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MX-7000N  ADJUSTMENTS  6 – 13

(When Method 2 is used to check the black image for any
skew (right angle) in procedure 4)
If the image is skewed in the arrow direction of A, shift the
adjustment screw to X direction. If the image is skewed in the
arrow direction of B, shift the adjustment screw to Y direction.

7)

Close the front cover (lower).

8)

Execute procedures 3) – 4).
(Repeat procedures 5) – 8) until a satisfactory result is
obtained.)

9)

If the adjustment result reaches the satisfactory level, tighten
the adjustment screw.
(The black image skew adjustment is completed with the
above.)

10) In the above black image skew adjustment, check the color

image skew pattern printed when completion of the adjust-
ment.

In each Y/M/C color print pattern printed separately in the front
frame direction and in the rear frame direction, note the same
print color pattern and check to confirm that the difference in
the highest density sections is within 

± 1 step.

(Compare the front and the rear frame positions of the same-
color print color patterns. All the highest density sections of all
the print color patterns may not be aligned on a line. Compare
only the same-color patterns.)
If the above condition is not satisfied, execute the procedures
below.

11) Turn the image skew adjustment screw of the target color to

adjust.

When each adjustment screw is turned, it clicks. Turn it by
5 – 6 clicks and the check pattern is changed by 1 step (1
dot size).
When the image skew pattern on the front frame side is
skewed in the arrow direction of A (to the smaller character)
from the rear frame side, turn the adjustment screw counter-
clockwise. When the image is skewed in the arrow direction of
B (to the larger character), turn the adjustment screw clock-
wise.

12) Print the check pattern.
13) Check the color image skew pattern.
Repeat procedures 11) – 13) until a satisfactory result is obtained.
The image skew adjustment (LSU unit) is executed by changing
the parallelism of the LSU unit scan laser beam for the OPC drum.

 

This adjustment must be executed in the following cases:

NOTE: This machine is provided with the manual photoconductor

phase adjustment function (SIM 44-31), which, however, is
rather difficult to perform. Therefore, it is advisable to use
SIM 50-22 to perform the automatic adjustment. 

* When the OPC drum is replaced.
* When the OPC drum is removed from the main unit.
* When the OPC drum drive section is disassembled.
* When the OPC drum drive unit is replaced.
* When U2 trouble occurs.
* When the PCU MAIN PWB is replaced.
* When EEPROM on the PCU MAIN PWB is replaced.

R

F

*A

*A: Rough adjustment pattern

*B

*B: Fine adjustment pattern

*B

Direction A

Direction B

Magenta

Cyan

Yellow

MX-7000N  ADJUSTMENTS  6 – 14

1)

Enter SIM50-22 mode.

2)

Press [ALL] key.
(The machine enters the OPC drum phase adjustment mode/
image registration adjustment (auto adjustment) mode, and
both adjustments are executed simultaneously in this mode.)
The OPC drum phase adjustment and the image registration
adjustment can be individually executed by [REGIST] key and
[DRUM POS] key. Since, however, the image registration
adjustment must be executed when the OPC drum phase
adjustment is completed, both adjustment are executed in this
adjustment simultaneously.

3)

Press [EXECUTE] key.
The OPC drum phase adjustment and the image registration
adjustment are executed automatically.

* After completion of the adjustment, the drum motor stops and

[EXECUTE] key returns to the normal display and the adjustment
result is displayed.
MAIN, SUB: Image regist adjustment value is displayed.

( ) is the difference from the previous adjustment value.
Example: This time 105.0, previous time 103.0: 105.0 (+2)

PHASE: OPC drum phase adjustment value is displayed.

( ) is the previous adjustment value.
Example: This time 90

°, previous time 45°: 3  (2)

* In case of an error, "ERROR" is displayed with the details.

 

This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)

Enter SIM50-10 mode.

2)

Set A4 (11 x 8.5) paper in the paper feed tray.

3)

Select the paper feed tray set in procedure 2) with the scroll
key.

4)

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

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)

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

MX-7000N  ADJUSTMENTS  6 – 15

5)

Check that the inside dimension of the printed half tone is 240
± 0.5mm.

If the above condition is not satisfied, execute the procedures
below.

6)

Change the set value of set item A.
When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.

Repeat procedures 2) – 6) until a satisfactory result is obtained.

 

This adjustment must be executed in the following cases:
* When the LSU is replaced or removed.
* When “ADJ 10 Print engine image magnification ratio adjustment

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

* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual feed tray is replaced.
* When the manual 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 replaced.
* When the large capacity paper feed tray section is disassembled.
* When the regist roller section is disassembled.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
(Caution)
Before execution of this adjustment, check the following item.
* Check to insure that the Print engine image magnification ratio

adjustment (BK) (Main scanning direction) (Print engine section)
(Manual adjustment) has been properly adjusted.

1)

Enter SIM50-10 mode.

2)

Select set item J with the scroll key and enter the value corre-
sponding to the paper feed tray to be adjusted.

A

BK-MAG

Main scan print 
magnification ratio BK

60 – 140

100

B

MFT

Print off-center adjustment 
value (Manual feed tray)

1 – 99

50

C

CS1

Print off-center adjustment 
value (Paper feed tray 1)

1 – 99

50

D

CS2

Print off-center adjustment 
value (Paper feed tray 2)

1 – 99

50

E

CS3

Print off-center adjustment 
value (Paper feed tray 3)

1 – 99

50

F

CS4

Print off-center adjustment 
value (Paper feed tray 4)

1 – 99

50

G LCC

Print off-center adjustment 
value (LCC)

1 – 99

50

H

ADU

Print off-center adjustment 
value (ADU)
Note: Before execution of 
this adjustment, check to 
insure that the adjustment 
items A – G have been 
properly adjusted. If not, 
this adjustment cannot be 
made properly.

1 – 99

50

I

MULTI COUNT

Print quantity

1 – 999

1

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

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)