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MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 72

6) Check the color balance and density.

(Refer to the item of the printer color balance and density
check.)
NOTE:
If the color balance is customized, use SIM 67-27 to register
the color balance as the service target.
If the color balance is not customized, this procedure is not
required.
If the customized color balance is registered as the service tar-
get, the automatic color balance adjustment can be made in
the next color balance adjustment.

 

a. General
This adjustment is used to execute the fine adjustment in each
mode only when a satisfactory image quality is not obtained by the
basic adjustments ADJ9E (1) and ADJ9E (2) or there is a request
from the user. Normally there is no need to execute this adjust-
ment.
This must be well understood for execution of the adjustment.

 

This adjustment is used to adjust the image density in the low den-
sity area in the printer mode.
Adjust to reproduction setting of the low density image.
This adjustment is required in the following cases.
* When it is required not to reproduce images in the low density

section, or to reproduce low-density images.

* When there is request from the user.
1) Enter the SIM 67-36 mode.

2)

Enter the adjustment value and press the [OK] key.
In case of increase of the image density on low density part,
increase the adjustment value. For diluting the image density
on low density part, decrease the adjustment value.
 

 

When a tone gap is generated in the high density section in the
printer mode, the setting is changed to lower the density in the high
density section.
This setting is normally not required, however, in the following
cases, a change of setting must be made.
* When a tone gap occurs on part of high density.
* To lower the density in the high density section.

a. Adjustment procedure
1)

Enter the SIM 67-34 mode.

2)

Select the item A, B with the scroll key.

OK 

 

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10-key

A

CMY 

(0: ENABLE 
1:DISABLE)

0

CMY engine maximum 
density correction mode 
Enable

0 - 1

0

1

CMY engine maximum 
density correction mode 
Disable

B

K 

(0:ENABLE

 1: DISABLE)

0

K engine maximum 
density correction mode 
Enable

0 - 1

1

1

K engine maximum 
density correction mode 
Disable

C

CYAN  MAX 

TARGET

Scanner target value for 
CYAN maximum density 
correction

0 - 999

500

OK 

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2.

MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 73

* If a tone gap occurs on part of high density, set 0 to item A and B

The density of high density part decreases. However, the tone
gap is better.

* In case of more increase of the density on high density part, set 1

to item A and B.
The tone gap may occur in high density part.

NOTE: If the setting values of item C, D, E and F are changed,

density of the high density part is changed.
When these values are changed, be sure to perform the
printer color balance and density adjustment. (Automatic
adjustment)
 

 

a. General
This adjustment is used to adjust the color balance and the density
in the monochrome mode, the heavy paper mode, and the gloss
paper mode.
This simulation is used to improve image quality in these modes
and images.

b. Adjustment procedures
1) Enter the SIM67-54 mode.
2) Press [EXECUTE] key.

A4/11" x 8.5" or A3/11" x 17" paper is automatically selected.
The color patch image (adjustment pattern) is printed out.

3) Set the color patch image (adjustment pattern) printed in the

procedure 2) on the document table so that the thin lines on
the printed color patch image (adjustment pattern) are on the
left side. Place 5 sheets of white paper on the printed color
patch image (adjustment pattern).

4)

Press [EXECUTE] key.
The color balance adjustment is automatically performed.
The adjustment pattern is printed out. Check it for any abnor-
mality.

5)

Press [OK] key.
The list of the adjustment items (for each dither) is displayed.

6)

Select an adjustment item (for each dither).

7)

Press [EXECUTE] key.
A4/11" x 8.5" or A3/11" x 17" paper is automatically selected.
The color patch image (adjustment pattern) is printed out.

8)

Set the color patch image (adjustment pattern) printed in the
procedure 7) on the document table so that the thin lines on
the printed color patch image (adjustment pattern) are on the
left side. Place 5 sheets of white paper on the printed color
patch image (adjustment pattern).

9)

Press [EXECUTE] key.
The color balance adjustment is automatically performed, and
the machine goes to the state of procedure 6).

10) When [OK] key is pressed, the adjustment result is registered

and the adjustment mode is terminated. When [EXECUTE]
key is pressed, the adjustment result is registered and the
screen is shifted to the other item (Mode/Image) select menu.

D

MAGENTA MAX 

TARGET

Scanner target value for 
MAGENTA maximum density 
correction

0 - 999

500

E

YELLOW MAX 

TARGET

Scanner target value for 
YELLOW maximum density 
correction

0 - 999

500

F

BLACK  MAX 

TARGET

Scanner target value for 
BLACK maximum density 
correction

0 - 999

500

1200DPI_1BIT

SCREEN5 (1200dpi 1bit Photo)
SCREEN6 (1200dpi 1bit Graphics)

600DPI_1BIT

SCREEN1 (600dpi 1bit Photo)
SCREEN2 (600dpi 1bit Graphics)

B/W

SCREEN7 (600dpi 1bit)
SCREEN8 (600dpi 4bit)
SCREEN9 (1200dpi 1bit)
Printer B/W toner save automatic 
density correction amount

SCREEN11(PCL B/W 600dpi 1bit 
Graphics)
SCREEN12(PCL B/W 600dpi 4bit 
Graphics)
SCREEN13(PCL B/W 1200dpi 1bit 
Graphics)

GLOSSPAPER

SCREEN10 (Glossy paper screen)

4BIT_GRAPHICS

SCREEN4 (600dpi 4bit Graphics)

DOT_SCREEN1

SCREEN14(PS DotScreen1)

DOT_SCREEN2

SCREEN15(PS DotScreen2)

DOT_SCREEN1_BW

SCREEN16(PS DotScreen1 BW)

DOT_SCREEN2_BW

SCREEN17(PS DotScreen2 BW)

MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 74

To execute the adjustment of the other item (Mode/Image),
press [EXECUTE] key.
After completion of all the adjustments of the items (Mode/
Image), press [OK] key, and the adjustment results are regis-
tered.

11) Make a print, and check the print image quality.

(Refer to the item of the printer color balance and density
check.)

NOTE: Use SIM67-52 to reset the adjustment values to the default

values.

MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 75

 

a. General
In the user program mode, the user can execute the auto color cal-
ibration (auto adjustment of the printer color balance and density).
This adjustment is to set Enable/Disable of the above user opera-
tion with SIM 26-53.

CAUTION: This setting must be set to ENABLE only when the

user's understanding on the automatic adjustment of
the copy color balance and density and the user's oper-
ational ability are judged enough to execute the adjust-
ment.
When set to enable, operation procedures must be fully
explained to the user.

b. Setting procedure
1) Enter the SIM 26-53 mode.

2) Select ENABLE or DISABLE with 10-key.

When disabling, set to "0" (NO). When enabling, set to "1"
(Yes).

3) Press [OK] key.
When set to DISABLE, the menu of the user auto color calibration
(automatic adjustment of printer color balance and density) is not
displayed in the user program mode.

CAUTION: This adjustment is based on the service target color bal-

ance set with SIM 67-27 or SIM 67-28. If, therefore, the
above settings are not properly performed, this adjust-
ment cannot be made properly.

1)

Enter the system setting mode.

2)

Enter the printer setting mode.

3)

Press the auto color calibration key.

4)

Press [EXECUTE] key.
The color patch image (adjustment pattern) is printed out.

5)

Set the color patch image (adjustment pattern) printed in pro-
cedure 4) on the document table.
Set the patch image so that the thin line is on the left side as
shown in the figure.
At that time, place 5 sheets of white paper on the above color
patch image (adjustment pattern).

6)

Press [EXECUTE] key, and the printer color balance adjust-
ment is executed automatically. 
The message, "Will you go on to the copy color balance
adjustment?" is displayed.
To execute the copy color balance adjustment successively,
perform the procedures same as the above.

 

This adjustment must be performed in the following cases:
* The manual paper feed tray section has been disassembled.
* The manual paper feed tray unit has been replaced.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.

OK

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