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MX-M905  ADJUSTMENTS  5 – 9

 

This adjustment is needed in the following situations:

* LSU (write) unit has been replaced.

* U2 trouble has occurred.

* The PCU PWB has been replaced.

* The EEPROM of the PCU PWB has been replaced.

1)

Enter the Sim.50-10 mode. 

2)

Select A4 (11 X 8.5) paper.

3)

Press [EXECUTE] key.

The check pattern is printed out.

4)

Check that the inside dimension of the printed half tone is 240
 0.5mm.

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

5)

Change the set value of set item A.

When the set value is changed by 1, the dimension is changed
by 0.1mm.

When the set value is increased, the main scanning direction 
image magnification ratio in the main scanning direction is
increased. When the set value is decreased, the mian scan-
ning direction image magnification ratio in the main scanning
direction is decreased.
Repeat procedures 3 thru 5 until a satisfactory result is
obtained.

 

This adjustment is needed in the following situations:

* When the resist roller section is disassembled.

* When the LSU is replace or removed.

* U2 trouble has occurred.

* The PCU PWB has been replaced.

* The EEPROM of the PCU PWB has been replaced.

1)

Enter the Sim. 50-5 mode.

2)

Press [EXECUTE] key.

The adjustment pattern is printed.

Check the adjustment pattern to confirm that the following
items are the standard values.

(Note) 
Check by feeding from all the paper feed trays. 

If the above conditions are not satisfied or the adjustment
value is set to an optional value, perform the following proce-
dures.

3)

Select the adjustment item with the scroll key.

X

Lead edge void area

4.0mm or less

Y

Rear edge void area

4.0mm or less

Z1/Z2

FRONT / REAR void area

5.0 mm or less 

(Z1+Z2)

 

5.0 mm or less (Z1+Z2)

Y
4.0mm or less

X
4.0mm or less

5.0 mm or less (Z1+Z2)

A

DEN-C

(Void quantity) Printer print lead edge 
adjustment value

1 - 99

30

Adjustment value to fit the print lead edge in the printer mode.
When the adjustment value is decreased by 1, the printer print start 
position is shifted to the lead edge in the paper transport direction by 
0.1mm. 

B

DEN-B

(Void quantity) Sub scanning direction 
print area adjustment value

1 - 99

30

Void quantity generated at the paper rear edge.
When the adjustment value of B (DEN-B) is decreased by 1, the sub 
scanning direction print area adjustment value is decreased in the 
paper transport direction by 0.1mm.

C

FRONT/REAR

(Void quantity) FRONT / REAR void 
quantity adjustment

1 - 99

20

Adjustment of the void quantity generated at the right and left edges 
of paper.
When the value is increased, the void quantity is increased.

D

DENB-MFT

(Sub scanning direction print area) 
Manual paper feed correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the manual feed is adjusted for the adjustment value of 
item B (DEN-B), this value is changed. 

E

DENB-CS1

(Sub scanning direction print area) 
Cassette 1 correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the cassette 1 is adjusted for the adjustment value of item 
B (DEN-B), this value is changed. 

F

DENB-CS2

(Sub scanning direction print area) 
Cassette 2 correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the cassette 2 is adjusted for the adjustment value of item 
B (DEN-B), this value is changed. 

MX-M905  ADJUSTMENTS  5 – 10

4)

Enter the adjustment value with 10-key, and press [OK] key or
[EXECUTE] key. 
When [EXECUTE] key is pressed, the adjustment pattern is
printed. 

When the adjustment value is changed by 1, it is changed by
about 0.1mm.

Repeat procedures 2 thru 4 until the conditions of procedure 2)
are satisfied.  

 

This adjustment is needed in the following situations:

* The scanner (reading) section has been disassembled.

* When a distortion is produced in copy and scan images.

 

Before execution of this procedure, remove the document table
glass.

1)

Loosen the screw which is fixing the scanner unit A and the
drive wire, and remove the scanner unit A from the drive wire.

2)

Manually turn the scanner drive pulley, to move the scanner
unit B until it is in contact with the stopper. 

If the scanner unit B is in contact with the stoppers at the front
and the rear frames simultaneously, the parallelism of the
scanner unit B is proper. 

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

G

DENB-CS3

(Sub scanning direction print area) 
Cassette 3 correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the cassette 3 is adjusted for the adjustment value of item 
B (DEN-B), this value is changed. 

H

DENB-CS4

(Sub scanning direction print area) 
Cassette 4 correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the cassette 4 is adjusted for the adjustment value of item 
B (DEN-B), this value is changed. 

I

DENB-LC

(Sub scanning direction print area) 
LCC/LCT/LCT manual paper feed 
correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the LCC/LCT/LCT manual feed is adjusted for the 
adjustment value of item B (DEN-B), this value is changed. 

J

DENB_ADU

(Sub scanning direction print area) 
ADU correction vaule

1 - 99

55

Adjustment of the void quantity generated at the rear edge of paper.
When only the ADU is adjusted for the adjustment value of item B 
(DEN-B), this value is changed.

K

DENB-HV

(Sub scanning direction print area) 
Heavy paper correction value

1 - 99

50

Adjustment of the void quantity generated at the rear edge of paper.
When only the heavy paper is adjusted for the adjustment value of 
item B (DEN-B), this value is changed. 

L

MULTI COUNT

Print quantity

1 - 999

1

M

PAPER

Cassette select

1 - 99

3

N

DUPLEX

Duplex print select

0 - 1

1

MX-M905  ADJUSTMENTS  5 – 11

3)

Loosen the fixing screw of the pulley angle on the front frame
side of the scanner unit B. 

4)

Adjust the pulley angle position on the front frame side of the
scanner unit B so that the scanner unit B is in contact with the
stoppers on the front and the rear frames of the scanner unit B
simultaneously. 

5)

With the scanner unit B in contact with the stoppers simultane-
ously, fit the edge of the scanner unit A and the right edge of
the frame (top of the Mylar), and secure the scanner unit A
with the screw.

 

1)

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

2)

Set the test chart made in the procedure 1) on the document
table so that the test charts is shifted toward you by 30mm
from the document set reference position. With the document
cover open, make a copy on A3 (11" X 17") paper. 

3)

Check for any distortion in the sub scanning direction.

If La = Lb, there is no distortion.

4)

Without moving the scanner unit drive shaft, manually turn the
scanner unit drive pulley to adjust the parallelism of the scan-
ner unit A and B. (Change the relative positions of the scanner
unit drive pulley and the drive shaft.)

Tighten the fixing screw of the scanner unit drive pulley.

Repeat the procedures of 2 thru 5 until the condition of proce-
dure 3) is satisfied.

If a distortion in the sub scanning direction cannot be removed
in the above procedures, perform “ADJ 4C Scan image overall
distortion adjustment.”

L

L

L = 10mm

L

L

La

Lb

MX-M905  ADJUSTMENTS  5 – 12

 

1)

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

2)

Set the test chart made in the procedure 1) on the document
table, and make a copy on A3 (11” X 17”) paper. 

3)

Check for any distortion in the main scanning direction.

If the four angles of the copy image (rectangle) is right angles,
there is no distortion. (Work completed)

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

1)

Turn the horizontal level adjustment screw of the CCD unit. 
(There are two adjustment screws in the front (A) and at the
back (B). Be sure to use only the screw in the front (A))
(When adjusting with the screw at the back (B), use a great
care for generation of shades of images.) 

Turn the CCD unit horizontal adjustment screw (A) clockwise. 

(When adjusting the adjustment screw (B) on the front frame
side, turn the screw counterclockwise. When adjusting the
adjustment screw on the rear frame side, turn the screw coun-
terclockwise.)

Turn the CCD unit horizontal adjustment screw (A)  clockwise.

(When adjusting the adjustment screw (B) on the front frame
side, turn the screw clockwise. When adjusting the adjustment
screw on the rear frame side, turn the screw clockwise.)

2)

Make a copy of the distortion check test chart, and check for
any distortion on the left side.
Repeat the above procedures until the distortion on the left
side is minimized.
Variation 0.7/260mm, 0.5 revolution

1)

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

Remove the rear upper cabinet. Loosen the scanner rail fixing
screw (red screw) on the left side when viewed from the front
to change the height balance of the left and right sides of the
scanner rail. There are two fixing screws (red screws) of the
scanner rail. 

There is a scanner rail also on the front frame side, and it
height balance can be adjusted. However, it is not advisable to
adjust it because many parts must be removed for the adjust-
ment. 

L

L

L = 10mm

L

L

 

A

B