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AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 11

1) Open the left door and the front door.

2) Remove the developer cartridge from the machine.

3) Remove the top cover of the developer cartridge.

4) While rotating the MG roller, supply developer into the devel-

oper cartridge evenly.

Note that the MG roller must be rotated in the arrow direction
as shown in the figure below.

Use of a metal scale or a screwdriver (-) facilitates the proce-
dure.

Note: Before opening the developer seal, shake it 4 or 5 times.

5) Attach the top cover to the developer cartridge and install the

cartridge to the machine.

1) Remove a new toner cartridge from the package and shake it

horizontally five or six times.

2) Insert a new toner cartridge.

Push the cartridge in until it locks securely into place.

AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 12

3) Gently remove the sealing tape from the cartridge.

4) Return the cartridge lock lever.

1) Put down the right and the left levers of the fusing unit in the

arrow direction. 

1) Pull out the first stage paper feed tray.

Slowly pull out the tray until it stops.

2) While pressing the paper holding plate, remove the fixing pin.

3) Put paper in the tray, and close the paper feed tray.

1) Attach the cabinets which were removed.

2) Close the left door.

At that time, keep the front door open.

Note: The automatic developer adjustment must be performed by

entering the simulation mode with the front door open. If the
power is turned on with the front door closed, warm-up is

performed to supply toner to the developing unit. As a

result, the reference toner density cannot be obtained.

3) Insert the power plug into the power outlet.

4) Go through the modes specified in Simulation 25-2.

5) Close the front door.

6) Press the [START] key, and the automatic developer adjust-

ment will be performed.

During execution of the automatic developer adjustment,
“EXECUTING...” is displayed and the toner sensor value is
indicated on the LCD. (DEVE REFERENCE)

Press [START] key.

Press [CUSTOM SETTINGS] key, and the 
operation is stopped immediately or after 2 min.

SIMULATION 25-2

AUTOMATIC DV ADJUSTMENT. PRESS START.

HUMIDITY AREA:     

70.0

 -  

72.5

TEMPERATURE AREA:  

70.0

 -  

72.5

DEVE REFERENCE: 

128

SIMULATION 25-2

AUTOMATIC DV ADJUSTMENT. EXECUTING···.

HUMIDITY AREA:     

70.0

 -  

72.5

TEMPERATURE AREA:  

70.0

 -  

72.5

DEVE REFERENCE: 

118

AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 13

7) After about 2 min, the adjustment value is stored in the

machine. Check that the mode was normally completed.

In case of an error end, remove the cause of the error, and
execute the automatic developer adjustment again.

8) Turn off/on the power, and the machine returns to the normal

mode and enters the warm-up mode.

1) After completion of warm-up (normal mode), select [CUSTOM

SETTINGS] 

→

 [Data list up] to display the menu.

2) Print [ALL SETUP LIST] to check and confirm the print quality.

3) Press the [CUSTOM SETTINGS] key again to return to the

normal menu.

Note: This adjustment must be performed after installing the

machine and its peripheral devices.

It is basically no need to perform the adjustment because it has
been made when shipping. If there should be a distortion as
shown in the figure below, perform the adjustment according to
the following procedures.

1) Use a level gauge to check to confirm that the scanner unit is

installed horizontally.

Make a copy, and if any distortion is found 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) to make an adjustment.

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

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

After shifting the cam, tighten the cam A fixing screw (M3 x 12).
Make a copy again and check to confirm that there is no distortion
on the image.

• Case of Fig. 2

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

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

After shifting the cam, tighten the cam A fixing screw (M3 x 12).
Make a copy again and check to confirm that there is no distortion
on the image.

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

Attach the decoration seal to the screw hole.

1) Execute SIM 53-8 after completion of the distortion adjust-

ment.

2) If any distortion is made after execution of the simulation, exe-

cute the MB rail position adjustment. (Refer to "3-A OC scan
distortion adjustment (MB-B rail height adjustment)" in [8]
ADJUSTMENTS.)

Attach the key sheet to the specified position on the operation
panel according to the support table below.

<North America only>

<English area other than North America>

Normal 

end:

Returns to the initial window (PRESS
START display).

Abnormal 

end: Returns to the initial window (PRESS

START display), and indicates the trouble
display (TROUBLE! EE-**).

Fixing screw

(M4x8)

First copy image

Difference

Image

Paper

AR-M355U/

M455U

AR-M355U/

M455U + AR-P20

AR-M355U/

M455U + AR-P21

Key Sheet 
(PRINT 
display)

❍

❍

✕

AR-M351U/

M451U

AR-M351U/

M451U + 

AR-NC7

AR-M351U/

M451U + 

AR-NC8

Key Sheet 
(PRINT 
display)

❍

❍

✕

First copy image

Difference

Image

Paper

Reference

Reference

6mm

15mm

AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 14

<Other than English area in Europe>

1) Insert the left adjuster into the paper feed desk.

2) Turn each adjuster until it is brought into contact with the floor.

∗

Be sure to install the left adjuster in order to prevent falling down
of the machine.

Note: If the adjusters are not lowered to the specified positions,

the lower stage tray cannot be pulled out.

1) Remove the screw, and remove the handle.

2) Insert the handle into the left rack notch diagonally upward as

shown in the figure.

3) Attach the screw which was removed in procedure 1) to

secure the handle.

4) Lift the rear edge 

 of the handle to engage the head with

the rack.

5) After completion of transport, restore the handle to the original

position.

AR-M351U/

M451U

AR-M351U/

M451U + 

AR-NC7

AR-M351U/

M451U + 

AR-NC8

Key Sheet 
(PRINT display)

❍

❍

✕

Key Sheet 
(DOCUMENT 
FILING display)

✕

✕

❍

Reference

Reference

1

2

2

2

2

A

A