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MX-7000N  ADJUSTMENTS  6 – 29

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.

 

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]

[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 "ADJ 15C DSPF 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.

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

0 - 1.0mm

1

2

MX-7000N  ADJUSTMENTS  6 – 30

[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]

[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 "ADJ 15B DSPF 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.

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

0 - 1.0mm

MX-7000N  ADJUSTMENTS  6 – 31

* 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 4 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 required in the following cases:
* When the copy image magnification ration 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.

2)

Enter the simulation 48-1 mode.

3)

Make a normal copy and obtain the copy magnification ratio.
Press [CLOSE] key and 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 in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.02%.
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 and 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%).

A : 50

;

CCD(MAIN)

B : 50

;

CCD(SUB)

C : 50

;

SPF(MAIN)

D : 50

;

SPF(SUB)

A:

SIMULATION NO.48-01

MAGNIFICATION ADJUSTMENT

XX

1

99

OK

TEST

CLOSE

E : 50

;

SPFB(MAIN)

F : 50

;

SPFB(SUB)

A : 50

;

CCD(MAIN)

B : 50

;

CCD(SUB)

C : 50

;

SPF(MAIN)

D : 50

;

SPF(SUB)

A:

SIMULATION NO.48-01

MAGNIFICATION ADJUSTMENT

XX

1

99

OK

TEST

CLOSE

E : 50

;

SPFB(MAIN)

F : 50

;

SPFB(SUB)

10

20

90

100

110

10

20

90

100

110

10

20

90

100

110

Copy magnification ratio

(Original dimension – Copy dimension)

Original dimension

=

x 100 [%]

(Example 1)
Copy A
(Shorter than
the original)

Scale
(Original)

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

MX-7000N  ADJUSTMENTS  6 – 32

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 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.
* Images are not correctly magnified in the main scanning direc-

tion.

1)

On the DSPF original tray, place such an original as illustrated
below.

2)

Make a normal duplex copy on A4 paper.

3)

Measure the lengths of the copied image (back surface) and
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.

5)

Enter the simulation 48-1 mode.

6)

Select the SPFB(MAIN) with scroll key.

7)

Enter the image magnification adjustment value with the 10-
key. 

8)

Press [OK] key.
Pressing the [OK] key starts copy operation as well as applying
the adjustment value.
Repeat the above adjustments until an acceptable result is
obtained.

 

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.
* The EEPROM on the scan control PWB has been replaced.
* When a U2 trouble occurs.
1)

On the DSPF original tray, place such an original as illustrated
below.

2)

Make a normal copy on A4 paper.

3)

Measure the lengths of the copied image and the original
image.

A4 size

(both sides)

10mm

10mm

Paper pass direction

original

10

50

100

150

200

250

copy

10

50

100

150

200

250

A : 50

;

CCD(MAIN)

B : 50

;

CCD(SUB)

C : 50

;

SPF(MAIN)

D : 50

;

SPF(SUB)

A:

SIMULATION NO.48-01

MAGNIFICATION ADJUSTMENT

XX

1

99

OK

TEST

CLOSE

E : 50

;

SPFB(MAIN)

F : 50

;

SPFB(SUB)

A4 size

10mm

10mm

Paper pass direction

original

copy

10

50

100

150

200

10

50

100

150

200