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MX-5141FN  MX-4140N/4141N/5140N/5141N (MAIN UNIT)  2 – 8

4)

Write down the displayed skew level. 
(Meaning of the skew level value and the adjustment proce-
dure)

* If "OK" is displayed for all items of C, M, and Y (SKEW),

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 (    )

MIAN, SUB: Difference from the previous adjustment value of
image registration.

Example: 

If 105 for this time and 103 for the previous time, 
it is displayed as 105.0 (+2.0).

SKEW: Judgment of the LSU skew adjustment result. OK or
NG.

PHASE: OPC drum phase adjustment value of the previous
time

5)

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.

NOTE: When an abnormality occurs, "ERROR" is displayed.

In this case, check each drive section and the process sec-
tion.

MAIN F

C

Registration adjustment value main scanning 
direction (Cyan laser writing position F side)

1.0 - 199.0

100

M

Registration adjustment value main scanning 
direction (Magenta laser writing position F side)

1.0 - 199.0

100

Y

Registration adjustment value main scanning 
direction (Yellow laser writing position F side)

1.0 - 199.0

100

MAIN R

C

Registration adjustment value main scanning 
direction (Cyan laser writing position R side)

1.0 - 199.0

100

M

Registration adjustment value main scanning 
direction (Magenta laser writing position R side)

1.0 - 199.0

100

Y

Registration adjustment value main scanning 
direction (Yellow laser writing position R side)

1.0 - 199.0

100

SUB

C

Registration adjustment value sub scanning direction 
(Cyan drum 

1.0 - 199.0

100

M

Registration adjustment value sub scanning direction 
(Magenta drum 

1.0 - 199.0

100

Y

Registration adjustment value sub scanning direction 
(Yellow drum 

1.0 - 199.0

100

SKEW

C

Print skew amount calculation result (Cyan)

-99.9 - 99.9

0

If the value is positive (+), "L" is displayed at the head of the 
value. If negative (?), "R" is displayed.
If the value is in the range of ?2.1 - +2.1, "(OK)" is displayed at 
the bottom of the value. In the other cases, "(NG)" is displayed.

M

Print skew amount calculation result (Magenta)

-99.9 - 99.9

0

Y

Print skew amount calculation result (Yellow)

-99.9 - 99.9

0

PHASE

OPC drum phase adjustment value

1 - 8

1

MX-5141FN  MX-4140N/4141N/5140N/5141N (MAIN UNIT)  2 – 9

MEMO: Before checking the copy color balance and density, be
sure to execute the following jobs.

* Execute the high density image correction (Process correction)

forcibly. (SIM 44-6)

* Execute the half-tone image correction forcibly. (SIM 44-26)

Make a copy of the gray test chart (UKOG-0162FCZZ) and a copy
of the servicing color test chart (UKOG-0326FCZZ/UKOG-
0326FC11), and check that they are proper.

a. Note for execution of the color balance and density check in the
color copy mode

To check the copy color balance and density, use the gray test
chart (UKOG-0162FCZZ) and the servicing color test chart
(UKOG-0326FCZZ/UKOG-0326FC11). Set the copy density
level to "3" in the Text/Printed Photo mode (Manual), and make a
copy.

At that time, all the color balance adjustments in the user adjust-
ment mode must be set to the default (center).

In addition, be sure to use the specified paper for color.

b. Note for checking the monochrome copy mode density

To check the density, use the gray test chart (UKOG-0162FCZZ).
Set the copy density level to "Manual 3" in the Text/Printed Photo
mode (Manual).

In addition, all the color balance adjustments in the user adjust-
ment mode must be set to the default (center).

In the copy density check with the gray test chart, check to insure
the following conditions.

NOTE: For the color (gray) balance, use the servicing color test

chart (UKOG-0326FCZZ/UKOG-0326FC11) to check.

In the copy color balance check with the servicing color test chart,
check to insure the following conditions.

1

2

3

4

5

6

7

8

9

10

W

SHARP   GRAY CHART

SHARP gray chart

Patch 1 is
slightly copied.

Patch 2 is copied.

(Color copy)

1

2

3

4

5

6

7

8

9

10

W

SHARP   GRAY CHART

SHARP gray chart

Patch 1 is not copied.

Patch 2 is
slightly copied.

Patch 3 is copied.

(Black-and-white copy)

Serviceman chart (Color patch section)

The densities of patches 1 - 6 of
each color are properly balanced.

Patch 7 is slightly
copied or not copied.

(Color copy)

MX-5141FN  MX-4140N/4141N/5140N/5141N (MAIN UNIT)  2 – 10

1)

There are 12 void areas.

2)

Registrations (one point for the main scanning, and one point
for the sub scanning) are not shifted.

3)

The resolution of 5.0 (5 points) can be seen.

4)

The color difference in gray balance between the F and the R
sides is not so great.

5)

There are no white and black streaks.

6)

Color texts are clearly reproduced.

7)

The background density is not so light.

MX-5141FN  MX-4140N/4141N/5140N/5141N (MAIN UNIT)  2 – 11

1)

There are 12 void areas.

2)

The resolution of 4.0 (5 points) can be seen.

3)

The density difference between the F and the R sides is not so
great.

4)

There are no white and black streaks.

5)

The background density is not so light.

6)

The black low-density gradation is copied slightly.