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MX-M905  ADJUSTMENTS  5 – 73

1)

Enter the SIM 67-24 mode.

2)

Press [EXECUTE] key. (A4/11" x 8.5" or A3/11" x 17" paper is
automatically selected.)

The gray patch image (adjustment pattern) is printed out.

3)

Set the gray patch image (adjustment pattern) paper printed in
procedure 2) on the document table.

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

4)

Select [FACTORY] key, and press [EXECUTE] key.

When the gray balance is customized with the manual gray
balance adjustment (SIM 67-25) according to the user's
request and the gray balance is registered as the service tar-
get with SIM 67-27, if the gray balance is adjusted to that gray
balance, select the service target.

The copy gray balance adjustment is automatically executed
and prints the gray balance check patch image. Wait until the
operation panel shown in the procedure 5) is displayed.

5)

Press [OK] key on the operation panel.

NOTE:

After pressing [OK] key, the initial setting of the halftone image
correction is started. During the operation, "NOW REGISTER-
ING THE NEW TARGET OF HALFTONE" is displayed. This
operation takes several minutes.

After completion of the operation, "PLEASE QUIT THIS
MODE" is displayed.

Do not cancel the simulation until "PLEASE QUIT THIS
MODE" is displayed.

After completion of the operation, the simulation is canceled.

6)

Check the gray balance and density.

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

If a satisfactory result on the gray balance and the density is
not obtained with the automatic adjustment, execute the man-
ual adjustment (SIM 67-25) (ADJ 11E (2)).

Also when the service target is selected in procedure 4) to exe-
cute the automatic adjustment and a satisfactory result is not
obtained, perform the manual gray balance adjustment (ADJ
11E (2)).

If the gray balance or density is not in the satisfactory level even
after execution of the automatic and manual adjustments, there
may be another cause.

Troubleshoot the cause, repair or perform necessary works, and
repeat the adjustment from the beginning.
 

MX-M905  ADJUSTMENTS  5 – 74

 

The gray balance adjustment (Manual adjustment) is used to adjust
the printer density. This is used at the following situation. When the
result of auto adjustment described above is not existing within the
range of reference. When a fine adjustment is required. When
there is request from the user for changing (customizing) the gray
balance.

In this manual adjustment, adjust only the gray patch which could
not adjusted properly in the automatic adjustment.

If the gray balance is improper, execute the automatic gray balance
adjustment in advance, and execute this adjustment for better effi-
ciency.

1)

Enter the SIM 67-25 mode.

2)

Press [EXECUTE] key. (A4/11" x 8.5" or A3/11" x 17" paper is
automatically selected.)

The gray balance adjustment pattern is printed.

3)

Check that the following specification is satisfied or the gray
balance is 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 very slightly copied.

When, however, the gray balance is adjusted according to a
request from the user, there is no need to set to the standard
gray balance stated above.

4)

Enter the adjustment value with 10-key and press [OK] key.

The adjustment value is set in the range of (1 - 999). When
SIM 67-24 is used to adjust the automatic gray balance and
density, all the set values of this simulation are set to 500.

To increase the density, increase the adjustment value. To
decrease the density, decrease the adjustment value.

Repeat procedures of 2) - 4) 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.

5)

Check the gray balance and density.

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

NOTE:

If the gray balance is customized, use SIM 67-27 to register
the gray balance as the service target.

If the gray balance is not customized, this procedure is not
required.

If the customized gray balance is registered as the service tar-
get, the automatic gray balance adjustment can be made in
the next gray balance adjustment.

YES

NO

Printer gray balance and density adjustment (Manual adjustment) procedure 
flowchart (SIM67-25)

Start

Execute ADJ11E(2) (Printer gray balance and density 
adjustment (Manual adjustment). (*1)

Enter the SIM67-25 mode, and select A4 
(11" x 8.5") paper. (Automatic selection.)

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

Select a target adjustment density level with the 
scroll key.

Enter the adjustment value with 10-key. 

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

Are the gray balance 
and density at the sati-
sfactory level?

Cancel the SIM67-25 mode.

End

Check the gray balance and density in the gray 
balance check pattern.

*1: 
If satisfactory gray balance and density are not 
obtained with the adjustment, check the print 
engine for any problems. 

YES

NO

Are the gray balance and 
density at the satisfactory 
level?

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

Refer to the printed adjustment check pattern.

Check the self print check pattern to check the printer gray balance and 
density adjustment. 

Set the SERVICE target for the automatic printer gray balance 
adjustment. (SIM67-27)

Q

O P

N

M

L

K

J

I

H

G

F

E

D

C

B

A

Bk

3) 

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

1) The max. density section is not blurred.

2) Patch A or B is very slightly copied.

High density

Low density

MX-M905  ADJUSTMENTS  5 – 75

 

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 ADJ 11E (1) and ADJ 11E (2) or there is a
request from the user. Normally there is no need to execute this
adjustment.

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.

1)

Enter the SIM 67-34 mode.

2)

Select the item A, B with the scroll key.

* 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 gray balance and density adjustment. (Automatic
adjustment)

 

This adjustment is used to adjust the gray 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.

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 patch image (adjustment pattern) is printed out.

3)

Set the patch image (adjustment pattern) printed in the proce-
dure 2) on the document table so that the thin lines on the
printed patch image (adjustment pattern) are on the left side.
Place 5 sheets of white paper on the printed patch image
(adjustment pattern).

A

K(0:ENABLE 
1:DISABLE)

0

K engine highest density 
correction mode: Enable

0 - 1

1

1

K engine highest density 
correction mode: Disable 

B

BLACK  MAX 
TARGET

Scanner target value for BLACK 
maximum density correction

0 - 999

500

C

RATIO LOW

High density correction blend 
ratio (LOW)(1/100)

0 - 100

33

D

RATIO HIGH

High density correction blend 
ratio (HIGH)(1/100)

0 - 100

0

E

DITHER 
THRESHOLD

Dither threshold (LOW)

0 - 255

250

F

SLOPE 
THRESHOLD

Slope threshold (HIGH)(1/100)

100 - 

500

400

MX-M905  ADJUSTMENTS  5 – 76

4)

Press [EXECUTE] key.

The gray 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 patch image (adjustment pattern) is printed out.

8)

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

9)

Press [EXECUTE] key.

The gray 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.

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 gray balance and density
check.)

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

values.

HEAVY PAPER

Adjustment for heavy paper and that for gloss paper

4BIT_HIGH

For adjustments for each screen of 600/4bit HIGH 
screen

4BIT_SHIGH

For adjustments for each screen of 600/4bit SHIGH 
screen

1200DPI_LOW

For adjustments for each screen of 1200/1bit LOW 
screen

1200DPI_HIGH

For adjustments for each screen of 1200/1bit HIGH 
screen

1200DPI_SHIGH

For adjustments for each screen of 1200/1bit SHIGH 
screen