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MX-B381/B401  ADJUSTMENTS  4 – 15

3)

Enter the adjustment value of SIDE1/SIDE2 with 10-key, and
press [OK] key.
Adjust so that the paper lead edge is aligned with the pre-
sumed image lead edge.
SIDE1: 

Front surface document lead edge scan position adjustment

SIDE2: 

Back surface document lead edge scan position adjustment

(When the adjustment value is increased, the print image posi-
tion is shifted to the delaying direction for the paper.)
(Change for change in the set value: 0.1mm/step)

Perform the procedures of 2) - 3) until a satisfactory result is
obtained.

1)

Make a duplex copy in 100% in the RSPF mode. Check to
confirm that the rear edge image loss is 2.0 - 5.0mm on the
front surface and the back surface.

If the above condition is not satisfied, perform the following
procedure.

2)

Enter the adjustment value of TRAIL EDGE (SIDE1/SIDE2)
with 10-key, and press [OK] key.
TRAIL EDGE (SIDE 1): Rear edge image loss adjustment
value (Front surface)
TRAIL EDGE (SIDE 2): Rear edge image loss adjustment
value (Back surface)
(When the adjustment value is increased, the rear edge image
loss is increased.)
(Change for change in the set value: 0.1mm/step)

Perform the procedures of 1) - 2) until a satisfactory result is
obtained.

1)

Make a duplex copy in 100% in the RSPF mode. Check to
confirm that the image losses on the front frame side and the
rear frame side are 2.0 

 2.0mm on the front surface and the

back surface.

If the above condition is not satisfied, perform the following
procedure.

2)

Enter the adjustment value of FRONT/REAR (SIDE 1)/
FRONT/REAR (SIDE 2), and press [OK] key.
FRONT/REAR (SIDE 1) Front/Rear image loss adjustment
value (Front surface)
FRONT/REAR (SIDE 2) Front/Rear image loss adjustment
value (Back surface)
(When the adjustment value is increased, the front/rear image
loss is increased.)
(Change for change in the adjustment value: 0.1mm/step)

Perform the procedures of 1) - 2) until a satisfactory result is
obtained.

 

This adjustment is needed in the following situations:
* When the registration roller section is disassembled.
* When the LSU is replaced or removed.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.

NOTE: This adjustment is performed by the user to increase the

lead edge image position (standard value: 3mm).

1)

Enter the simulation 50-5 mode.

2)

Select the set item K with the scroll key, and enter the value
corresponding to the paper feed tray with A4 (11" x 8.5") paper
in it.

Paper rear edge

Copy image

Image loss 2.0 - 5.0mm

Paper F

side edge

Paper R

side edge

Copy image

Copy image

Image loss

2.0 2.0mm

Image loss

2.0 2.0mm

A

DEN-C

Printer lead edge 
image position 
adjustment

1 - 99

30

B

DEN-B

Rear edge void area 
adjustment

1 - 99

30

C

FRONT/REAR

FRONT/REAR void 
area adjustment

1 - 99

30

D

DENB-MFT

Manual feed rear edge 
void area adjustment 
correction value

1 - 99

50

E

DENB-CS1

Tray 1 rear edge void 
area adjustment 
correction value

1 - 99

50

F

DENB-CS2

Tray 2 rear edge void 
area adjustment 
correction value

1 - 99

50

G

DENB-CS3

Tray 3 rear edge void 
area adjustment 
correction value

1 - 99

50

H

DENB-CS4

Tray 4 rear edge void 
area adjustment 
correction value

1 - 99

50

I

DENB-ADU

ADU rear edge void 
area adjustment 
correction value

1 - 99

50

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2.

MX-B381/B401  ADJUSTMENTS  4 – 16

3)

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

4)

Measure the distance from the paper lead edge the adjustment
pattern to the image lead edge.
Standard adjustment value: 3.0 

 2.0mm

If an adjustment is required, perform the following procedures.

5)

Select the adjustment target of the paper feed mode adjust-
ment item DENC with the scroll key.

6)

Enter the adjustment value and press [OK] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the distance from the
paper lead edge to the image lead edge is increased. When
the adjustment value is decreased, the distance is decreased.
When the set value is changed by 1, the distance is changed
by about 0.1mm.
Perform the procedures 4) - 6) until a satisfactory result is
obtained.

 

* After completion of this adjustment, the printer density and gra-

dation adjustment must be executed.

* Requisite conditions before execution of the copy density and

gradation adjustment
Before execution of the copy density and gradation adjustment,
check to insure that the adjustments which affect the copy den-
sity adjustment have been completed.
The importance levels of them are shown below.

(The following items affect the copy density and gradation
adjustment, and must be checked and adjusted before execu-
tion of the image quality adjustments.)
1)

The following adjustment items must be adjusted properly.

(The following items affect the copy density and gradation
adjustment, but it is not required to adjust them frequently.
When, however, a trouble occurs, check and adjust them.)
1)

 The following items must be adjusted properly.

(Relationship between the servicing job contents and the copy
density and gradation adjustment)
Note that the preliminary jobs before execution of the copy density
and gradation adjustment depend on the machine status and the
servicing conditions.
Follow the flowchart of the copy density and gradation adjustment
procedures depending on the actual conditions.
There are following four, major cases.
1)

When installing

2)

When a periodic maintenance is performed.

3)

When a repair, an inspection, or a maintenance is performed.
(When a consumable part is replaced.)

4)

When an installation, a repair, or inspection is performed.
(Without replacement of a consumable part)

(2) Copy density and gradation check
(Note)
Before checking the copy density and gradation, 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)
(Method)
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.
• Note for checking the copy mode density and gradation

To check the density and gradation, 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 adjustments in the user adjustment mode must
be set to the default (center).

[Check with the gray test chart (UKOG-0162FCZZ)]
In the copy density check with the gray test chart, check to insure
the following conditions.

J

MULTI COUNT

Number of print

1 - 999

1

K

PAPER

MFT

Tray 
selection

Manual 
paper feed

1 - 5

1

2 (CS1)

CS1

Tray 1

2

CS2

Tray 2

3

CS3

Tray 3

4

CS4

Tray 4

5

L

DUPLEX

YES

Duplex 
print 
selection

Yes

0 - 1

0

1 (NO)

NO

No

1

ADJ 

2

Image density 
sensor adjustment

ADJ 

2A

Image density sensor 
adjustment

44-2

3.0 2.0mm

ADJ 

1

Adjusting high 
voltage values

ADJ 

1A

Adjust the main charger 
grid voltage

8-2

ADJ 

1B

Adjust the developing 
bias voltage

8-1

ADJ 

1C

Transfer voltage 
adjustment

8-6

ADJ 

12

CCD gamma adjustment (CCD calibration)

63-3

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.

MX-B381/B401  ADJUSTMENTS  4 – 17

[Check with the servicing color test chart (UKOG-0326FCZZ/
UKOG-0326FC11)]
In the copy check with the servicing color test chart, check to insure
the following conditions.

 

This adjustment is needed in the following situations:
* When the carriage unit is replaced.
* When a U2 trouble is occurred.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
(1) Note before adjustment
1)

Check that the table glass, No. 1, 2, 3 mirrors, and the lens
surface are free from dirt and dust.
 (If there is some dust and dirt, wipe and clean with alcohol.)

2)

Check to confirm that the patches in BK1 and BK2 arrays of
the SIT chart (UKOG-0280FCZZ or UKOG-0280FCZ1) are
free from dirt and scratches.
If they are dirty, clean them.
If they are scratched or streaked, replace with new one.

(2) Adjustment procedures
1)

Set the SIT chart (UKOG-0280FCZZ or UKOG-0280FCZ1) to
the center reference position on the left rear frame side of the
document table.
Set the chart so that the lighter density side of the patch is on
the left side.

If the SIT chart is not available, execute SIM 63-5 to set the
CCD gamma to the default. In this case, however, the adjust-
ment accuracy is lower when compared with the adjustment
method using the SIT chart.

NOTE: Check to insure that the SIT chart (UKOG-0280FCZZ or

UKOG-0280FCZ1) is in close contact with the document
table.
UKOG-0280FCZZ is equivalent to UKOG-0280FCZ1.

2)

Enter the SIM 63-3 mode and press [EXECUTE] key.
The automatic operation is started. During the adjustment,
[EXECUTE] is highlighted. After completion of the adjustment,
[EXECUTE] returns to the normal display.

NOTE: Since the SIT chart (UKOG-0280FCZZ or UKOG-0280FC

Z1) is easily discolored by sunlight (especially ultraviolet
rays) and humidity and temperature, put it in a bag (such
as a dark file) and store in a dark place of low temperature
and low humidity.

 

This adjustment is needed in the following situations:
* When a consumable part (developer, OPC drum, transfer belt) is

replaced.

* The carriage unit has been replaced.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* The scanner control PWB has been replaced.
* The EEPROM on the scanner control PWB has been replaced.
a. General
The copy density and gradation adjustment (auto adjustment) is
used to adjust the copy density and gradation automatically by
SIM46-24 or the user program.
(When this adjustment is executed, the density and gradation
adjustments of all the copy modes are revised.)

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

Auto copy density and gradation adjustment by the service-
man (SIM 46-24 is used.)

2)

Auto copy density and gradation adjustment by the user (The
user program mode is used.)
The auto adjustment by the user is provided to reduce the
number of service calls.
It is used by the user to reset the copy density and gradation to
the normal levels when any trouble occurs in the copy density
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 adjustment by the serviceman
functions to recover the normal copy 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 copy density and gradation.
To perform the adjustment, the above difference must be fully
understood.

Serviceman chart (Color patch section)

Patch 7 is slightly copied or
not copied.

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MX-B381/B401  ADJUSTMENTS  4 – 18

1)

The print engine section must have been adjusted properly.

2)

The CCD gamma adjustment must have been adjusted prop-
erly.

3)

When setting the adjustment pattern on the document table in
the copy density and gradation automatic adjustment proce-
dures, 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.

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

1)

Enter the SIM 46-24 mode.

YES

NO

Flowchart of the auto copy density and gradation adjustment by the serviceman (SIM46-24)

Start

Execute ADJ12B (Auto copy density and gradation adjustment).

Enter the SIM46-24 mode, and select A4R (11 x 8.5"R) paper.

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

Set the adjustment pattern on the document table.
Press [EXECUTE] key.
(The adjustment pattern is scanned, and the adjustment is automati-
cally performed to print the check pattern.)

Check the printed check pattern for any streaks or unclear copy.
The adjustment check pattern of the copy mode is printed out. (*1)

Press [OK] key, and the initial setting of the half tone image correction
is automatically performed.

Cancel SIM46-24

Check the density adjustment result.

Use the test chart (UKOG-0162FCZZ) or
(UKOG-0326FCZZ/UKOG-0326FC11) to make a copy in the
Text/Printed Photo mode, and check the density.

Use SIM46-21 to print the check pattern, and check the density.

Are the density at the
satisfactory level?

End

Execute ADJ12C (Manual copy density and
gradation adjustment). (SIM46-21).

*1:
If there is any streak or unclear copy on the
printed check pattern, check the print engine
for any problems.

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