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AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 4

• LSU right angle adjustment (If there is no distortion in self print,

the adjustment is not required.)

• Each tray resist amount setting

• Print lead edge adjustment

• Front/rear and left/right void amount setting

1) Execute SIM50-10.

2) Set the paper feed tray and the magnification ratio for the

adjustment.

3) After entering the adjustment values, press START key, and

printing is started.

4) Check the off-center (distance from the paper edge) of the

printed copy. Repeat procedure 2) until the specification is
satisfied.

• For the duplex mode (Single 

→

 Duplex), add 10 to the above set value. 

• When the print line is shifted toward a from the paper center, decrease the value.

• When the print line is shifted toward b from the paper center, increase the value.

• LSU right angle adjustment (If there is no distortion in self print,

the adjustment is not required.)

• Print off-center adjustment

• Print lead edge adjustment

• Front/rear and left/right void amount setting

1) Execute SIM 51-2.

2) Enter the resist adjustment value with 10-key.

3) Press [START] key. 

When [START] key is pressed, the adjustment value is set and
paper feed and copying are performed.

4) Adjust the resist quantity so that paper is transferred stably.

Measuring 

point

Specification

Set value

Print 
distortion 
adjustment

Self print 
pattern 71

θ

 = 90° ± 0.13°

θ

 changes about 0.25 

degrees for 1 scale of 
adjustment. (A shifts 
about 1mm.)

a b

Print lead edge

2

SIMULATION 50-10

PRINT OFF-CENTER ADJUSTMENT. SELECT 0-8, AND PRESS

START.

0.TRAY SELECT 

1

   1.COPY START

2.MAGNIFICATION 

100

(ADJUSTMENT DATA)

3.TRAY1 

50

 4.TRAY2 

50

 5.TRAY3 

50

6.TRAY4 

50

 7.BPT  

50

  8.ADU   

50

Adjustment position

Measurement 

reference

Specification

Set value

Default

Range

Tray 1

Tray 1

Output pattern 
center line

0±1.5mm

50

0 - 99

Set value 1: 0.1mm shift

Tray 2

Tray 2

Tray 3

Tray 3/LCC left

Tray 4

Tray 4/LCC right

MFT

Manual feed

ADU

Duplex

a

b

Print lead edge

∗

This adjustment is executed when there is any lead edge vari-
ation or skew for each tray.

1

SIMULATION 51-2

RESIST TIMING ADJUSTMENT. SELECT 0-8, AND PRESS START.

0.TRAY SELECT 

1

  1.PRINT START

2.TRAY1 

60

      3.TRAY2 

50

  4.DESK 

50

5.BPT   

55

      6.ADU   

50

 

7.SPF(HIGH) 

60

  8.SPF(LOW) 

75

AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 5

When the set value is increased, the warp amount of paper is
increased. When the adjustment value is decreased, the warp
amount of paper is decreased.

• LSU right angle adjustment (If there is no distortion in self print,

the adjustment is not required.)

• Print off-center adjustment

• Resist amount adjustment

• Front/rear and left/right void amount setting

• OC scan lead edge adjustment

• SPF scan lead edge adjustment

1) Execute SIM 50-5.
2) Set the lead edge void adjustment value (DENA) as specified

below.

(Standard set value) Paper lead edge void: 3.5mm (DENA:
35)

∗

Set the adjustment value of DENA to 35. (Enter 35 as the
adjustment value of DENA, and press [P] key.)

3) Check the lead edge void area on the self print pattern

(SIM67-1).

(Enter 1 and press [START] key.)

4) If the adjustment result is not satisfactory, perform the follow-

ing procedures.

∗

If the lead edge void area is not 3.5mm:
Change the adjustment value of RRCB and perform the
adjustment. (Change the adjustment value of RRCB and
press [START] key.)
(Shift for the adjustment value change: 0.1mm/step)

• LSU right angle adjustment (If there is no distortion in self print,

the adjustment is not required.)

• Print off-center adjustment

• Resist amount adjustment

• Print lead edge adjustment

• OC scan lead edge adjustment

• SPF scan lead edge adjustment

1) Execute SIM 50-1.
(Lead edge image loss/void area adjustment)

1) Set the lead edge image loss adjustment value (LEAD EDGE)

and the paper lead edge void adjustment value (DENA) as fol-
lows. 

(Standard set value) 
Lead edge image loss: 1.5mm (LEDA: 15)

Paper lead edge void: 3.5mm (DENA: 35)

∗

Set LEAD to 15. (Enter 15 as the adjustment value of LEAD,
and press [P] key.) (0.1mm/step)

∗

Set DENA to 35. (Enter 35 as the adjustment value of
DENA, and press [P] key.) (0.1mm/step)

2) Make a copy at the normal ratio (100%) and check the lead

edge void area and the image loss. (Enter 100 as the set value
of the copy magnification ratio (MAGNIFICATION), and press
[START] key.)

3) If the adjustment result is not satisfactory, perform the follow-

ing procedures.

∗

If the lead edge void are is not 3.5mm:
Change the adjustment value of RRCB and perform the
adjustment. (Change the adjustment value of RRCB and
press [START] key.) (1msec/step)

∗

If the lead edge image loss is not 1.5mm:
Change the adjustment value of RRCA and perform the
adjustment. (Change the adjustment value of RRCA and
press [START] key.)
(Shift for the adjustment value change: 0.2mm/step)

(Rear edge void area adjustment)

Adjust so that the rear edge void area is 3.5mm. (Change the
adjustment value of TRAIL EDGE, and press [START] key.)

(Front/rear frame direction image loss adjustment)

Set the adjustment value of SIDE to 20. (Enter 20 as the adjust-
ment value of SIDE, and press [P] key.)

When the adjustment value is changed, the image position is
shifted in the front/rear frame direction.

(Front/rear frame direction void area adjustment)

Adjust so that the total of the front/rear direction void areas is
7.0mm. (Change the adjustment values of FRONT/REAR, and
press [START] key.)

Front frame void area = 3.5mm

Rear frame void area = 3.5mm

If, as shown above, the front and the rear void areas are not even,
use SIM 50-5 to adjust the image off-center position.

Item

Set 

range

Default

AR-M351U/

M355U

AR-M451U/

M455U

2 TRAY1

Tray 1 resist 
adjustment value

0 - 99

65

60

3 TRAY2

Tray 2 resist 
adjustment value

55

50

4 DESK

Desk resist 
adjustment value

55

50

5 BPT

Manual tray resist 
adjustment value

60

55

6 ADU

ADU resist 
adjustment value

55

50

Set position 

Specification 

Set value

Self print lead 
edge 
adjustment  
SIM 50-5

Print start 
position A of 
the output 
pattern 1

A = 4.0mm or less
(Lead and tail 
total: 8.0mm or 
less)

Shift of 
0.175mm 
(35ppm) / 
0.225mm 
(45ppm) for 
set value 1.

2

SIMULATION 50-5
LEAD EDGE ADJUSTMENT. SELECT 0-20, AND PRESS START.
0.TRAY SELECT 

1

  1.PRINT START

(ADJUSTMENT DATA)
LEAD EDGE: 2.RRCB 

50

    3.SIDE2 ADJ. 

50

RESIST:  4.T1  

50

  5.T2  

50

  6.DESK 

50

         7.BPT 

50

  8.ADU 

50

OFF CENTER: 9.T1   

50

  10.T2  

50

  11.T3 

50

  12.T4 

50

            13.BPT 

50

  14.ADU 

50

(VOID SETTING) 15.LEAD_EDGE(DENA)  

50

               16.TRAIL_EDGE(DENB) 

30

  17.FRONT/REAR 

30

A

[Output pattern]

AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 6

• Adjustment on the engine side (If there is no problem in self

print, no need to adjust.)

• OC scan off-center

• OC scan lead edge adjustment

1) Make a test chart as shown below. (Make a self-print pattern

71.)

2) Make a copy from the table glass, and check it. 

At that time, set the test chart correctly. If it is set in a distorted
position, the adjustment cannot be made correctly.

3) If the output value is not in the specified range, perform the fol-

lowing adjustment. 

4) Adjust the distortion.

Use a level gauge to check that the scanner is installed hori-
zontally.

Make a copy and check it. If there is any distortion as shown in
Fig. 1 or Fig. 2, loosen the scanner fixing screw (M4 x 8) and
the cam A fixing screw (M3 x 12) and adjust.

Shift cam A in the direction A by the difference in the copy image.

For one scale (one groove), shift by 0.5mm.

After shifting, tighten the fixing screw (M3 x 12) of cam A and
make a copy again, and check the copy again to insure that there
is no distortion. 

Shift cam A in the direction B by the difference in the copy image. 

For one scale (one groove), shift by 0.5mm. 

After shifting, tighten the fixing screw (M3 x 12) of cam A and
make a copy again, and check the copy again to insure that there
is no distortion.

After adjustment, tighten the fixing screw (M3 x 12) and the scan-
ner fixing screw (M4 x 8).

∗

If the above adjustment does not fix the problem, perform the
MB rail adjustment.

∗

After the OC distortion adjustment, perform SIM53-8 SPF scan-
ning position automatic adjustment.

• Nothing special

• Nothing special

1) Close the (D)SPF.

2) Check to confirm that the dove and the reference plate in the

figure below are in contact with the table glass (point a) and
the side guide (point b). (Place copy paper under the dove and
pull it out.) If they are not in contact, adjust with the set screw.

Set position

Specification

Set 

value

Lead edge void 
adjustment
“LEAD EDGE 
VOID (DENA)”

Output pattern 
“71” print void 
quantity A

A = 4.0mm or 
less
(A and B total: 
8.0mm or less)

Shift of 
0.1mm 
for set 
value 1.

Rear edge void 
adjustment
“TAIL EDGE VOID 
(DENB)”

Output pattern 
“71” print void 
quantity B

B = 4.0mm or 
less
(A and B total: 
8.0mm or less)

Side edge void 
adjustment
“FRONT/REAR”

Output pattern 
“71” print void 
quantity C + D

C and D total: 
8.0mm or less

2

SIMULATION 50-1

LEAD EDGE ADJUSTMENT. SELECT 0-9, AND PRESS START.

0.TRAY SELECT 

1

   1.COPY START

2.MAGNIFICATION 

100

(ADJUSTMENT DATA) 3.RRCA 

50

   4.RRCB 

50 

10.SIDE2 ADJ. 

50

(IMAGE LOSS SETTING) 5.LEAD 

15

 6.SIDE 

20

(VOID SETTING) 7.LEAD_EDGE(DENA) 

50

               8.TRAIL_EDGE(DENB)

30

  9.FRONT/REAR 

30

Print
lead edge

Fixing screw
(M4 x 8)

A

B

First copy image

First copy image

Image

Image

Paper

Paper

Difference

Difference

AR-M351U/M451U, AR-M355U/M455U  ADJUSTMENTS  8 - 7

• Adjustment on the engine side (If there is no problem in self

print, no need to adjust.)

• OC scan distortion adjustment

• SPF height adjustment

• SPF off-center

• SPF lead edge adjustment

• Front/rear and left/right void amount setting

1) Make a test chart as shown below. (Print a self-print pattern

71.)

2) Make a copy with DSPF.

3) Check that it is in the specified range.

4) Execute SIM51-2 to check the SPF set value.

Change the set value of the SPF resist amount to the following
value.

5) Though the SPF resist amount is the above value, if there is

any distortion in SPF scan, adjust the SPF installing position in
the following procedures.

6) Loosen the nut which is fixing the adjustment set screw of the

hinge R, and adjust the adjustment set screw.

7) Make a copy again, and check again that the value is in the

specified range.

8) Tighten the nut to fix the adjustment screw.

∗

After the SPF distortion adjustment, perform SIM53-8 SPF
scanning position automatic adjustment.

• Adjustment on the engine side (If there is no problem in self

print, no need to adjust.)

• OC scan distortion adjustment

• OC scan lead edge adjustment

• Original off-center adjustment

1) Place a print of self-print pattern (A3 or WLT) 70 or a scale on

the table glass.

2) Close the original cover, and make a copy.

3) Check that the value is within the specification.

4) If the value is not within the specified range, execute SIM48-1

(item 3, 4).

5) Make a copy again and check again that the value is within the

specification.

Specification

Adjustment 

position

Distance between 
dove (Reference 
plate) and table 
glass

3-point contact
(Left front/Left rear/Right 
front when viewed from 
the front)

Hinge 
adjustment set 
screw

7

SPF (HIGH)

60

8

SPF (LOW)

75

Specification

Adjustment position

Skew feed

Within ±3mm

Hinge R adjustment screw

1

SIMULATION 51-2

RESIST TIMING ADJUSTMENT. SELECT 0-8, AND PRESS START.

0.TRAY SELECT 

1

  1.PRINT START

2.TRAY1 

60

      3.TRAY2 

50

  4.DESK 

50

5.BPT   

55

      6.ADU   

50

 

7.SPF(HIGH) 

60

  8.SPF(LOW) 

75