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MX-4070V  ADJUSTMENTS AND SETTINGS  5 – 7

 

Before executing this adjustment, check to confirm the following
items.
• Check to confirm that the color image density sensor (image reg-

istration sensor) is clean

• Check to confirm that the transfer belt is clean and free from

scratches.

 

The image density sensor and the transfer belt surface are used to
make the sensitivity adjustment of the image registration sensor.
This adjustment executes automatically at the outset of registration
adjustment operation and process control operation as well as Sim
44-2
Normally therefore it is not required to perform this adjustment. It is
performed only when the sensor is replaced or when the adjust-
ment result is checked.
1) Enter Sim 44-2 mode
2) Press [EXECUTE] key.

The sensitivity adjustment of the color image density sensor
(image registration sensor) is automatically performed.
After completion of the adjustment the adjustment result is dis-
played and [EXECUTE] key returns to the normal display.
If the adjustment is not completed normally. "ERROR" is dis-
played.

When an error occurs, check the following sections for any abnor-
mality.
• Color image density sensor
• The PCU PWB
• Transfer belt (dirt, scratch)
• Transfer belt cleaner

 

 

This adjustment must be performed in the following cases.
• When the LSU (writing) unit is replaced.
• U2 trouble has occurred
• The PCU PWB has been replaced
• The EEPROM of the PCU PWB has been replaced
1) Enter the SIM 50-10 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) Touch [EXECUTE] key.

The check pattern is printed out.

5)

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

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

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 ration in the
main scanning direction is decreased.
Repeat procedure 2) to 6) until a satisfactory result is obtained.

 

This adjustment must be performed in the following cases.
• When LSU unit is replaced or removed.
• 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 mode paper transport section is disassembled.
• When the registration roller section is disassembled.
• U2 trouble has occurred.
• The PCU PWB has been replaced.
• The EEPROM of the PCU PWB has been replaced.

Before execution of this adjustment, check to insure the following
item
• The print image magnification ratio adjustment ADJ4-A (main

scanning direction) (print engine) (manual adjustment) has been
properly adjusted.

1)

Enter SIM 50-10 mode.

2)

Select the target paper feed tray with the scroll key.

3)

Touch [EXECUTE] key.
The adjustment pattern is printed

240±0.5mm

MX-4070V  ADJUSTMENTS AND SETTINGS  5 – 8

4) Check that the adjustment pattern image is printed in the cor-

rect 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.

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

5) Change the adjustment value.

Enter the adjustment value and touch [OK] key or [EXECUTE]
key.When touch [EXECUTE] key, 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 0.1mm.
Repeat procedures 3) - 6) until the conditions of procedure 5)
are satisfied. In case a satisfactory result cannot be obtained
by repeating the above procedures, perform the following pro-
cedure.

6) 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 until position in the front/rear frame direc-
tion. Repeat the adjustment procedure from 4).

 

This adjustment must be performed in the following cases.
• When the color shift occurred.
• When LSU unit is replaced
• When the unit is installed or when the installing place is changed.
• When maintenance work is performed (replacement of the OPC

drum, the transfer unit, the transfer belt)

• When ADJ4-A print engine image magnification ratio adjustment

(main scanning direction) is performed.

• U2 trouble has occurred.
• When the PCU PWB is replaced.
• When EEPROM on the PCU PWB is replaced.
• When the color phase is not proper even after execution of the

color balance adjustment.

• When the OPC drum drive section is disassembled.
• When the primary transfer unit is replaced (when it removed from

the machine)

• When the developing unit or the OPC drum unit is removed from

the machine.

 

This adjustment performs the print engine image distortion adjust-
ment, the OPC drum phase adjustment and the color registration
adjustment simultaneously.
1)

Enter SIM 50-22 mode.

2)

Touch [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto
adjustment is started. (it takes about 15 sec to complete the
adjustment)

3)

When the adjustment is completed, [EXECUTE] key returns to
the normal display and the value of the adjustment result is
displayed. The current skew level for each color is displayed
on the SKEW display section.

X

Lead edge void area

4.0 ± 1.0mm

Y

Rear edge void area

2.0mm - 5.0mmm

Z1 / Z2

FRONT/REAR VOID AREA

Total 4.0 ± 2.0mm

Z1(2.0mm)

X

4.0±1.0mm

Y

2.0∼5.0mm

Z2(2.0mm)

MAIN F

C

Registration 
adjustment value 
main scanning 
direction F side

1.0 - 

399.0

200

M
Y

MAIN R

C

Registration 
adjustment value 
main scanning 
direction R side

1.0 - 

399.0

200

M
Y

SUB

C

Registration 
adjustment value 
sub scanning 
direction

1.0 - 

399.0

200

M
Y

SKEW

C

Print skew 
amount 
calculation result

L99.9 - 

R99.9

0

If the value is 
positive “L” is 
displayed at the 
head of the 
value if negative 
“R” is displayed.

M
Y

PHASE

OPC drum phase 
adjustment value

1 - 8

1

MX-4070V  ADJUSTMENTS AND SETTINGS  5 – 9

4) Write down the displayed skew level.

Meaning of the skew level value and the adjustment pro-
cedure
* If OK is displayed for all items of SKEW C, M, Y, there is no
need to perform the adjustment.
* When “R” is displayed at the head of the value, turn the LSU
skew adjustment screw clockwise.
* When ”L” is displayed at the head of the value, turn the LSU
skew adjustment screw counterclockwise.
* The turning amount of the adjustment screw corresponds to
each adjustment value. C, M and Y indicate numbers of clicks.
The display value is rounded at the decimal point.
* C, M and Y (SKEW) shows the number of adjustment click
steps for each adjustment screw of C, M and Y.

Contents in ( )
MAIN, SUB: Difference from the previous adjustment value of
image registration.
Example: 105 for this time and 103 for the previous time, it is
displayed as 105.0 (+2.0)
SKEW: Judgment of LSU skew adjustment result OK or NG.
PHASE: OPC drum phase adjustment value of the previous
time.

5) If the display of C, M and Y (SKEW) is NG. all the LSU skew

adjustment screws to adjust and perform the procedures 2) to
4).
Repeat the procedures 2) to 5) until the display of C, M and Y
(SKEW) becomes OK. C, M and Y (SKEW) is OK, go to the
procedure 6).
For the adjustment, remove the front cover and the waste
toner box and turn the skew adjustment screw.

6) Repeat the procedures 2) to 4) again and check to confirm that

C, M and Y (SKEW) are OK. If any of them is NG turn the LSU
skew adjustment screw of the corresponding color to adjust.

When the adjustment is made by turning the LSU skew adjust-
ment screw of K, the states of C, M and Y (SKEW) are
changed. Execute SIM50-22 to check to confirm that C, M and
Y (SKEW) are OK. When an abnormality occurs ERROR is
displayed.
In this case, check each drive section and process section
The adjustment result can be checked by the following manual
adjustment mode.
*ADJ5B
Image skew adjustment (manual adjustment) (SIM 50-20)
*ADJ5C

Color registration offset adjustment (SIM 50-20)

When the color registration is greatly shifted due to replace-
ment of the LSU etc, if SIM 50-22 is used to perform the color
registration automatic adjustment an error may occur.
In this case, the adjustment may be properly executed by set-
ting the adjustment items A - I of SIM 50-20 to 200 and execut-
ing the automatic adjustment again. If color shift in an actual
print image differs in the center, the front side and the rear side
the color shift offset adjustment can improve it. Normally there
is a difference in color shift in several dots. Perform the adjust-
ment only when the adjustment is required.

 

If a more accurate adjustment that the auto adjustment ADJ5A is
required, use this method of adjustment.
This adjustment is made by changing the parallelism of the LSU
unit scan laser beams for the OPC drum.
1)

Enter the SIM 50-20 or 64-1 mode.

2)

Select the paper feed tray with A3 (11” x 17”) paper in it and
touch [EXECUTE] key.

3)

The image skew (image registration) adjustment pattern is
printed.

4)

Check the printed black image for any skew.
Use the four cross points printed in black to measure the
squareness.
There are following two methods of checking the black image
for any skew

Method 1
Measure the distances between opposing corners of the rect-
angle print pattern and compare the two distances to check the
squareness.

Method 2
Check the squareness of the vertical and horizontal sides of
the rectangle print pattern by using A3 or 11” x 17” paper sides.
In this case, the right angle of paper to be used may not be
exact, be sure to check the right angle of paper to be used in
advance.

Method 1
Measure the length of the diagonal lines of the rectangle print
pattern.
Calculate the difference between the measured lengths C and
D of the diagonal lines.
Check to insure that the difference between C and D is in the
following range.

A

B

Diagonal

line C

Diagonal

line D

About 220mm

About 300mm

MX-4070V  ADJUSTMENTS AND SETTINGS  5 – 10

C – D = ±0.8mm
If the difference between C and D is in the above range, there
is no need to adjust.

Method 2
Fit the side of A3 or 11” x 17” paper to the long side of the rect-
angle print pattern.
Measure the slant (skew) of the vertical side for the horizontal
side of paper as shown in the figure.
If the above distance is 0.5mm or less, there is no need to
adjust.
If the above condition is not satisfied, perform the following
procedure.

5) Open the front cover, remove the waste toner box and turn the

four LSU image skew adjustment screws in the same direction
by the same amount.
For the adjustment, remove the front cover and the waste
toner box and turn the skew adjustment screw.

Skew adjustment screw rotation direction
When C is greater that Din the method 1 or there is some skew
in some skew in the direction A in the method 2, turn the screw
clockwise.
When C is smaller that D in the method 1 or there is some
skew in the direction B in the method 2, turn the screw coun-
terclockwise.

Reference of the rotation amount of the skew adjustment
screw
In case of the method1, 0.8mm / 1.5 rotations
In case of the method2, 0.5mm / 1.5 rotations 
Repeat the procedures 2)to 6).
After completion of the black image skew adjustment, go to the
procedure 7).

6) Perform the same procedure as 1) and 2).
7) Check the printed color image for any skew.

If the difference between the shift amounts on the F and R
sides is within ±1 scale of the fine adjustment check scale.
there is no need to perform the adjustment. Measure the skew
amount from the print patterns on the front and rear sides of
each color.

In each Y, M and C color print pattern printed separately in the
F side and in the R side, note the same print color pattern and
check to confirm that the F side and the R side are in the same
condition.

Rough adjustment pattern check:
Check the sub scan rough adjustment color image shift check
section on R side and the F side of each color, use the center
position of the black scale as the reference and check the bal-
ance in shifts of the color image line positions in the positive
and the negative directions. The balance in the R side must be
the same as that in the F side

Fine adjustment pattern check:
Check the square frames on the R side and the F side of each
color (normally five sections of high density can be seen)
Check the sub scanning direction position of the center area of
high density (one of the above five section). These must be on
the same position on the R side and the F side.
In this case, use the sub scan direction color image shift check
scale (five adjustment) as the reference. Visually check the
color density and make the darkest section as the center and
use it as the read value of the shift amount. Check that the dif-
ference in the center position of the dark density section is
within ±1 step. The positional relations of the front and the rear
frame of the print color patterns of a same color are compared.
There is no need that all the colors are in the same state. Com-
pare only the positional relations of color patterns of a same
color. If the above condition is not satisfied, perform the follow-
ing procedure.

R side

F side

Color image shift check

scale (Fine adjustment)

C (Image shift fine adjustment

reference frame)

Color image shift

check section

(Rough adjustment)

A-main: Main scan rough adjustment pattern

A-sub: Sub scan rough adjustment pattern

B-main: Main scan fine adjustment scale

B-sub: Sub scan fine adjustment scale

C: Main scan sub scan fine adjustment pattern

A-sub

B-sub

A-main

B-main