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MX-M1204  ADJUSTMENTS  5 – 17

 

This adjustment is required in the following cases:
* When the DSPF section is disassembled.
* When the DSPF unit is replaced.
* When there is a distortion  (skew) on the back surface scan 

image of the DSPF unit.

1) Enter the Sim. 64-2 mode.
2) Set the adjustment values as shown below.

The self print pattern 5 (Grid pattern) of Sim. 64-2 is printed in the duplex print mode.

3) Select a paper feed tray with A3 (11 X 17) paper in it.
4) Press [EXECUTE] button.

The grid pattern image is printed.

5) Check to confirm that the printed grid pattern is virtually in par-

allel with the paper edges, and put the position marks A and B
on the front and the rear side of the front surface and the back
surface of paper.

A

PRINT PATTERN (1 - 22, 53 - 58, 71 - 78)

Select of print pattern 
(For details, refer to the following)

1 - 22, 53 - 58, 71 - 78

 (1 - 22, 53 - 58, 71 - 78 printable)

1

B

DOT1 (DOT1>=2  IF  A: 2, 11) 

Print dot number setting 
(Self print pattern: For m by n)

Pattern 2, 11: 2 - 255

Other than the above: 1 - 255

1

C

DOT2 (DOT2<=100 IF A: 59) 

Empty dot number setting 
(Self print pattern: For m by n)

Pattern 59: 0 - 100

Other than the above: 0 - 255

254

D

DENSITY (FIXED "255" IF A: 9) 

Select of print gradation

Pattern 9: 255 Fixed

Other than the above: 1 - 255

255

E

RESOLUTION (DPI)

Select of resolution. (600dpi, 1200dpi)

0 (600DPI) - 1 (1200DPI)

1

F

MULTI COUNT

Print quantity

1 - 999

1

G

EXPOSURE 
(2-8 IF A: 14-19) 

THROUGH

Select of exposure 
mode

No process (through)

Pattern 14 - 19: 2 - 8

Other than the above: 1 - 8

1

8 (STANDARD 

DITHER) 

CHAR/PIC

Text/Printed Photo

2

CHAR/PRPIC

Text/ Photograph

3

CHAR

Text

4

PRINT PIC

Printed Photo

5

PRINT PAPER

Photograph

6

MAP

Map

7

STANDARD 
DITCH

Dither without correction

8

H

PAPER

MFT

Paper feed tray 
selection

Manual paper feed

1 - 8

1

Select a paper feed 
tray with A3 (11 X 17) 
paper in it.

CS 1

Cassette 1

2

CS 2

Cassette 2

3

CS 3

Cassette 3

4

CS 4

Cassette 4

5

LCC1

LCC1

6

LCC2

LCC2

7

LCC3

LCC3

8

I

DUPLEX

YES

Select of duplex 
print

Yes

0 - 1

0

0

NO

No

1

J

PAPER TYPE

PLAIN

Select of paper type

Plain paper

1 - 4

1

1 (PLAIN) 

HEAVY

Heavy paper

2

OHP

OHP

3

ENVELOPE

Envelope

4

pass    

Paper   

direction

: ‘16/Aug.

MX-M1204  ADJUSTMENTS  5 – 18

6) Make a copy of the adjustment pattern made in the above pro-

cedure on A3  (11 X 17) paper in the DSPF duplex mode, and
check for any image distortion (skew). (Set the adjustment pat-
tern on the DSPF paper feed tray so that the marked side is on
the lead edge side.)
Check in one of the following methods:

[Check method 2]
Check to confirm that the right angle degrees of the print lines
in the main scanning direction are within 1.0mm with the paper
longitudinal direction print line as the reference. 

If the back surface copy image satisfies the above condition
the front surface copy image does not, go to "ADJ 5B DSPF
skew adjustment  (Front surface mode)."
If the back surface copy image does not satisfy the above con-
dition, perform the following procedure. 

7) Open the upper cover of the DSPF unit, and remove the pro-

tection cap.

8)

Turn the DSPF skew adjustment screw on the CCD unit to
minimize the skew.

When the adjustment screw is turned by 180 degrees, the
skew is changed by about 0.5mm.

Note:
Turn the DSPF skew adjustment screw within the range of one
turn (360 degrees) clockwise or counterclockwise. If the screw
is turned further than 1 turn, an image may not be copied. 
Note that the DSPF skew adjustment screws A and B must be
adjusted equally. 
For example, If screw a is turned clockwise and the adjustment
doesn't work, shouldn't screw a be turned back to the original
position and then screw B be turned in the opposite direction. 
Repeat the procedures 6 thru 9 until a satisfactory result is 
obtained.

 

 

This adjustment is needed in the following situations:
* The CCD unit has been removed from the machine.
* The CCD unit has been replaced.
* When the focus of a copy and a scan image in the document

table mode or in the DSPF front surface mode is improper.

* When the copy magnification ratio of a copy or a scan image in

the main scanning direction is improper.

1)

Enter the Sim. 48-1 mode.

2)

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

a

b

c

d

(Back side)

|c-d|

1 mm

(Front side)

|a-b|

1 mm

satisfied:

Condition  that should be 

satisfied:

Condition  that should be 

1

When the main scanning 
direction print line inclines to the 
left (Adjustment pattern c < d)

Turn the DSPF skew adjustment screw 
A counterclockwise, or turn the 
adjustment screw B clockwise.

When the main scanning 
direction print line inclines to the 
right (Adjustment pattern c > d)

Turn the DSPF adjustment screw A 
clockwise, or turn the adjustment screw 
B counterclockwise.

MX-M1204  ADJUSTMENTS  5 – 19

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 jump from the simulation mode to the
copy mode, and make a copy.

5) Compare the scale image length on the copy paper and the

actual scale length. 
If the copy magnification ratio is within the specification (100 



0.5%) and the resolution is satisfactory, the adjustment is not
required. 

Example: Fit the scale of 10mm with that on the copy scale
image, and compare them. 
If the copy magnification ratio is not within the specified range,
perform the following procedure. 

6) Remove the document table glass. 
7) Remove the dark box cover. 

8)

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

Perform this procedure when replacing the CCD unit, too.

9)

Loosen the CCD unit fixing screw. 

Never loosen the screws marked with X.
If one of these screws is loosened, the CCD unit base position
and angle may be changed. In this case, the adjustment can-
not be made in the field, and the whole scanner unit may have
to be replaced. 

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

direction) to change the mounting position. 
When the copy image is longer than the original, move the unit
in the direction of B. If the copy image is shorter than the origi-
nal, move the unit in the direction of A.
One scale of mark-off line corresponds to a change of 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scales on the front and the rear frame side of the CCD unit
base. 
Fix so that the CCD unit is in parallel with the marked line
made in the procedure 9).

10

20

90

100

110

10

20

90

100

110

0.5mm

100mm scale
(Original)

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

MX-M1204  ADJUSTMENTS  5 – 20

11) Fix the CCD unit, and make a normal duplex copy on A4 (11 X

8.5) paper in the DSPF mode in the similar way as the proce-
dures 3 and 4. Check to confirm that the copy magnification
ratio is within the specified range (100 

 0.5%) and that a satis-

factory resolution is obtained. 
Repeat the procedures 9 thru 11 until the above conditions are
satisfied. 

Note:
Check to confirm that the copy magnification ratio is adjusted
within the specified range (100 

 0.5%) by changing the CCD

unit fixing position when the adjustment value of Sim. 48-1 is
50 on the optical system structure and that the satisfactory
result is obtained. 
Check the document off-center. 

 

This adjustment is needed in the following situations:
* When the DSPF CCD unit is disassembled.
* When the DSPF CCD unit is replaced.
* When the focus of a copy or a scan image in the DSPF back sur-

face mode is improper.

* When the copy magnification ratio of a copy or a san image in

the main scanning direction in the DSPF back surface mode is
improper.

1) Enter the Sim. 48-1 mode.
2) Set the adjustment item of SPFB (MAIN) to 50 (default).

Select the adjustment item with the scroll button, and enter the
adjustment value with 10-key and press [OK] key.

3) Make an adjustment chart with A4 (11 X 8.5) paper as shown

below. 
Draw a line at 10mm inside from the paper edge in parallel with
the paper transport direction.

4) Place the adjustment chart on the DSPF document tray so that

the drawn line comes on the lower side.

5) Make a normal duplex copy on A4 (11 X 8.5) paper in the 

DSPF mode. 

6) Measure the length of the image on the copy paper (back sur-

face) and the adjustment chart image.
If the copy magnification ratio is within the specified range (100
 0.5%) and the resolution is satisfactory, the adjustment is not
required.  

If the copy magnification ratio is not within the specified range,
perform the following procedure.

7) Remove the DSPF optical unit.

For disassembly, refer to "[C] DSPF" section.

8)

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

This procedure must be performed when replacing the DSPF
CCD unit, too.

9)

Loosen the fixing screw of the DSPF optical unit.

Never loosen the screws marked with X.
If one of these screws is loosened, the CCD unit base position
and angle may be changed. In this case, the adjustment can-
not be made in the field, and the whole DSPF optical unit must
be replaced.

10) Slide the DSPF CCD unit in the arrow direction (CCD sub

scanning direction) to change the mounting position. 
If the copy image is longer than the original, shift the unit in the
direction of B. If the copy image is shorter than the original,
shift the unit in the direction of A. 
Each line of the scale corresponds to a change of 0.2 %.
At that time, secure so that the DSPF CCD unit is in parallel
with the scales on the front and the back frame sides of the
DSPF CCD unit. 
Secure so that the DSPF CCD unit is in parallel with the
marked line made in the procedure 8). 

A4 size

(both sides)

10mm

10mm

Paper pass direction

original

10

50

100

150

200

250

copy

10

50

100

150

200

250