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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

MX-7000N  ADJUSTMENTS  6 – 33

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(SUB) with scroll key.
This adjustment items is intended to adjust the image magnifi-
cation in the sub-scanning direction in DSPF mode. (SPFB
(SUB))

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.

NOTE: After adjusting the image magnification in the sub-scanning

direction through Simulation 48-1, do the following steps if
making a copy at a different magnification factor fails to
produce a correctly scaled copy.

1)

Enter the simulation 48-5 mode.

2)

Select the item corresponding to be adjusted with scroll key.

3)

Enter the image magnification adjustment value with the 10-
key. 
Make adjustments by changing the adjustment value for high
revolution mode if the copy magnification is not correct for
microcopies; or the adjustment value for low revolution mode if
the copy magnification is not correct for blowbacks.

4)

Press [OK] key.
This applies the adjustment value.

 

This adjustment is required in the following cases:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the DSPF section is disassembled.
* When the DSPF unit is installed.
* When the DSPF unit is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.

 

1)

Make a copy of the adjustment chart (made by your self) in the
adjustment mode (document table or DSPF).

2)

Check the copy image center position.
If A – B = 

± 1.0mm, the adjustment is not required.

If the above condition is not satisfied, perform the following
procedures.

3)

Enter the simulation 50-12 mode.

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

;

MR(HI)

B : 50

;

MR(MID)

C : 50

;

MR(LO)

D : 50

;

DSPF(HI)

A:

SIMULATION NO.48-05

MOTOR SPEED ADJUSTMENT

XX

1

99

OK

TEST

CLOSE

E : 50

;

DSPF(MID)

F : 50

;

DSPF(LO)

B

A = B

A

B'

A' - B' =

1.0mm

A'

(100%)

A : 50

;

OC

B : 50

;

SPF(SIDE1)

C : 50

;

SPF(SIDE2)

A:

SIMULATION NO.50-12

ORIGINAL CENTER OFFSET SETUP

XX

1

99

OK

TEST

CLOSE

MX-7000N  ADJUSTMENTS  6 – 34

4)

Select the adjustment mode OC with the scroll key.

5)

Enter the adjustment value with 10-key, and press [OK] key.
The entered value is set.
When the set value is increased, the main scanning print posi-
tion is shifted to the front side by 0.1mm.

6)

Press [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
Repeat the procedures of 2) – 6) until the above condition is
satisfied.

 

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.
* The scanner (reading) section has been disassembled.
* The scanner (reading) unit has been replaced.
* When a U2 trouble occurs.
* The DSPF section has been disassembled.
* The DSPF unit has been replaced.
(Adjustment mode selection)
1)

Enter the simulation 50-12 mode.

(UNIT: 0.1mm/STEP When the value is increased, the image is
shifted to the front side.)

2)

Using the scroll key, select the adjustment item SPF(SIDE2),
which is intended to adjust the off-center in DSPF back surface
mode. 

3)

Press [OK] key.

(Scan off-center adjustment)
1)

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

2)

Press [START] key.
Since the front side and back side images are copied onto sep-
arate sheets, check the off-center of the back side image.
If the off-center is 0 

± 2.7 mm, no adjustment is required.

If the above requirement is not met, do the following steps. 

3)

Enter the scanned image off-center position adjustment value
with the 10-key.
(The adjustment value should be changed in steps of 0.1mm.)
(When the adjustment is increased, the print image is shifted
to the front side.)

4)

Press [OK] key.
Pressing the [OK] key starts copy operation as well as applying
the adjustment value. 

5)

Check the off-center of the printed image.

Repeat the above adjustments until an acceptable result is
obtained.

 

This adjustment is required in the following cases:
* When the LSU is replaced or removed.
* When the paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual paper feed tray is replace.
* When the manual paper feed tray is disassembled.
* When the duplex section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replace.
* When the large capacity paper feed tray section is disassembled.
* When the resist roller section is disassembled.
* When a U2 trouble occurs.
* When the PCU PWB is replaced.
* When the EEPROM on the PCU PWB is replaced.
(Caution)
Before executing this adjustment, be sure to execute “ADJ 10 Print
engine image magnification ratio adjustment (BK) (Main scanning
direction) (Print engine section) (Manual adjustment)” in advance.
1)

Enter the simulation 50-10 mode.

A

OC

OC mode adjustment

0 – 99

50

B

SPF(SIDE1)

DSPF front surface adjustment

C

SPF(SIDE2)

DSPF back surface adjustment

A : 50

;

OC

B : 50

;

SPF(SIDE1)

C : 50

;

SPF(SIDE2)

A:

SIMULATION NO.50-12

ORIGINAL CENTER OFFSET SETUP

XX

1

99

OK

TEST

CLOSE

original

copy

a

b

A : 100

;

BK-MAG

B : 50

;

MFT

C : 50

;

CS1

D : 50

;

CS2

A:

SIMULATION NO.50-10

PAPER CENTER OFFSET SETUP

XXX

XXX

60

140

OK

TEST

CLOSE

E : 50

;

CS3

F : 50

;

CS4

G : 50

;

LCC

H : 50

;

ADU

I :

1

;

MULTICOUNT

J :

2

;

PAPER : CS1

K :

1

;

DUPLEX : NO

EXECUTE

A : 50

;

BK-MAG

B : 50

;

MFT

C : 50

;

CS1

D : 50

;

CS2

A:

SIMULATION NO.50-10

PAPER CENTER OFFSET SETUP

60

140

OK

TEST

CLOSE

E : 50

;

CS3

F : 50

;

CS4

G : 50

;

LCC

H : 50

;

ADU

I :

1

;

MULTICOUNT

J :

2

;

PAPER : CS1

K :

1

;

DUPLEX : NO

EXECUTE

End of print

EXECUTE

10-key

EXECUTE