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MX-7000N  ADJUSTMENTS  6 – 16

3)

Set A4 (11 x 8.5) paper in the paper feed tray selected in pro-
cedure 2).

4)

Press [EXECUTE] key.
The adjustment pattern is printed.

5)

Check the adjustment pattern image position.
Measure the dimension of the void area in the front and the
rear frame direction of the adjustment pattern, and check that
all the following conditions are satisfied.

RV: REAR VOID AREA
FV: FRONT VOID AREA
RV + FV 

≤ 4.0mm

RV = 2.0 

± 2.0mm

FV = 2.0 

± 2.0mm

If the above conditions are not satisfied, execute the proce-
dures below.

6)

Select the paper feed mode adjustment item (B – H) to be
adjusted with the scroll key.

7)

Change the adjustment value.
Enter the adjustment value and press [OK] or [EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the adjustment pat-
tern is shifted to the front frame side. When it is decreased, the
adjustment pattern is shifted to the rear frame side.
When the set value is changed by 1, the shift distance is
changed by about 0.1mm.
Repeat procedures 3) – 7) until the conditions of procedure 5)
are satisfied.
In case a satisfactory result cannot be obtained by repeating
the above procedures, perform the following procedure.

8)

Loosen the paper feed tray off-center adjustment screws (2
pcs.) at the center section of the lift plate of the paper feed tray,
and change the gear unit position in the front/back frame direc-
tion. Repeat the adjustment procedures from 4).

 

This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When the color image registration mistake in the main scanning

direction occurs.

* When the color image registration mistake in the sub scanning

direction occurs.

* When the unit is installed or when the installing place is changed.
* When maintenance is executed. (Replacement of the OPC drum,

the OPC cartridge, the transfer unit, the transfer belt, etc.)

* When “ADJ 10 Print engine image magnification ratio adjustment

(BK) (Main scanning direction) (Print engine section) (Manual
adjustment)” is performed.

* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
■

(Before execution of this adjustment, all the following adjustments
must have been completed.)
* Image skew adjustment (LSU (writing) unit)
* ADJ 10 Print engine image magnification ratio adjustment (BK)

(Main scanning direction) (Print engine section) (Manual adjust-
ment)

J

PAPER

MFT

Paper feed 
tray select

Manual paper 
feed tray

1 – 6

1

2 (CS 1)

CS 1

Paper feed 
tray 1

2

CS 2

Paper feed 
tray 2

3

CS 3

Paper feed 
tray 3

4

CS 4

Paper feed 
tray 4

5

LCC

LCC

6

K

DUPLEX

YES

Duplex 
print select

Selected

0 – 1

0

1 (NO)

MX-7000N  ADJUSTMENTS  6 – 17

 

In this adjustment, the image registration adjustment in the main
scanning direction and that in the sub scanning direction are exe-
cuted simultaneously and automatically.
1)

Enter SIM50-22 mode.

2)

Press [REGIST] key to select the image registration adjust-
ment auto adjustment mode.

3)

Press [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto
adjustment is started. After completion of the adjustment,
[EXECUTE] key returns to the normal display and the adjust-
ment result is displayed.
It takes about 40 sec to complete the adjustment.

MAIN, SUB: The entered value after adjustment is displayed.
( ): Difference from the previous value.
Example: This time 105, previous time 103: 105 (+2)
* In case of an error, "ERROR" is displayed with the details.

To check the auto adjustment result, use the manual image
registration adjustment mode below.
* Image registration adjustment (Main scanning direction) (Manual

adjustment) (SIM50-20)

* Image registration adjustment (Sub scanning direction) (Manual

adjustment) (SIM50-21)

 

1)

Enter SIM50-20 mode.

REGIST

MAIN 
F

C

Image registration 
adjustment value (Main 
scanning direction) 
(Cyan) (F side)

1.0 – 199.0

100

M

Image registration 
adjustment value (Main 
scanning direction) 
(Magenta) (F side)

1.0 – 199.0

100

Y

Image registration 
adjustment value (Main 
scanning direction) 
(Yellow) (F side)

1.0 – 199.0

100

Normal end

Abnormal end

SIMULATION NO.50-22

TEST

AUTO ADJUSTMENT OF REGISTRATION&DLUM POSITION

CLOSE

EXECUTE

NOW EXECUTING...

SIMULATION NO.50-22

TEST

AUTO ADJUSTMENT OF REGISTRATION&DLUM POSITION

CLOSE

EXECUTE

PRESS [EXECUTE] TO START

ERRORTONNER EMPTY 01

SIMULATION NO.50-22

TEST

AUTO ADJUSTMENT OF REGISTRATION&DLUM POSITION

EXECUTE

EXECUTE

MAIN F

MAIN R

SUB

C

105.0(+0.2)

110.0(-0.1)

103.0(+0.4)

M

100.0(+0.0)

99.0(-0.2)

99.0(+0.2)

Y

98.0(+0.3)

98.0(+0.1)

105(+0.0)

1/1

CLOSE

REGIST

DRUM POS

ALL

START POINT

AMP

CL

1(2)

0(1)

PHASE

M

1(2)

0.0(0.1)

K

1(2)

0(1)

C

1(2)

AMP

0.0(0.1)

Y

0.0(0.1)

REGIST

MAIN 
R

C

Image registration 
adjustment value (Main 
scanning direction) 
(Cyan) (R side)

1.0 – 199.0

100

M

Image registration 
adjustment value (Main 
scanning direction) 
(Magenta) (R side)

1.0 – 199.0

100

Y

Image registration 
adjustment value (Main 
scanning direction) 
(Yellow) (R side)

1.0 – 199.0

100

SUB

C

Image registration 
adjustment value (Sub 
scanning direction) 
(Cyan)

1.0 – 199.0

100

M

Image registration 
adjustment value (Sub 
scanning direction) 
(Magenta)

1.0 – 199.0

100

Y

Image registration 
adjustment value (Sub 
scanning direction) 
(Yellow)

1.0 – 199.0

100

A : 100

;

CYAN(FRONT)

B : 100

;

CYAN(REAR)

C : 100

;

MAGENTA(FRONT)

D : 100

;

MAGENTA(REAR)

A:

SIMULATION NO.50-20

REGISTRATION ADJUSTMENT : FRONT-REAR DIRECTION

XXX

XXX

1

199

OK

TEST

CLOSE

E : 100

;

YELLOW(FRONT)

F : 100

;

YELLOW(REAR)

G :

1

;

MULTICOUNT

H :

4

;

PAPER : CS3

I :

1

;

DUPLEX : NO

EXECUTE

A : 50

;

CYAN(FRONT)

B : 100

;

CYAN(REAR)

C : 100

;

MAGENTA(FRONT)

D : 100

;

MAGENTA(REAR)

A:

SIMULATION NO.50-20

REGISTRATION ADJUSTMENT : FRONT-REAR DIRECTION

1

199

OK

TEST

CLOSE

E : 100

;

YELLOW(FRONT)

F : 100

;

YELLOW(REAR)

G :

1

;

MULTICOUNT

H :

4

;

PAPER : CS3

I :

1

;

DUPLEX : NO

EXECUTE

End of print

EXECUTE

EXECUTE

10-key

MX-7000N  ADJUSTMENTS  6 – 18

2)

Select the paper feed tray with A3 (11 x 17) paper in it by
changing the value of set item H.

3)

Press [EXECUTE] key.
The image registration adjustment pattern in the main scan-
ning direction is printed.

A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range (0 

± 1)

4)

Check the rough adjustment and the fine adjustment print pat-
tern positions of each color in the front frame and the rear
frame sides.
Use the visually highest color density section as the center,
and measure the shift amount.
The front frame registration and the rear frame registration are
adjusted independently.
To check the image registration, therefore, check the front
frame side and the rear frame side individually.

(If the fine adjustment print pattern is located in the range of 0
± 1 from the fine adjustment reference pattern scale, the
adjustment is not required.)
If the above condition is not satisfied, select the color mode
adjustment item A – F 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 table below.

㪝㩷㫊㫀㪻㪼㩷㫄㪸㫉㫂

A

㪩㩷㫊㫀㪻㪼㩷㫄㪸㫉㫂

A

A

A

A

A

C

C

C

C

C

C

B

B

Rough adjustment 
print pattern check:

Check that the rough adjustment 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.

A

CYAN 
(FRONT)

Image registration adjustment 
value (Main scanning 
direction) (Cyan) (F side)

1 – 199

100

B

CYAN 
(REAR)

Image registration adjustment 
value (Main scanning 
direction) (Cyan) (R side)

1 – 199

100

C

MAGENTA 
(FRONT)

Image registration adjustment 
value (Main scanning 
direction) (Magenta) (F side)

1 – 199

100

D

MAGENTA 
(REAR)

Image registration adjustment 
value (Main scanning 
direction) (Magenta) (R side)

1 – 199

100

E

YELLOW 
(FRONT)

Image registration adjustment 
value (Main scanning 
direction) (Yellow) (F side)

1 – 199

100

F

YELLOW 
(REAR)

Image registration adjustment 
value (Main scanning 
direction) (Yellow) (R side)

1 – 199

100

MX-7000N  ADJUSTMENTS  6 – 19

(Measurement of the shift amount and the calculation of
the adjustment value)
a)

Measurement of the shift amount
* Measurement of the fine adjustment pattern

The visually highest color density section is regarded as
the center, and used as the measurement value.
(Example)
The measurement value of the figure is "7."

* 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 20, the second line mark as 40, the third line mark as
60. The interval between the rough adjustment marks
corresponds to 20.
(Example)
In the case of the figure, it is between 20 – 40 of the
plus polarity, and the measurement is "20."

* The actual shift amount is the sum of the rough adjust-

ment reference shift amount and the fine adjustment
shift amount.
Shift amount (correction value) = Rough adjustment
shift amount + Fine adjustment shift amount
When calculating, be careful of the plus polarity and the
minus polarity.
(Example)
In the case of the figure, the total shift amount is 27.
Measurement value: 27 (= 20 + 7)

The shift amount from the adjustment reference position
is calculated for each of six kinds of adjustment items A
– F.

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.
Adjustment value = Current adjustment value + Shift
amount (correction 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)

20

-20