distortion adjustment
distortion adjustment
1)
Make a test chart on A3 (11" x 17") paper as shown below.
(Draw a rectangular with four right angles.)
(Draw a rectangular with four right angles.)
L
L
L = 10mm
L
L
MX-4101N ADJUSTMENTS 5 – 28
2)
Set the test chart prepared in the procedure 1) on the docu-
ment table. (Shift the test chart edge 30mm from the reference
position as shown below.) With the document cover open,
make a copy on A3 (11" x 17") paper.
ment table. (Shift the test chart edge 30mm from the reference
position as shown below.) With the document cover open,
make a copy on A3 (11" x 17") paper.
3)
Check for distortion in the sub scanning direction.
If La = Lb, there is no distortion.
If La = Lb, there is no distortion.
If there is any distortion in the sub scanning direction, perform
the following procedures.
the following procedures.
4)
Loosen either one of the fixing screws of the scanner unit drive
pulley. (Either one on the front frame or on the rear frame will
do.)
pulley. (Either one on the front frame or on the rear frame will
do.)
5)
Without moving the scanner unit drive shaft, manually turn the
scanner unit drive pulley to change the parallelism of the scan-
ner unit A and B. (Change the relative position of the scanner
unit drive pulley and the drive shaft.)
scanner unit drive pulley to change the parallelism of the scan-
ner unit A and B. (Change the relative position of the scanner
unit drive pulley and the drive shaft.)
6)
Tighten the scanner unit drive pulley fixing screw.
Repeat the procedures 2) - 6) until the condition of the procedure 3)
is satisfied.
If the distortion in the sub scanning direction cannot be deleted with
the above procedures, perform "ADJ 11D Scan image distortion
adjustment (whole scanner unit).
is satisfied.
If the distortion in the sub scanning direction cannot be deleted with
the above procedures, perform "ADJ 11D Scan image distortion
adjustment (whole scanner unit).
11-C
Scan image (main scanning direction)
distortion adjustment
distortion adjustment
1)
Make a test chart on A3 (11" x 17") paper as shown below.
(Draw a rectangular with four right angles.)
(Draw a rectangular with four right angles.)
2)
Set the test chart prepared in the procedure 1) on the docu-
ment table, and make a copy on A3 (11"x 17") paper.
ment table, and make a copy on A3 (11"x 17") paper.
3)
Check for distortion in the main scanning direction.
If the four angles of the rectangle on the copy are right angles,
there is no distortion and therefore no further steps are
needed.
If the four angles of the rectangle on the copy are right angles,
there is no distortion and therefore no further steps are
needed.
If there is any distortion in the main scanning direction, perform
the following procedure.
the following procedure.
4)
Check the difference (distortion balance) between left-hand
and right-hand side images distortions.
and right-hand side images distortions.
If Lc = Ld, the distortion on the left is equal to that on the right.
(The distortions are balanced.)
If the above condition is satisfied, go to the procedure 6).
If not, perform the following procedures.
(The distortions are balanced.)
If the above condition is satisfied, go to the procedure 6).
If not, perform the following procedures.
La
Lb
L
L
L = 10mm
L
L
Lc
Ld
Copy A
Lc
Ld
Copy B
There is no difference
between the distortion on
the right and that on the left.
between the distortion on
the right and that on the left.
Lc
Ld
Lc
Ld
There is some difference
between the distortion on
the right and that on the left
between the distortion on
the right and that on the left
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