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MX-M753N  ADJUSTMENTS AND SETTINGS  5 – 36

1)

The copy density and gradation adjustment must have been
completed properly.

2)

The print engine section must have been adjusted properly.

3)

When setting the adjustment pattern on the document table in
the automatic adjustment procedures, place 5 sheets of white
paper on the adjustment pattern in order to prevent back copy-
ing and adverse effects of paper wrinkles as far as possible.

c. Adjustment procedure
(Auto printer density and gradation adjustment by the serviceman)

1)

Enter the SIM 67-24 mode.

2)

Press [EXECUTE] key. (A4R (11" x 8.5"R) or A3 (11" x 17")
paper is automatically selected.)
The patch image (adjustment pattern) is printed out.

3)

Set the patch image (adjustment pattern) paper printed in pro-
cedure 2) on the document table.
Set the printed patch image (adjustment pattern) on the docu-
ment table so that the fine lines are on the left side. At that
time, place 5 sheets of white paper on the printed patch image
(adjustment pattern).

4)

Press [EXECUTE] key. 

Printer density and gradation adjustment (Automatic adjustment)
procedures flowchart (SIM67-24)

Execute ADJ12A printer density and gradation adjustment
(Automatic adjustment).

Check the result of the printer density and gradation adjustment.

Enter the SIM67-24 mode. A4R (11 x 8.5R) or
A3 (11 x 17) paper is automatically selected.

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

Check the printed check pattern for any streaks,
blurs, or other problems. (*2)

Press [OK] key.
(The initial setting of the half-tone image correction
is automatically performed.)

Use SIM67-25 to print the check
pattern, and check the density
and the gradation. (*2)

Use SIM64-5 to print the self print
check pattern, and check the printer
color balance and the density.

Execute ADJ12B printer density and
gradation adjustment
(Manual adjustment). (SIM67-25) (*1)

If satisfactory color balance and
density cannot be obtained by
ADJ12B printer density and gradation
adjustment (Manual adjustment)
(SIM67-25), check the print engine for
any troubles.

*1:

If there is any streak or blur on the
printed check pattern, check the print
engine for any troubles.

*2:

NO

YES

Set the adjustment pattern on the document table,
and press [EXECUTE] key. (The adjustment pattern
is scanned and the adjustment is performed
automatically to print the check pattern.)

Start

Completed

Cancel SIM67-24.

Are the color

balance and the density

at the satisfactory

levels?

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PRINTER CALIBRATION

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MX-M753N  ADJUSTMENTS AND SETTINGS  5 – 37

The printer density and gradation adjustment is automatically
executed and prints the check patch image.
Wait until the operation panel shown in the procedure 5) is dis-
played.

If there is any streak or unclear print on the printed check pat-
tern, check the print engine for any problems.

5)

Press [OK] key on the operation panel.

NOTE:
After pressing [OK] key, the initial setting of the half tone image
correction is started. During the operation, "NOW REGISTER-
ING THE NEW TARGET OF HALFTONE" is displayed.
After completion of the operation, "PLEASE QUIT THIS
MODE" is displayed.
Do not cancel the simulation until "PLEASE QUIT THIS
MODE" is displayed.

6)

Cancel SIM 67-24.

7)

Check the printer density and gradation.
(For details of the density and gradation check procedures,
refer to page 5-24, 25.)

 

a. General
When the printer density and gradation are not within the specified
range in the previous automatic adjustment of ADJ 10 or ADJ 12A,
or when a fine adjustment is required, or when a requests for cus-
tomization is made by the user, this adjustment is executed manu-
ally.
Execute the automatic adjustment of ADJ 12A in advance, and
then execute this adjustment for better efficiency.
b. Note for the printer density and gradation adjustment 

The print engine section must have been properly adjusted.
c. Adjustment procedure

Q (Max)

A

B

C D

E

F

G H

I

J

K

L

M N O P

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Copy density and gradation adjustment (Manual adjustment)
procedures flowchart (SIM46-16)

Start

Are the density

and the gradation at the

satisfactory levels?

Cancel SIM67-25.

Are the density and
the gradation at the

satisfactory levels?

Completed

Execute ADJ12B printer density and gradation adjustment (Manual adjustment).
(*1)

Check the result of the printer density and gradation adjustment (*1)

Use SIM67-25 to print the check
pattern, and check the density
and the gradation. (*2)

Use SIM64-5 to print the self print
check pattern, and check the printer
color balance and the density.

*1: If satisfactory density and gradation

cannot be obtained by this adjustment,
check the print engine for any troubles.

NO

YES

Enter the SIM67-25 mode. A4R (11 x 8.5R) or
A3 (11 x 17) paper is automatically selected.

Press [EXECUTE] key.
(The adjustment check pattern is printed.)

Check the printed adjustment check pattern.

Enter the adjustment
value with 10-key.

Select the adjustment
target density level with
the scroll key.

NO

YES

MX-M753N  ADJUSTMENTS AND SETTINGS  5 – 38

1)

Enter the SIM 67-25 mode.

2)

Press [EXECUTE] key. (A4R (11" x 8.5"R) or A3 (11" x 17")
paper is automatically selected.)
The patch image (adjustment pattern) is printed out.

3)

Check that the following specification is satisfied or the density
and the gradation are satisfactory.
If not, execute the following procedures.

The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed.
Patch A or B is slightly copied.
When, however, the density and the gradation are adjusted on
the request by the user, there is no need to set to the standard
density and gradation stated above.

4)

Select the adjustment point with the scroll key.

5)

Enter the adjustment value with 10-key and press [OK] key.
The adjustment value is set in the range of 0 - 255 (1 - 99).
When SIM 46-24 is used to adjust the automatic density, all the
set values of this simulation are set to 50.
To increase the density, increase the adjustment value. To
decrease the density, decrease the adjustment value.
Repeat procedures of 2) - 5) until the condition of 3) is satis-
fied.
When the overall density is low, or when the density is high
and patch A is copied, use the arrow key to adjust all the
adjustment values of A - Q (MAX) to a same level collectively.
Then, adjust each patch density individually. This is an efficient
way of adjustment.

6)

Cancel SIM 67-25.

7)

Check the printer density and gradation.
(For details of the density and gradation check procedures,
refer to page 5-24, 25.)

 

a. General
In the user program mode, the user can execute the automatic
adjustment of the printer density and gradation.
This adjustment is to set Enable/Disable of the above user opera-
tion with SIM 26-54.

NOTE: This setting must be set to ENABLE only when the user's

understanding on the automatic adjustment of the printer
density and gradation as well as the user's operational abil-
ity is judged enough to execute the adjustment.
When set to enable, operation procedures must be fully
explained to the user.

b. Setting procedure
1)

Enter the SIM 26-54 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 this is set to DISABLE, the menu of the automatic adjust-
ment of the user printer density is not displayed in the user program
mode.
(Automatic adjustment of the printer density and gradation)
1)

Enter the system setting mode.

2)

Enter the copy setting mode.

3)

Press the auto calibration key.

4)

Press [EXECUTE] key.
The patch image (adjustment pattern) is printed out.
A4R (11" x 8.5"R) paper is selected by priority. If there is no
A4R (11" x 8.5"R) paper, A3 (11" x 17") paper is selected.

5)

Set the patch image (adjustment pattern) printed in procedure
4) on the document table.
Set the patch image so that the light density area is on the left
side.
Place the adjustment pattern on the document table so that the
adjustment pattern patch faces in the sub scanning direction.
At that time, place 5 sheets of white paper on the above patch
image (adjustment pattern).

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2.

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Q (Max)

A B C D E F G H I J K L M N O P

Patch A or B is slightly copied.

P R INT E R C A L IB RAT ION

High density

Low density

The patch density is identical between patches or not reversed.
The patch density is changed gradually.

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MX-M753N  ADJUSTMENTS AND SETTINGS  5 – 39

6)

Press [EXECUTE] key.
The copy and the printer density and gradation adjustment is
automatically executed. After completion of the adjustment,
the display returns to the original operation screen.

 

This is used to set the operating conditions of density scanning
(exposure operation) of a document in the automatic copy mode,
the san mode, and the FAX mode.
When a copy with correct density is not obtained by type of docu-
ment, change the setting.
1)

Enter the SIM 46-19 mode.

2)

Set REALTIME or STOP to adjustment item AE STOP COPY.
For contents of each setting item, refer to below. Change the
setting value of "AE WIDTH" item to "FULL" or "PART", in
some cases.

NOTE: MODE1: High gamma (Improves the image contrast)

MODE2: Normal gamma
STOP: 
Reads the density of 3 - 7 mm area from leading edge of
document, decides the output image density according to
the density of that part. (The output image density is con-
stant at whole area.)
REALTIME: 
Reads the density of width of the document one by one,
decides the output image density according to the density
of each part of the document. (The output image density
may be not constant at whole area.)
AE WIDTH FULL: 
Document density reading area in auto mode is 3 - 7 mm
(leading edge of document) x Document width. No relation-
ship to PRESCAN MODE

AE WIDTH PART: 
Document density reading area in auto mode is 3 - 7 mm
(leading edge of document) x 100 mm (width). No relation-
ship to PRESCAN MODE
Operation in auto copy mode: 
When the density of the document of the read area is light,
output image density is increased by control. When the
density of the document of the read area is dark, output
image density is decreased by control.

AE_MODE

Auto exposure 
mode

MODE1, MODE2

MODE2

AE_STOP_COPY

Auto B/W exposure 
Stop (for copy)

REALTIME/STOP

STOP

AE_STOP_FAX

Auto B/W exposure 
Stop (for FAX)

ON/OFF

ON

AE_STOP_SCAN

Auto B/W exposure 
Stop (for scanner)

REALTIME/STOP

STOP

AE_FILTER

Auto exposure filter 
setting

SOFT

NORMAL

NORMAL
SHARP

AE_WIDTH

AE exposure width

FULL

FULL

PART

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3 to 7mm

3 to 7mm

100mm

100mm

3 to 7mm

Document table/DSPF mode

Document table mode

DSPF mode

AE WIDTH = FULL

AE WIDTH = PART

AE WIDTH = PART

Document density detection area