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MX-C300P  ADJUSTMENTS  5 – 7

9)

If there are several skewed areas on the test printing result,
turn all the LSU skew adjustment screws shown in the figure  *
To make "SKEW_*" values in the following ranges, turn the
LSU skew adjustment screws clockwise direction (a) or coun-
terclockwise direction (b).  
SKEW_C : +/-30, SKEW_M : +/-40, SKEW_Y : +/-20

10)  Enter the SIM61-4 mode and perform the procedures of 2) - 3). 

 Check the printed color image skew pattern.

In each Y/M/C color print pattern printed separately in the F side and in the R side, note the same print color pattern and check to confirm
that the front frame side and the rear frame side are in the same condition.

Check the sub scan rough adjustment color image shift check section on the R side and the F side of each color, use the black scale of "0"
as the center reference, and check the balance in shifts of the color image line positions in the positive and the negative directions. The
balance in the R side must be the same as that in the F side.

Check the square frames on the R side and the F side of each
color. (Normally five sections of high density can be seen.)
Check the sub scanning direction position of the center area of
high density (one of the above five sections). These must be
on the same position on the R side and the F side.

In this case, use the sub scan direction color image shift check
scale (fine adjustment) as the reference.

Visually check the color density and make the darkest section
as the center, and use it as the read value of the shift amount.

Check that the difference in the center position of the dark den-
sity section is within +/- 2 step.

The positional relations of the front and the rear frame of the
print color patterns of a same color are compared. There is no
need that all the colors are in the same state. Compare only
the positional relations of color patterns of a same color.

If the above condition is not met, do the following:

C

M

Y

B

A

MX-C300P  ADJUSTMENTS  5 – 8

11) Turn the image skew adjustment screw of the target color to

adjust.

Relationship between the adjustment screw rotating angle and
the change in the adjustment image position:

Adjustment screw rotating angle (degree) = Image shift
amount (Adjustment scale) x10

Repeat procedures 10) - 11) until a satisfactory result is obtained.

 

Only when the manual adjustment is required, execute this adjust-
ment.

 

This adjustment is needed in the following situations:

* When the LSU (writing) unit is replaced.

* When each unit is replaced or fixed.

* When the void amount is changed by the maintenance

* When MFP PWB is replaced.

* U2 trouble has occurred.

1)

Go through the modes specified in Simulation 50-10.

2)

Set A4 (11" x 8.5") paper in the paper feed tray.

3)

Select the paper feed tray set in procedure 2) with [UP] or
[DOWN] keys.

4)

Press [OK] key.

The check pattern is printed out.

5)

Check that the inside dimension of the printed halftone is 140
+/- 0.5mm. 

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

6)

Change the set value of set item A BK-MAG.

C

M

Y

B

A

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140   0.5mm

MX-C300P  ADJUSTMENTS  5 – 9

(Enter the set value, and press [OK] key and OSA shortcut
key.)

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

When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.

     Repeat procedures 2) - 5) until a satisfactory result is obtained.

 

This adjustment is needed in the following situations:

* When the LSU is replaced or removed.

* When a paper tray is replaced.

* When the paper tray section is disassembled.

* When the manual feed tray is replaced.

* When the manual feed tray is disassembled.

* When the duplex mode paper transport section is disassembled.

* When the registration roller section is disassembled.

* When the MFPC PWB is replaced.

* U2 trouble has occurred.

NOTE: Before execution of this adjustment, be sure to execute the

print image magnification ratio adjustment (ADJ 4A) (main
scanning direction) (print engine) (manual adjustment).

1)

Enter SIM50-10 mode.

2)

Set A4 (11 x 8.5") paper to all the paper feed trays. Select an
adjustment item of the target paper feed tray among items B -
N and enter the adjustment value. Then select item "10" to
select the paper feed tray which is to be used for executing
test printing.

3)

Press [OK] key.

The adjustment pattern is printed.

4)

Check the adjustment pattern to confirm that the items below
are in the range of the standard values.

If the above condition is not satisfied, or if it is set to a desired
condition, execute the simulation 50-10.

Feed paper from all the paper feed trays to confirm.

5)

Enter the SIM 50-10 mode.

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X

Lead edge void area

More than 4.5mm less than 5.5mm

Total of X/Y is less than 8.0mm

X(Lead edge) is less than 5.5mm)

Y

Rear edge void area

More than 2.0mm less than 3.5mm 

(total of X/Y is less than 8.0mm)

Z1/

Z2

FRONT/REAR void area

Total of less than +/- 8.0mm

:

:

Z1+Z2 = 8.0mm or less

Z1+Z2 = 8.0mm or less

X : 
More than 4.5mm 
less than 5.5mm
(total of X/Y is 
less than 8.0mm
X(Lead edge) is 
less than 5.5mm)

Y : 
More than 2.0mm 
less than 3.5mm 
(total of X/Y is 
less than 8.0mm)

Paper exit direction

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MX-C300P  ADJUSTMENTS  5 – 10

6)

Select an adjustment item with the [UP] and [DOWN] key,
enter the adjustment value, and press [OK] key.

When the adjustment value is increased, the void area is
increased. When the adjustment value is decreased, the void
area is decreased.

When the adjustment value is changed by 1, the void area is
changed by 0.1mm.

When the amount of the rear edge void is different between
each paper feed tray, change the adjustment value of item
(DENB-XXX) in SIM50-1 and adjust.

The adjustment item (DENB) have a effect on the paper of all
paper feed tray.

That is, adjustment value of item (DENB-XXX) fine adjusts to
adjustment item (DENB) for each paper tray.

After execution of the above, perform procedures 1) - 4) to
check that the void area is within the specified range.

Though the lead edge void area adjustment value is proper, if
the lead edge void area is not within the specified range,
change the adjustment value of item (RRCB-XXX) in SIM 50-1.

The adjustment value and the actual void area are related as
follows:

Adjustment value/10 = shift amount

Repeat the above procedures until a satisfactory result is obtained.

 

This adjustment is needed in the following situations:

* When the LSU is replaced or removed.

* When a paper tray is replaced.

* When the paper tray section is disassembled.

* When ADJ 2 Print engine image magnification ratio adjustment

(Main scanning direction) is performed.

* When the manual feed tray is replaced.

* When the manual feed tray is disassembled.

* When the duplex mode paper transport section is disassembled.

* When the registration roller section is disassembled.

* When the MFP PWB is replaced.

* U2 trouble has occurred.

(Note)

Before execution of this adjustment, check to insure the following
item.

* The print image magnification ration adjustment (ADJ 4A) (main

scanning direction) (Print engine) (Manual adjustment) has been
properly adjusted.

1)

Enter SIM50-10 mode.

2)

Select the target paper feed tray (MAIN-XX) with the [UP] and
[DOWN] keys.

3)

Set A4 (11" x 8.5") paper in the paper feed tray selected in pro-
cedure 2).

4)

Press [OK] key.

The adjustment pattern is printed.

1

BK-MAG

Main scanning printing scale

60- 140

100

2

MAIN-MFT

Printing off center adjustment 
value (MFT)

1 - 99

65

3

MAIN-CS1

Printing off center adjustment 
value (CS1)

1 - 99

65

4

MAIN-CS2

Printing off center adjustment 
value (CS2)

1 - 99

50

5

MAIN-ADU

Printing off center adjustment 
value (ADU)

1 - 99

50

6

SUB-MFT

Registration 
motor ON tim-
ing adjustment

MFT

1 - 99

60

7

SUB-CS1

CS1

1 - 99

60

8

SUB-DSK

DSK

1 - 99

50

9

SUB-ADU

ADU

1 - 99

50

1

BK-MAG

Main scan print 
magnification ratio K

60 - 140

100

2

MAIN-MFT

Print off center adjustment 
value 
(Manual paper feed)

1 - 99

50

3

MAIN-CS1

Print off center adjustment 
value (Tray 1)

1 - 99

50

4

MAIN-CS2

Print off center adjustment 
value (Tray 2)

1 - 99

50

5

MAIN-ADU

Print off center adjustment 
value (Duplex)
(NOTE) If the adjustment 
items A - F are not properly 
adjusted, this adjustment 
cannot be executed 
properly.

1 - 99

50

6

SUB-MFT

Resist motor 
ON timing 
adjustment

Manual 
paper feed

1 - 99

50

7

SUB-CS1

Standard 
cassette

1 - 99

40

8

SUB-DSK

DESK 

1 - 99

42

9

SUB-ADU

ADU

1 - 99

50

10

DENB

Sub scanning direction print 
area correction value

1 - 99

35

11

PAP
ER

MFT

Cassette 
selection

Manual 
paper feed

1-3

1

2(CS1)

CS1

Cassette 1

2

CS2

Cassette 2

3

12

DUP
LEX

YES

2-sided 
printing 
selection

Select 0-1

0

1(NO)

NO

Not-select

1

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