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

<2> Hold the main unit of the printer at the positions shown in the

illustration and put the main unit on the stand/paper drawer
so that the front side and the left side of the main unit are
aligned to those of the stand/paper drawer.

Caution: For installation of the main unit, it must be held by two

persons and installed without haste.

4) Connect the main unit to the stand/paper drawer.

<1> Attach the rear mounting plates using a supplied screw for

each.

Caution: Insert the rear mounting plates under the desk frame.

<2> Pull out the upper paper tray of the stand/paper drawer until it

stops and attach the front mounting plates using a supplied
screw for each.
Then, remove the lock of the paper tray and close the tray.
Remove the locks of the middle tray and the lower tray simi-
larly.

<3> Reattach the paper tray of the main unit.

5) Connect the power supply I/F harness to the PCU PWB of the

main unit of the printer.

<1> Remove the screw that fixes the harness cover of the main

unit of the printer and slide the harness cover up to remove it.
Process the harness cover as shown in the illustration.

<2> Connect the power supply I/F harness connector (red, 22pin)

to CN11 (red connector) of the PCU PWB of the main unit of
the printer.

Connect the connector (white, 4pin) of power supply I/F har-
ness to the I/F connector  (white, 4pin)  of the main unit.

Remove the M4 screw shown in the illustration, insert the cir-

cle terminal of ground harness, and it fixes again.

Rear mounting plate

Rear mounting plate

Screw

Screw

Desk frame

Mounting plate

Screw

Screw

Front
mounting plate

Front mounting
plate

Harness cover

Cut out.

Screw

Connector

CN11

AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 7

<3> Reattach the harness cover to its original position and fix it

with the removed screw.
At this time, ensure that the power supply I/F harness is
arranged as shown in the illustration.

• Fix the harness securely to the wire saddle.

6) Adjust the position of the paper guides of the upper paper tray

of the stand/paper drawer.
Refer to "Setting and adjustment" described later.

7) Carry out the off center adjustment.

1) Turn off the main switch of the main unit of the printer.

Turn the main switch located on the front side of the main unit
to the "OFF" position.
Then, remove the power plug of the main unit from the outlet.

2) Put the main unit of the printer on the multi purpose drawer.

<1> Pull out the paper tray of the main unit until it stops and then

remove it by lifting both ends of the tray.

<2> Hold the main unit of the printer at the positions shown in the

illustration and put the main unit on the multi purpose drawer
so that the front side and the left side of the main unit are
aligned to those of the multi purpose drawer.

Caution: For installation of the main unit, it must be held by two

persons and installed without haste.

3) Connect the main unit of the printer to the multi purpose

drawer.

<1> Attach the rear mounting plates using a supplied screw for

each.

Caution: Insert the mounting plate under the desk frame.

Wire saddle

Harness cover

Power supply
I/F harness

Screw

Wire saddle

Front mounting plates:

 2 pcs.

Rear mounting plates:

 2 pcs.

Screws (M4x8): 

4 pcs.

"OFF"

Rear mounting plate

Rear mounting plate

Screw

 Screw

Tray frame

Mounting
 plate

AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 8

<2> Pull out the paper tray of the multi purpose drawer until it

stops and attach the front mounting plates using a supplied
screw for each.
Then, remove the lock of the paper tray and close the tray.

<3> Reattach the paper tray of the main unit of the printer.

4) Remove the multi rear cabinet.

<1> Remove the two screws that secure the multi rear cabinet.

<2> Remove the two screws that secure the Harness protection

sheet.

<3> Remove the filament tape that secure the the power supply I/

F harness.

5) Connect the harness to the main unit of the printer.

<1> Remove the screw that fixes the harness cover of the main

unit of the printer and then slide the harness cover up to
remove it.
Process the harness cover as shown in the illustration.

<2> Connect the connector of the relay harness of the multi pur-

pose drawer to the connector of the PCU PWB of the main
unit of the printer.

Screw

Screw

Front mounting plate

 Front
 mounting plate

Multi rear cabinet

Screw

Screw

 Harness cover

Screw

Cut out.

CN10

Connector

AR-M351U/M451U, AR-M355U/M455U  UNPACKING AND INSTALLATION  6 - 9

<3> Connect the connector (white, 4pin) of power supply I/F har-

ness to the I/F connector  (white, 4pin)  of the main unit.
Connect the power supply I/F harness connector (red, 22pin) to 
CN11 (red connector) of the PCU PWB of the main unit of the
printer.
Remove the M4 screw shown in the illustration, insert the cir-
cle terminal of ground harness, and it fixes again.

∗

For installation of a finisher or a mail-bin stacker, see its installa-
tion manual.

6) Attach the harness cover.

Reattach the harness cover to its original position and fix it
with the removed screw.
At this time, ensure that the power supply I/F harness is
arranged as shown in the illustration.

• Fix the harness securely to the wire saddle.

∗

If another peripheral device must be installed, carry out the fol-
lowing step at the end of the installation work.

7) Adjust the position of the paper guides of the paper tray.

Refer to "Setting and adjustment" described later.

8) Carry out the off center adjustment.

1) Attach the rack to the desk unit. 

★

Be sure to identify the left and the right racks. Refer to the fig-
ure below.

Insert the rack boss into the rack mounting hole (made by
removing the mold of the desk unit), and fix each rack with two
fixing screws (M5 x 70).

2) Attach the rack bottom plate.

Connector

CN11

Wire saddle

Harness cover

Screw

Wire saddle

Rack sheet

Rack with the 
rack sheet 
attached to it

Cam

Rack with the 
cam attached 
to it

Rack mounting hole

Boss

Boss

Rack mounting hole

Fixing screws
(M5x70)