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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.

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.

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.

[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.

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)

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.

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.

[Check Method 1]

0 - 1.0mm

1

2

Paper pass direction

a

b

c

d

(Front side)
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

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.

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.

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 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]

If c < d, turn the DSPF skew adjustment screw A 
counterclockwise, 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

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.

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.

 

This adjustment is needed in the following situations:
* 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.

 

1)

Place a scale on the document table as shown in the figure
below.

0 - 1.0mm

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.

4)

Check that the copy magnification ratio is within the specified
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.

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 

±1.0%).

 

1)

Place a scale on the document table as shown in the figure
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.

4)

Check that the copy magnification ratio is within the specified
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.

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%.

Repeat the procedures 3) - 5) until the copy magnification ratio is
within the specified range (100 

±1.0%).

 

 

 

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.

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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)

(Example 2)
Copy B
(Longer than
the original)

Scale
(Original)

Copy magnifi-
cation ratio

(Original dimension - Copy dimension)

Original dimension

100%

MX-4101N  ADJUSTMENTS  5 – 40

1)

Place the duplex adjustment chart shown below on the docu-
ment tray of the RSPF/DSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.

2)

Make a duplex copy at the normal ratio on A4 paper.

3)

Measure the images on the copy paper and the original
images.

4)

Obtain the image magnification ratio according to the following
formula:
Image magnification ratio = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
(100 

± 0.8%), there is no need to perform the adjustment.

If it is not within the specified range, perform the following pro-
cedures.

5)

Enter the SIM48-1 mode.

* Items A, C, E: When the set value is increased by 1, the

magnification ratio is increased by 0.02%.

* Items B, D, F: When the set value is increased by 1, the

magnification ratio is increased by 0.1%.

* It affects scanning (PC scanning, etc.) as well as copying.

6)

Select an adjustment item of SPF (MAIN)/SPFB (MAIN) with
the scroll key.

7)

Enter an adjustment value with 10-key, and press [OK] key.
When the adjustment value is increased, the image magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the image magni-
fication ratio is changed by 0.02%.

Repeat the procedures of 1) - 7) until a satisfactory result is
obtained.

NOTE: When [CLOSE] key is pressed in this simulation mode, the

machine goes into the normal operation mode. Under this
state, copy check can be normally performed. When the
system key is pressed, the machine returns to the simula-
tion mode.

A4 size

(Both the front surface

and the back surface)

10mm

10mm

Paper pass direction

original

10

50

100

150

200

250

copy

10

50

100

150

200

250

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2.

A

CCD (MAIN)

SCAN main scanning 
magnification ratio 
adjustment (CCD)

1 - 99

50

B

CCD (SUB)

SCAN sub scanning 
magnification ratio 
adjustment (CCD)

1 - 99

50

C

SPF (MAIN)

DSPF document front 
surface magnification ratio 
adjustment (Main scan)

1 - 99

50

D

SPF (SUB)

DSPF document front 
surface magnification ratio 
adjustment (Sub scan)

1 - 99

50

E

SPFB (MAIN)

DSPF document back 
surface magnification ratio 
adjustment (Main scan)

1 - 99

50

A

CCD (MAIN)

SCAN main scanning 
magnification ratio 
adjustment (CCD)

1 - 99

50

B

CCD (SUB)

SCAN sub scanning 
magnification ratio 
adjustment (CCD)

1 - 99

50

C

SPF (MAIN)

RSPF document front 
surface magnification ratio 
adjustment (Main scan)

1 - 99

50

D

SPF (SUB)

RSPF document front 
surface magnification ratio 
adjustment (Sub scan)

1 - 99

50

E

SPFB (MAIN)

RSPF document back 
surface magnification ratio 
adjustment (Main scan)

1 - 99

50

F

SPFB (SUB)

RSPF document back 
surface magnification ratio 
adjustment (Sub scan)

1 - 99

50

SPF (MAIN)

Main scanning direction image magnification ratio 
(Front surface) 

SPFB (MAIN)

Main scanning direction image magnification ratio 
(Back surface)