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MX-B381/B401  ADJUSTMENTS  4 – 23

 

Use for the reproducibility adjustment of document background
density in auto copy mode.
When there is a desire to no reproducing the document back-
ground or reproducing the low density image, adjust this.
This adjustment is required in the following cases.
* When there is a desire not to reproduce the background of the

document. When there is a desire to reproduce the low density
image of the document.

* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When there is request from the user.
1)

Enter the SIM 46-32 mode.

2)

Select the adjusting mode "COPY: OC", "COPY: RSPF" with
the scroll key.

3)

Enter the adjustment value with 10-key and press [OK] key.
When the adjustment value is increased, reproducibility of the
background and the low density image is increased. When the
adjustment value is decreased, reproducibility of the back-
ground and the low density image is decreased.

 

Use to adjust the reproducibility for the red image and the yellow
image when printing color document that included the red/yellow
image in copy mode.
This adjustment is required in the following cases.
* When there is desire to change reproducibility of yellow/red

image in case of making a copy of the color document.

* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.

1)

Enter the SIM 46-37 mode.

2)

Select the mode to be adjusted with the scroll key.

3)

Enter the adjustment value with 10-key.
When [DEFAULT] key is pressed, the value is set to the default
value.
When the adjustment values of the adjustment items A and B
are decreased, the copy density of yellow images is increased.
When the adjustment values are increased, the density is
decreased.
When the adjustment value of the adjustment item A is
decreased and the adjustment value of the adjustment item B
is increased, the copy density of red images is increased.
When the adjustment value of the adjustment item A is
increased and the adjustment value of the adjustment item B is
decreased, the copy density of red images is decreased.

4)

Press [EXECUTE] key.

5)

Press [YES] key.

6)

Make a copy in the Text/Printed Photo copy mode (manual),
and check the copy.
If a satisfactory result is not obtained, return to SIM46-37 and
change the adjustment value.
Repeat the above operation until a satisfactory result is
obtained.

 

Use for sharpness adjustment of the high density image in auto
copy mode.
This adjustment changes smoothness (asperity) in the image
shade part.
This adjustment is required in the following cases.
* When changing the sharpness of copy image in auto copy mode.

(obtain crispy image) (decreases moire)

* When there is desire to improving smoothness in the image

shade part (for decrease of asperity)

* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.

A

COPY : FOC

Copy mode (for OC)

1 - 250

196

B

COPY : RSPF

Copy mode (for RSPF)

1 - 250

196

C

SCAN : OC

Scanner mode (for OC)

1 - 250

196

D

SCAN : RSPF

Scanner mode (for RSPF)

1 - 250

196

E

FAX : OC

FAX mode (for OC)

1 - 250

196

F

FAX : RSPF

FAX mode (for RSPF)

1 - 250

196

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A

R-Ratio

Gray making setting (R)

0 - 1000

172

B

G-Ratio

Gray making setting (G)

0 - 1000

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MX-B381/B401  ADJUSTMENTS  4 – 24

1)

Enter the SIM 46-60 mode.

2)

Select the mode to be adjusted with the scroll key.

3)

Input numeric value corresponding to sharpness level (filter
process mode).
• Adjustment item A:

When selecting AUTO, filter is selected according to dot pat-
tern state automatically and adjusts sharpness.
Input small numeric value to obtain crispy image. Input large
numeric value to decrease moire.

• Adjustment item B:

Select HIGH to obtain clear images. Select SOFT to reduce
moire.

• Adjustment item C - J:

When setting ON, smoothness in the image shade part
improves by applying soft filter. (asperity decreases)

4)

Press [OK] key.

5)

Make a copy and check the copy image.

If a satisfactory result is not obtained, return to the SIM 46-60 mode
and change the adjustment value.
Repeat the above procedures until a satisfactory result is obtained.

 

If a tone gap occurs on part of high density in copy mode, or if there
is necessity to increase the density of the part of high density,
change the setting.
This setting normally not required. When, however, there are case
of following, change the setting.
* When a tone gap occurs on part of high density.
* When there is necessity to increase the density of the part of

high density.

* The carriage unit has been replaced.
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.

a. Adjustment procedure
1)

Enter the SIM 46-23 mode.

2)

Select the item A with the scroll key.

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

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.
The tone gap may occur in high density part.

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2.

A

SCREEN 
FILTER LEVEL

H

Sharpness (filter) adjustment of dot 
pattern image in auto copy mode

Strong emphasis

1

3 (Auto)

Apply to auto copy mode 
only

L

Soft emphasis

2

AUTO

Auto

3

B

AUTOMODE 
FILTER LEVEL

SOFT

Sharpness (filter) adjustment of Text/
Printed Photo/Text Document image in 
auto copy mode

SOFT

1

2 (CENTER)

Apply to auto copy mode 
(Text/Printed Photo/Text 
Document)

CENTER

CENTER

2

HIGH

HIGH

3

C

B/W COPY

OFF

Soft filter applying setting in 
monochrome copy mode

OFF

0

1 (ON)

ON

ON

1

D

COLOR 
PUSH:RGB

OFF

Soft filter applying setting to image in 
push scan color mode

OFF

0

1 (ON)

ON

ON

1

E

B/W PUSH

OFF

Soft filter applying setting to image in 
push scan monochrome mode

OFF

0

1(ON)

ON

ON

1

A

K 

(0: ENABLE

1: DISABLE)

0

K engine maximum 
density correction mode 
Enable

0 - 1

1

1

K engine maximum 
density correction mode 
Disable

B

BLACK MAX 

TARGET

Scanner target value for 
BLACK maximum density 
correction

0 - 999

500

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2.

MX-B381/B401  ADJUSTMENTS  4 – 25

3)

Press [OK] key.

NOTE: When the value of item B (MAX TARGET) is changed, the

density in the high density section is changed.
If these values is changed, be sure to execute the copy
density and gradation adjustment ADJ 12B. (Auto adjust-
ment)

 

This setting normally not required. When, however, there are case
of following, change the setting.
* When copy in RSPF mode differs from copy in document table

mode.

* When copy density in RSPF mode is low or too high.
* When the RSPF unit is replaced.
* When the RSPF unit is disassembled.
* The carriage unit has been replaced.
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
a. Adjustment procedure
1)

Enter the SIM 46-9 mode.

2)

Select the mode to be adjusted with the scroll key.
When adjusting density on low density part, select "A (COPY
LOW)". When adjusting density on high density part, select "D
(COPY HIGH)".

3)

Enter the adjustment value with 10-key.
In case of increase of image density, input large numeric
value. Or in case of diluting the image density, input small
numeric value.

4)

Press [OK] key.

5)

Make a copy in the single copy mode and check the copy.

Repeat the above procedures until a satisfactory result is obtained.

 

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

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

understanding on the automatic adjustment of the copy
density and gradation and the user's operational ability are
judged enough to execute the adjustment.
When set to ENABLE, give enough explanations on the
operating procedures, notes, and operations to the user.

This adjustment is required in the following cases.
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When the PCU PWB is replaced.
* When the EEPROM of the PCU PWB is replaced.
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 calibration (auto-
matic adjustment of copy density and gradation) is not displayed in
the user program mode.
(Auto calibration by the user (Auto copy density and gradation
adjustment))
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.

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 in the center reference.
At that time, place 5 sheets of white paper on the above patch
image (adjustment pattern).

6)

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

A

COPY : LOW

RSPF copy mode exposure 
adjustment (Low density side)

1 - 99

45

B

SCAN : LOW

RSPF scanner mode exposure 
adjustment (Low density side)

1 - 99

45

C

FAX : LOW

PSPF FAX mode exposure 
adjustment (Low density side)

1 - 99

45

D

COPY : HIGH

RSPF copy mode exposure 
adjustment (High density side)

1 - 99

48

E

SCAN : HIGH

RSPF scanner mode exposure 
adjustment (Low density side)

1 - 99

48

F

FAX : HIGH

RSPF FAX mode exposure 
adjustment (High density side)

1 - 99

48

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2.

MX-B381/B401  ADJUSTMENTS  4 – 26

 

(Requisite condition before execution of the printer density and gra-
dation adjustment)
Before execution of the printer density and gradation adjustment,
the copy density and gradation adjustment must have been com-
pleted properly.
(This adjustment is required in the following cases.)
* Basically same as when the copy density and gradation adjust-

ment is required.

* After the copy density and gradation adjustment.
(2) Printer density and gradation check
(Note)
Before checking the copy density and gradation, be sure to execute
the following procedures in advance.
* Execute the high density image correction (Process correction)

forcibly. (SIM 44-6)

* The half-tone image correction is forcibly executed. (SIM 44-26)
(Method 1)
Execute SIM 64-5 to print the print test pattern.
Set each set value to the default and press [EXECUTE] key. The
print test pattern is printed.

The print density must be changed gradually from the lighter level
to the darker level. The density changing direction must not be
reversed.

(Method 2)
Use SIM67-25 to print the adjustment sheet to check that the
adjustment is proper or not.

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 slightly printed.

 

a. General
The printer density and gradation adjustment (auto adjustment) is
used to adjust the printer density and gradation automatically by
SIM67-24 or the user program.
(When this adjustment is executed, the printer density and grada-
tion adjustments of all the print modes are revised.)

There are following two modes in the auto adjustment.
1)

Auto printer density and gradation adjustment by the service-
man (SIM 67-24 is used.)

2)

Auto printer density and gradation adjustment by the user (The
user program mode is used.)
The auto printer density and gradation adjustment by the user
is provided to reduce the number of service calls.
It is used by the user to reset the printer density and gradation
to the normal levels when any trouble occurs in the printer den-
sity and gradation.
When, however, the machine has a fatal problem or when the
machine environment is greatly changed, this function does
not work effectively.
On the other hand, the auto printer density and gradation
adjustment by the serviceman functions to recover the normal
printer density and gradation though the machine environment
is greatly changed. If the machine has a fatal problem, repair
and adjust it for obtaining the normal printer density and grada-
tion.
To perform the adjustment, the above difference must be fully
understood.

1)

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

2)

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

Q (Max)

A

B

C D

E

F

G H

I

J

K

L

M N O P

High density

Low density

Patch A or B slightly printed

The max density patch is not blurred

The patch density is identical between patches or not reversed.

The patch density is changed gradually.