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MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 20

 

This adjustment is used to set the offset value for the automatic
color registration adjustment (ADJ 5A).
If there is any difference in color phase at the center and the four
corners of an actual print image, this adjustment may improve it.
Especially when there is any color shift at the center area, this
adjustment may improve it effectively.
This adjustment cannot eliminate color shifts in all the areas, but
average the overall color shifts.
After the automatic adjustment, use this color registration offset
adjustment to correct color shift partially, performing the adjustment
efficiently.

Before execution of this adjustment, check to confirm that the fol-
lowing adjustment has been properly made.
* ADJ 5A or ADJ 5B image skew adjustment (LSU unit)
[Kinds of adjustment values]
There are following two kinds of registration adjustment values.
• Base registration adjustment value: XXX(FRONT)/XXX(REAR)

They are manual adjustment values and automatic adjustment
values, and reflected when the automatic registration adjustment
is executed. It varies for every operation of the automatic regis-
tration adjustment.

• Offset adjustment values: OFFSETXXF/OFFSETXXR

They are the offset adjustment values added to the above base
registration adjustment values, and are not changed unless
SIM50-20 is executed to change.

1) Enter SIM50-20 mode.
2) Select the paper feed tray with A3 (11" x 17") paper in it.
3) Press [EXECUTE] key.

The color image registration check pattern is printed.

4) Check the color image registration.

There are 6 color image registration patterns in total; two on
each of the F side, the R side, and the center. Check all the
patterns to confirm that they are within the specified range.
Also check to confirm that there is not much shift in each color
image registration check pattern.

There are two kinds of adjustment: one in the main scanning
direction and the other in the sub scanning direction. The verti-
cal direction in the above figure is that in the main scanning
direction, and the horizontal direction is that in the sub scan-
ning direction.

There are also two kinds of adjustments: the rough adjustment and
the fine adjustment. Perform the rough adjustment then perform the
fine adjustment deliberately.
For the main scan direction image registration, the offset on the F
side, the R side, and at the center is independently adjusted.
If there is a difference in the sub scanning direction image registra-
tion between the F and R sides, perform the skew adjustment (ADJ
5A).

Check the print patterns of the rough adjustment and the fine
adjustment of 18 check patterns.
How to check the rough adjustment pattern and input of the
adjustment value:
Visually check the color image registration check section, use the
center position of the black scale as the reference, and check the
shift balance in the positive and negative directions at the color
image line position.
Use the center position of the black scale as the reference, and
check that the color image line is symmetrical in the positive side
and the negative side.
If shift is in the arrow mark X1 and Y1, increase the adjustment
value. If shift is in the arrow mark X2 and Y2, decrease the adjust-
ment value.
The reference arrow on the check pattern faces the positive direc-
tion.
(Reference adjustment value)
1 scale/10 (When the set value is changed by 10, shift is made by 1
scale.)
How to check the fine adjustment pattern and input of the
adjustment value:
Check to confirm that the darkest spot (one of 5 spots seen nor-
mally) is within the center area of the image registration adjustment
reference frame in the square frame.
At that time, use the color image registration check scale (fine
adjustment) as the reference.
Visually check and consider the darkest section of color density as
the center, and measure the shift from it.
Check to confirm that the center of the dark density section is within
 1 step.
(If the fine adjustment print pattern is in the range of 0 

 1 for the

fine adjustment reference pattern scale, there is no need to adjust.)
If shift is in the arrow mark X1 and Y1, increase the adjustment
value. If shift is in the arrow mark X2 and Y2, decrease the adjust-
ment value.

Rear pattern

Center pattern

Front pattern

Reference arrow mark

A-sub

B-sub

B-main

A-main

X1

X2

Y2

Y1

Color image shift
check section
(Rough adjustment)

A-main: Main scan rough adjustment pattern
A-sub: Sub scan rough adjustment pattern
B-main: Main scan fine adjustment scale
B-sub: Sub scan fine adjustment scale
C: Main scan sub scan fine adjustment pattern

Color image shift check
scale (Fine adjustment)

C (Image shift fine adjustment
reference frame)

MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 21

(Reference adjustment value)
1 scale/1 (When the set value is changed by 1, shift is made by 1
scale.)

If there is a considerable difference in color shift in the square and
at the center area, perform the adjustment.
Select an adjustment item (OFF SET X F / OFF SET X R / OFF
SET X S), and change the adjustment value to adjust.
OFF SET X F: F side main scanning direction registration offset set
value (The color shift on the F side and at the center area is
changed.)
OFF SET X D: R side main scanning direction registration offset set
value (The color shift on the R side and at the center area is
changed.)
OFF SET X S: Sub scanning direction registration offset set value
(Color is shifted to the sub scanning direction overall.)

When the adjustment value of OFF SET X F and OFF SET X R are
changed, the color at the center area will be affected. Consider this
when executing the adjustment.
(Adjustment conditions and method)
To adjust evenly overall, adjust so that the color shifts on the F side,
the R aide and at the center are of the same level.
To adjust with the center area most focused, adjust so that the color
shift at the center becomes smaller than that on the F side and the
R side.

When the offset adjustment value is 0, if the color registration
adjustment (automatic adjustment) is performed, the color shift on
the F side and that on the R side are automatically adjusted to be
smaller than that on the center area.

 

This adjustment must be performed in the following cases:
* When the scanner (reading) section is disassembled.
* When the copy image is distorted.

 

Before execution of this adjustment, remove the document table
glass.
1)

Remove the lamp unit, and then loosen the screws which are
fixing the scanner unit A and the drive wire. Release the scan-
ner unit A from the drive wire.

A

CYAN
(FRONT)

Image registration adjustment 
value (Main scanning 
direction) (Cyan) (F side)

1 - 199

100

B

CYAN
(REAR)

Image registration adjustment 
value (Main scanning 
direction) (Cyan) (R side)

1 - 199

100

C

MAGENTA
(FRONT)

Image registration adjustment 
value (Main scanning 
direction) (Magenta) (F side)

1 - 199

100

D

MAGENTA
(REAR)

Image registration adjustment 
value (Main scanning 
direction) (Magenta) (R side)

1 - 199

100

E

YELLOW
(FRONT)

Image registration adjustment 
value (Main scanning 
direction) (Yellow) (F side)

1 - 199

100

F

YELLOW
(REAR)

Image registration adjustment 
value (Main scanning 
direction) (Yellow) (R side)

1 - 199

100

G

CYAN
(SUB)

Image registration adjustment 
value (Sub scanning 
direction) (Cyan)

1 - 199

100

H

MAGENTA
(SUB)

Image registration adjustment 
value (Sub scanning 
direction) (Magenta)

1 - 199

100

I

YELLOW
(SUB)

Image registration adjustment 
value (Sub scanning 
direction) (Yellow)

1 - 199

100

J

OFFSET 
CF

Image registration offset 
adjustment value (Main 
scanning direction) (Cyan) 
(F side)

1 - 199

100

K

OFFSET 
CR

Image registration offset 
adjustment value (Main 
scanning direction) (Cyan) 
(R side)

1 - 199

100

L

OFFSET 
MF

Image registration offset 
adjustment value (Main 
scanning direction) (Magenta) 
(F side)

1 - 199

100

M

OFFSET 
MR

Image registration offset 
adjustment value (Main 
scanning direction) (Magenta) 
(R side)

1 - 199

100

N

OFFSET 
YF

Image registration offset 
adjustment value (Main 
scanning direction) (Yellow) 
(F side)

1 - 199

100

O

OFFSET 
YR

Image registration offset 
adjustment value (Main 
scanning direction) (Yellow) 
(R side)

1 - 199

100

P

OFFSET 
CS

Image registration offset 
adjustment value (Sub 
scanning direction) (Cyan)

1 - 199

100

Q

OFFSET 
MS

Image registration offset 
adjustment value (Sub 
scanning direction) (Magenta)

1 - 199

100

R

OFFSET 
YS

Image registration offset 
adjustment value (Sub 
scanning direction) (Yellow)

1 - 199

100

MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 22

2) Turn the scanner drive pulley manually and shift the scanner

unit B to bring it into contact with the stopper.
When the scanner unit B is in contact with the two stoppers on
the front and the rear frames simultaneously, the parallelism is
proper.

If this requirement is not met, do the following steps.

3) Loosen the fixing screw of the pulley angle on the front frame

side of the scanner unit B.

4) Adjust the position of the pulley angle on the front frame side

of the scanner unit B so that it is in contact with two stoppers
on the front and the rear frames simultaneously.

5) Fix the pulley angle on the front frame side of the scanner unit

B.
If a satisfactory result is not obtained from the above proce-
dures, perform the following procedures.
Loosen the fixing screw of the scanner unit drive pulley which
is not in contact.
Without moving the scanner unit drive shaft, turn the scanner
unit drive pulley manually and adjust so that the scanner unit B
is in contact with both stoppers on the front frame and the rear
frame simultaneously. (Change the relative position of the
scanner unit drive pulley and the drive shaft.) Fix the scanner
unit drive pulley fixing screw.

6)

With the scanner unit B in contact with both stoppers, fit the
edge of the scanner unit A with the right edge of the frame, and
fix the scanner unit A with the fixing screw.

 

1)

Make a test chart on A3 (11" x 17") paper as shown below.
(Draw a rectangular with four right angles.)

L

L

L = 10mm

L

L

MX-3610N  ADJUSTMENTS AND SETTINGS  4 – 23

2) Set the test chart prepared in the procedure 1) on the docu-

ment table. (Shift the test chart edge 30mm from the reference
position as shown below.) With the document cover open,
make a copy on A3 (11" x 17") paper.

3) Check for distortion in the sub scanning direction.

If La = Lb, there is no distortion.

If there is any distortion in the sub scanning direction, perform
the following procedures.

4) Loosen either one of the fixing screws of the scanner unit drive

pulley. (Either one on the front frame or on the rear frame will
do.)

5) Without moving the scanner unit drive shaft, manually turn the

scanner unit drive pulley to change the parallelism of the scan-
ner unit A and B. (Change the relative position of the scanner
unit drive pulley and the drive shaft.)

6)

Tighten the scanner unit drive pulley fixing screw.

Repeat the procedures 2) - 6) until the condition of the procedure 3)
is satisfied.
If the distortion in the sub scanning direction cannot be deleted with
the above procedures, perform ADJ 4D Scan image distortion
adjustment (Whole scanner unit).

 

1)

Make a test chart on A3 (11" x 17") paper as shown below.
(Draw a rectangular with four right angles.)

2)

Set the test chart prepared in the procedure 1) on the docu-
ment table, and make a copy on A3 (11" x 17") paper.

3)

Check for distortion in the main scanning direction.
If the four angles of the rectangle of the copy image are right
angles, it is judged that there is no distortion. (The work is
completed.)

If there is any distortion in the main scanning direction, perform
the following procedure.

4)

Check the difference (distortion balance) between left-hand
and right-hand side images distortions.

If Lc = Ld, the distortion on the left is equal to that on the right.
(The distortions are balanced.)
If the above condition is satisfied, go to the procedure 6).
If not, perform the following procedures.

30mm

La

Lb

L

L

L = 10mm

L

L

Lc

Ld

Copy A

Lc

Ld

Copy B

There is no difference
between the distortion on
the right and that on the left.

Lc

Ld

Lc

Ld

There is some difference
between the distortion on
the right and that on the left.