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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)

 

This adjustment is needed in the following situations:
* When the scanner (reading) section is disassembled.
* When the copy image is distorted.

 

Before execution of this adjustment, remove the document table
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.

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.

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.

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.

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.

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.

 

1)

Make a test chart on A3 (11" x 17") paper as shown below.
(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.

3)

Check for distortion in the sub scanning direction.
If La = Lb, there is no distortion.

If there is any distortion in the sub scanning direction, perform
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.)

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.)

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).

 

1)

Make a test chart on A3 (11" x 17") paper as shown below.
(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.

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 there is any distortion in the main scanning direction, perform
the following procedure.

4)

Check the difference (distortion balance) between left-hand
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.

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.

Lc

Ld

Lc

Ld

There is some difference
between the distortion on
the right and that on the left

MX-4101N  ADJUSTMENTS  5 – 29

5)

Change the height balance of the scanner rail on the front
frame side.

Remove the lower cabinet of the operation panel. Loosen the
scanner rail fixing screw to change the balance between the
right and the left heights of the scanner rail.
Repeat the procedures 2) - 5) until the difference between the
image distortions (distortion balance) is deleted.

6)

Without changing the balance of the scanner rail on the front
frame side, change the overall height.

7)

Set the test chart prepared in the procedure 1) on the docu-
ment table, and make a copy on A3 (11" x 17") paper. Check
that the distortion in the main scanning direction is within the
specified range.
Repeat the procedures 6) and 7) until the distortion in the main
scanning direction is in the specified range.
If the distortion in the sub scanning direction cannot be deleted
with the above procedures, perform ADJ 11D Scan image dis-
tortion adjustment (whole scanner unit).

 

This adjustment is executed when scan image distortion cannot be
adjusted with ADJ 11A, ADJ 11B, and ADJ 11C related to the scan
image distortion adjustment.
Change the upper and lower positions of the scanner unit distortion
adjustment plate on the right edge of the scanner unit so that the
scan image distortion is minimized. By adjusting the distortion of
the whole scanner unit, the scan image distortion is adjusted.
1)

Loosen the fixing screw (A).

2)

Adjust the scanner unit distortion adjustment plate.

 

 

This adjustment is needed in the following situations:
* 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)

Enter the simulation 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.

3)

Place a scale on the original table as illustrated below.

4)

Make a normal copy on A4 paper.
Press [CLOSE] key to shift from the simulation mode to the
copy mode, and make a copy.

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