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MX-7000N  ADJUSTMENTS  6 – 21

(Example)

NOTE: If either of front or rear adjustment value is changed, the

other adjustment print pattern position may be varied. Be
careful of that.

 

1)

Enter SIM50-21 mode.

2)

Select the paper feed tray with A4 (11 x 8.5) or A3 (11 x 17)
paper in it by changing the value of set item H.

3)

Press [EXECUTE] key.
The sub scanning direction image registration adjustment pat-
tern is printed.

A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range

Previous value before adjustment

New adjustment value

A: 100

A: 93 (= 100 – 7)

B: 112

B: 100 (= 112 – 12)

C: 95

C: 96 (= 95 + 1)

D: 98

D: 109 (= 98 + 11)

E: 102

E: 109 (= 102 + 7)

F: 96

F: 118 (= 96 + 22)

A : 100

;

CYAN

B : 100

;

MAGENTA

C : 100

;

YELLOW

D :

1

;

MULTICOUNT

A:

SIMULATION NO.50-21

REGISTRATION ADJUSTMENT : SCANNING DIRECTION

XXX

1

199

OK

TEST

CLOSE

E :

2

;

PAPER : CS1

F :

1

;

DUPLEX : NO

EXECUTE

A : 150

;

CYAN

B : 100

;

MAGENTA

C : 100

;

YELLOW

D :

1

;

MULTICOUNT

A:

SIMULATION NO.50-21

REGISTRATION ADJUSTMENT : SCANNING DIRECTION

XXX

1

199

OK

TEST

CLOSE

E :

2

;

PAPER : CS1

F :

1

;

DUPLEX : NO

EXECUTE

or end of print

EXECUTE

EXECUTE

10-key

B

C

A

MX-7000N  ADJUSTMENTS  6 – 22

4)

Check the rough adjustment and the fine adjustment print pat-
tern positions of each color.
The visually highest color density section is regarded as the
center, and used as the measurement value.

(If the fine adjustment print pattern is positioned in the range of
0 

± 1 for the fine adjustment reference pattern scale, the

adjustment is not required.)
If the above condition is not satisfied, select the color mode
adjustment item A – C to be adjusted with the scroll key, and
change the adjustment value to adjust.

Repeat procedures 3) – 4) until a satisfactory result is
obtained.
For measurement of the shift amount and calculation of the
adjustment value, refer to the table below.
(Measurement of the shift amount and calculation of the
adjustment value)
a)

Measurement of the shift amount
* Measurement of the fine adjustment pattern

The visually highest color density section is regarded as
the center, and used as the measurement value of the
shift amount.
(Example)
The measurement value of the figure is "7."

* Measurement of the rough adjustment pattern

Check that the color line is positioned in the plus direc-
tion or in the minus direction and judge the polarity from
that.
The center black line mark is scaled as 0, the first line
mark as 20, the second line mark as 40, the third line
mark as 60. The interval between the rough adjustment
marks corresponds to 20.
(Example)
In the case of the figure, it is between 20 – 40 of the
plus polarity, and the measurement is "20."

A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range

The shift amount is calculated from the adjustment ref-
erence position for each of the three adjustment items A
– C.

Rough adjustment 
print pattern check:

Check that the rough adjustment print pattern is at 
the center for the rough adjustment reference 
pattern.

Fine adjustment 
print pattern check:

Check that the fine adjustment print pattern is at the 
center for the fine adjustment reference pattern.

A

CYAN

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

1 – 199

100

B

MAGENTA

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

1 – 199

100

C

YELLOW

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

1 – 199

100

-20

C

A

B

20

C

A

B

MX-7000N  ADJUSTMENTS  6 – 23

b)

Adjustment value calculation
Add or subtract the shift amount calculated above to or from the current adjustment value, and the result value is used as the new
adjustment value.
Adjustment value = Current adjustment value + Shift amount (correction value)
(When the shift amount (correction value) is plus)
Adjustment value = Current adjustment value – Shift amount (correction value)
(When the shift amount (correction value) is minus)

 

This adjustment is required 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. (For details, refer to Chapter [D]-3.)
1)

Loosen the fixing screws of the scanner unit A and the drive
wire, and remove the scanner unit A from the drive wire.

A

B

C

A: 100

A: 73 (= 100 – 27)

B: 112

B: 119 (= 112 + 7)

C: 95

C: 110 (= 95 + 15)

MX-7000N  ADJUSTMENTS  6 – 24

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 not, perform the following procedures.

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
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 (the
top surface of the mylar), and fix the scanner unit A with the fix-
ing screw.

 

1)

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

L

L

L = 10mm

L

L