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MX-7000N  ADJUSTMENTS  6 – 26

5)

Change the height balance of the scanner rail on the front
frame side.

Remove the lower cabinet of the operation panel. Loosen the
scanner rail fixing screw to change the balance between the
right and the left heights of the scanner rail.
Repeat the procedures 2) – 5) until the difference between the
image distortions (distortion balance) is deleted.

6)

Without changing the balance of the scanner rail on the front
frame side, change the overall height.

7)

Set the test chart prepared in the procedure 1) and make a
copy on A3 (11" x 17") paper. Check that the distortion in the
main scanning direction is within the specified range.
Repeat the procedures 6) and 7) until the distortion in the main
scanning direction is in the specified range.
If the distortion in the sub scanning direction cannot be deleted
with the above procedures, perform “ADJ 13D Scan image dis-
tortion adjustment (Whole scanner).”

 

This adjustment is executed when scan image distortion cannot be
adjusted with ADJ 13A, ADJ 13B, and ADJ 13C related to the scan
image distortion adjustment.
Change the upper and lower positions of the scanner unit distortion
adjustment plate on the left edge of the scanner unit so that the
scan image distortion is minimized. By adjusting the mechanical
distortion of the whole scanner unit, the scan image distortion is
adjusted.
1)

Loosen the fixing screw (A).

2)

Adjust the scanner unit distortion adjustment plate.

 

 

This adjustment is required in the following cases:
* When the CCD unit is removed from the machine.
* When the CCD unit is replaced.
* When the copy image focus is not properly adjusted.
* When the copy magnification ratio in the copy image main scan-

ning direction is not properly adjusted.

* When a U2 trouble occurs.
1)

Enter the simulation 48-1 mode.

2)

Set the adjustment item CCD (MAIN) to 50 (default value).
Select the adjustment item with the scroll key, and enter the
adjustment value with 10-key and press [OK] key.

3)

Place a scale on the document table as shown in the figure
below.

4)

Make a normal copy on A4 paper.
Press [CLOSE] key to shift from the simulation mode to the
copy mode, and make a copy.

5)

Compare the scale length with the scale image length on the
copy paper.

6)

Obtain the copy magnification ratio correction ratio in the main
scanning direction from the following formula.
Main scanning direction copy magnification ratio correction
ratio = (Original size – Copy image size) / Original size x 100%
Example: Compare the scale of 10mm with the scale of 10mm 

on the copy image.

Main scanning direction copy magnification ratio correction
ratio = (100 – 99) / 100 x 100 = 1

A : 50

;

CCD(MAIN)

B : 50

;

CCD(SUB)

C : 50

;

SPF(MAIN)

D : 50

;

SPF(SUB)

A:

SIMULATION NO.48-01

MAGNIFICATION ADJUSTMENT

XX

1

99

OK

TEST

CLOSE

E : 50

;

SPFB(MAIN)

F : 50

;

SPFB(SUB)

MX-7000N  ADJUSTMENTS  6 – 27

If the copy magnification ratio is not satisfactory, perform the
following procedures.

7)

Remove the document table glass.

8)

Remove the dark box cover.

9)

To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.

* This procedure must be executed also when the CCD unit is

replaced.

10) Loosen the CCD unit fixing screws.

* Never loosen the screws marked with ✕.

If any one of these screws is loosened, the position and the
angle of the CCD unit base may be changed to cause a
problem, which cannot be adjusted in the market. In that
case, the whole scanner unit must be replaced.

11) Slide the CCD unit in the arrow direction (CCD sub scanning

direction) to change the installing position.
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked

in procedure 9).

12) Make a copy and check the copy magnification ratio again.

If the copy magnification ratio is not in the range of 100 

± 1%,

repeat the procedures of 9) – 11) until the condition is satisfied.

NOTE: By changing the CCD unit fixing position with the simula-

tion 48-1 adjustment value at 50, the copy magnification
ratio is adjusted within the specified range (100 

± 1.0%)

and the specified resolution is obtained based on the opti-
cal system structure.

 

This adjustment is required in the following cases:
* When the DSPF CCD unit is replaced.
* When the DSPF CCD unit is replaced.
* When the COPY/SCAN/FAX image focus is not properly

adjusted.

* When the DSPF unit is removed.
* When the DSPF unit is replaced.
1)

Make a duplex copy in DSPF mode.

2)

Make sure that the copied image on the back side of the paper
is satisfactorily focused.
If the image is not satisfactorily focused, do the following
steps.

3)

Open the door. Remove the screws, and remove the transport
PG upper.

10

20

90

100

110

10

20

90

100

110

1.0mm

100mm scale
(Original)

Copy image
(1mm (1%)
shorter than
the original)

MX-7000N  ADJUSTMENTS  6 – 28

4)

To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.

5)

Loosen the CCD unit fixing screws (4 pcs.).

* Never loosen the screws marked with ✕.

Loosening these screws could possibly change the CCD
unit base optical axis.  Once the optical axis has been
changed, it cannot be corrected through on-site adjust-
ments. Solving such a problem requires the replacement of
the entire scanner unit.

6)

Slide the CCD unit in the arrow direction (CCD sub scanning
direction) to change the installing position.
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked

in procedure 4).

7)

Make a copy and check the copy magnification ratio again.
If the copy magnification ratio is not in the range of 100 

± 1%,

repeat the procedures of 4) – 6) until the condition is satisfied.

NOTE: By changing the CCD unit fixing position with the simula-

tion 48-1 adjustment value at 50, the copy magnification
ratio is adjusted within the specified range (100 

± 1.0%)

and the specified resolution is obtained based on the opti-
cal system structure.

 

 

This adjustment is needed in the following situations: 
* The DSPF section has been disassembled.
* The DSPF unit has been replaced.
1)

Close the DSPF unit and check the clearance between the
projections in the front side and the rear side and the SPF
glass holding resin surface.

2)

Visually check to insure that the clearance A is 1mm or less
and the clearance B is 0mm (in contact).

If the above requirement is not met, do step 3.

3)

Turn the height adjustment screw to adjust the DSPF front/rear
frame horizontal level.

When the front frame side is higher (there is a clearance in B):
Turn the height adjustment screw R of the DSPF rear frame
clockwise.
When the rear frame side is higher (clearance A is more than
1mm): Turn the height adjustment screw L of the DSPF rear
frame counterclockwise.
Repeat steps 2 to 3 until an acceptable result is obtained.

A

B

A

B

0mm

1mm

or less

R

L

MX-7000N  ADJUSTMENTS  6 – 29

4)

After adjustments of A and B, check to insure that the projec-
tion on the front right side is in contact with the glass surface of
the main unit.

 

This adjustment is needed in the following situations:
* The DSPF section has been disassembled.
* When replacing the DSPF unit.
* The DSPF unit generates skewed scanned images.
1)

Create an adjustment chart by printing in duplex mode the self-
print pattern 1 (grid pattern) specified in Simulation 64-1. 
Make sure that the print grid pattern is almost in parallel with
the paper edges, and apply position marks 'A', 'B', 'C' and 'D' to
the leading and trailing edges of the paper for both front and
back sides of the paper.

2)

Copy the adjustment chart (created in step 1) to A3 (11" x 17")
paper in DSPF duplex mode, and then check the image for
skews (Set in the DSPF feed tray so that the mark on the
adjustment chart is at the edge). 
• Check with one of the following methods.

[Check Method 1]

[Check Method 2]
Check that the squareness of the main scanning direction
print line for the longitudinal direction of paper is within
1.0mm.

If the front surface copy image is as shown above and the
back surface copy is not as shown above, go to the step 3)
of "ADJ 15C DSPF skew adjustment (Back surface mode)."
If the above requirement is not met for the paper's front side,
then do step 3.

3)

Loosen the hinge screws and lower the two attachments.

4)

Open the DSPF and loosen the screw.

5)

Adjust by turning the DSPF skew adjusting screw on the right
side of the DSPF rear frame.

Paper pass direction

a

b

c

d

(Front side)
Make sure that the output satisfies the condition: |a-b|

± 1 mm

(Back side)
Make sure that the output satisfies the condition: |c-d|

± 1 mm

0 - 1.0mm

1

2