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MX-M503N  ADJUSTMENTS AND SETTINGS  4 – 9

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 50-1.
(Note) Feed paper from all the paper feed trays to confirm.

5)

Enter the SIM 50-1 mode.

6)

Select the adjustment item I, J, K with the scroll key, and 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.

NOTE: The adjustment value and the actual void area are related

as follows:
Adjustment value/10 = Actual void area

NOTE: When the amount of the rear edge void is different between

each paper feed tray, change the adjustment value of item
N, O, P, Q, R, S, T (DENB-XXX) in SIM50-1 and adjust.
The adjustment item J (DENB) have a effect on the paper
of all paper feed tray.
That is, adjustment value of item N, O, P, Q, R, S, T
(DENB-XXX) fine adjusts to adjustment item J (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 RRCB-XXX (item B, C, D, E, F) of SIM 50-1.
Repeat the above procedures until a satisfactory result is obtained.

X

Lead edge void area

3.0 

 1.0mm

Y

Rear edge void area

2.0 - 5.0mm

Z1/Z2

FRONT/REAR void area

2.0 

 2.0mm

X

Y

Z2
2.0

3.0 1.0mm

2.0 - 5.0mm

Z1
2.0

2.0mm

2.0mm

OK

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A

Lead 
edge 
adjust-
ment 
value

RRCA

Document lead edge 
reference position 
(OC)

0 - 99

50

B

RRCB-CS12

Resist 
motor ON 
timing 
adjust-
ment

Standard 
Tray

1 - 99

50

C

RRCB-CS34

Desk

1 - 99

50

D

RRCB-LCC

LCC

1 - 99

50

E

RRCB-MFT

Manual 
paper 
feed

1 - 99

50

F

RRCB-ADU

ADU

1 - 99

50

G Image 

loss area 
setting 
value

LEAD

Lead edge image 
loss area setting

0 - 99

30

H

SIDE

Side image loss area 
adjustment

0 - 99

20

I

Void area 
adjust-
ment

DENA

Lead edge void area 
adjustment

1 - 99

30

J

DENB

Rear edge void area 
adjustment

1 - 99

30

K

FRONT/
REAR

FRONT/REAR void 
area adjustment

1 - 99

20

L

Off-center 
adjust-
ment

OFFSET_
OC

OC document off-
center adjustment

1 - 99

50

M Magnifi-

cation 
ratio 
correction

SCAN_
SPEED_OC

SCAN sub scanning 
magnification ratio 
adjustment (CCD)

1 - 99

50

N Sub 

scanning 
direction 
print area 
correction 
value

DENB-MFT

Manual feed 
correction value

1 - 99

50

O

DENB-CS1

Tray 1 correction 
value

1 - 99

50

P

DENB-CS2

Tray 2 correction 
value

1 - 99

50

Q

DENB-CS3

Tray 3 correction 
value

1 - 99

50

R

DENB-CS4

Tray 4 correction 
value

1 - 99

50

S

DENB-LCC

LCC correction value

1 - 99

50

T

DENB-ADU

ADU correction value

1 - 99

66

MX-M503N  ADJUSTMENTS AND SETTINGS  4 – 10

 

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 3B 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 section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replaced.
* When the large capacity paper feed tray section is disassembled.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
(Note)
Before execution of this adjustment, check to insure the following
item.
* Check that the ADJ 3B Print engine image magnification ratio

adjustment (Main scanning direction) has been properly
adjusted.

1)

Enter SIM 50-10 mode.

2)

Use the scroll key to select a paper feed tray which is to be
adjusted. (Items B - H)

3)

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

4)

Press [EXECUTE] key.
The adjustment pattern is printed.

5)

Check that the adjustment pattern image is printed in the cor-
rect position.
Measure the dimension of the void area in the front and the
rear frame direction of the adjustment pattern, and check that
all the following conditions are satisfied.

RV: REAR VOID AREA
FV: FRONT VOID AREA

RV + FV 

 4.0mm

RV = 2.0 

 2.0mm

FV = 2.0 

 2.0mm

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

A

BK-MAG

Main scan print 
magnification ratio BK

60 - 140

100

B

MAIN-MFT

Print off center adjustment 
value (Manual paper feed)

1 - 99

50

C

MAIN-CS1

Print off center adjustment 
value (Tray 1)

1 - 99

50

D

MAIN-CS2

Print off center adjustment 
value (Tray 2)

1 - 99

50

EXECUTE

End of print

EXECUTE

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E

MAIN-CS3

Print off center adjustment 
value (Tray 3)

1 - 99

50

F

MAIN-CS4

Print off center adjustment 
value (Tray 4)

1 - 99

50

G

MAIN-LCC

Print off center adjustment 
value (LCC)

1 - 99

50

H

MAIN-ADU

Print off center adjustment 
value (ADU)
NOTE: 

Before execution of this 
adjustment check to 
insure that the adjustment 
items A - G have been 
properly adjusted. If not, 
this adjustment cannot be 
made properly.

1 - 99

50

I

SUB-MFT

Registration 
motor ON
Timing 
adjustment

Manual 
paper feed

1 - 99

50

J

SUB-CS12

Standard 
tray

1 - 99

50

K

SUB-CS34

DESK

1 - 99

50

L

SUB-LCC

LCC

1 - 99

50

M

SUB-ADU

ADU

1 - 99

50

N

MULTI COUNT

Number of print

1 - 999

1

O

PAPER

MFT

Tray selection

Manual 
paper feed

1 - 6

1

2 

(CS1)

CS1

Tray 1

2

CS2

Tray 2

3

CS3

Tray 3

4

CS4

Tray 4

5

LCC

LCC

6

P

DUPLEX

YES

Duplex print 
selection

Yes

0 - 1

0

1 (NO)

NO

No

1

RV
2.0mm

2.0mm

FV
2.0mm

2.0mm

MX-M503N  ADJUSTMENTS AND SETTINGS  4 – 11

6)

Change the adjustment value.
Enter the adjustment value and press the [OK] key or the
[EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the adjustment pat-
tern is shifted to the front frame side. When it is decreased, the
adjustment pattern is shifted to the rear frame side.
When the set value is changed by 1, the shift distance is
changed by about 0.1mm.
Repeat procedures 3) - 6) until the conditions of procedure 5)
are satisfied.
In case a satisfactory result cannot be obtained by repeating
the above procedures, perform the following procedure.

7)

Loosen the paper feed tray off-center adjustment screws (2
pcs.) at the center section of the lift plate of the paper feed tray,
and change the gear unit position in the front/rear frame direc-
tion. Repeat the adjustment procedures from 4).

 

This adjustment is needed in the following situations:
* When the scanner (reading) section is disassembled.
* When the copy image is distorted.

 

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

1)

Remove the LED lamp unit, and then loosen the screws which
are fixing the scanner unit A and the drive wire. Release the
scanner unit A from the drive wire.

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 this requirement is not met, do the following steps.

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
on the front and the rear frames simultaneously.

MX-M503N  ADJUSTMENTS AND SETTINGS  4 – 12

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, and
fix the scanner unit A with the fixing screw.

1)

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

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 this requirement is not met, do the following steps.

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
on the front and the rear frames simultaneously.