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Parts marked with “

“ are important for maintaining the safety of the machine. 

To maintain the safety and performance of the machine, use the replacement parts specified.

CODE : 00ZM300NEUA1E

This model is a modified version of the AR-M350U/M350N, providing a different printing speed.

This Service Manual, therefore, describes only the different points from the AR-M350U/M350N and supplementary items.
For items which are not described in this Service Manual, refer to the following Service Manuals and Parts Guides. 

•AR-M350/M450

Service Manual : 00ZARM350/A1E

Parts Guide : 00ZARM450/P1E

Circuit Diagram : 00ZARM350/C1/

•AR-P350/P450

Service Manual : 00ZARP350/A2E

Parts Guide : 00ZAR350LPP1/

Circuit Diagram : 00ZARP350/C1/

•AR-M350U/N•AR-M450U/N

Service Manual : 00ZARM350UA1E

•AR-NC5J

Service Manual : 00ZARNC5J/A1E

AR-M350U

AR-M300U

AR-M350N

AR-M300N

Remark

Base
specifications

Print speed

35PPM

31PPM

35PPM

31PPM

Engine speed

Network printer 
function

Option

(AR-NC5J and AR-P14 are required.)

Standard

Hardware

Network board

Option

(AR-P14 is required.)

Standard

AR-NC5J

LSU

35PPM exclusive use 31PPM exclusive use 35PPM exclusive use 31PPM exclusive use

PCU

35PPM exclusive use 31PPM exclusive use 35PPM exclusive use 31PPM exclusive use

Controller PWB

STD controller

MFP controller

Consumable
parts

OPC drum

Common use

Developer

Common use

Toner cartridge

Common use

       

Wave length

785 nm

+10 nm

−

15 nm

Pulse times

North America:

35 cpm model: (4.1 µs ± 4.1 ns)/7 mm

45 cpm model: (5.7 µs ± 5.7 ns)/7 mm

Europe:

35 cpm model: (3.8 µs ± 3.8 ns)/7 mm
45 cpm model: (4.4 µs ± 4.4 ns)/7 mm

Output power

0.2 mW - 0.4 mW

At the production line, the output power of the scanner unit
is adjusted to 0.4 MILLIWATT PLUS 8 % and is maintained
constant by the operation of the Automatic Power Control (APC).

 

Caution
This product contains a low power laser device. To ensure
safety do not remove any cover or attempt to gain access
to the inside of the product. Refer all servicing to qualified
personnel.

CAUTION
VORSICHT
ADVARSEL
ADVERSEL
VARNING
VARO!

INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED. 
AVOID EXPOSURE TO BEAM.

Laserstrahl

UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET UND 
SICHERHEITSVERRIEGELUNG ÜBERERÜCKT. NICHT DEM STRAHL AUSSETZEN. 

USYNLIG LASERSTRÅLING VED ÅBNING, NÅR SIKKERHEDSAFBRYDERE ER 
UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR STRÅLNING.

USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS BRYTES.
UNNGÅ EKSPONERING FOR STRÅLEN.

OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR ÄR 
URKOPPLADE. STRÅLEN ÄR FARLIG. BETRAKTA EJ STRÅLEN. 

AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NÄKYMÄTÖNT
LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN. 

For Europe:

CLASS 1 LASER PRODUCT

LASER KLASSE 1

LUOKAN 1 LASERLAITE

KLASS 1 LASERAPPARAT

INVISIBLE LASER RADIATION 
WHEN OPEN  INTERLOCKS 
DEFEATED. AVOID EXPOSURE 
TO BEAM.

UNSICHTBARE 
LASERSTRAHLUNG WENN 
ABDECKUNG GEÖFFNET UND 
SICHERHEITSVERRIEGELUNG 
ÜBERBRÜCKT. NICHT DEM 
STRAHL AUSSETZEN.

USYNLIG LASERSTRÅLNING 
VED ÅBNING, NÅR 
SIKKERHEDSBRYDERE ER 
UDE AF FUNKTION. UNDGÅ 
UDSAETTELSE FOR 
STRÅLNING.

LAITTEEN KÄYTTÄMINEN 
MUULLA KUIN TÄSSÄ 
KÄYTTÖOHJEESSA 
MAINITULLA TAVALLA SAATTAA 
ALTISTAA KÄYTTÄJÄN 
TURVALLISUUSLUOKAN 1 
YLITTÄVÄLLE 
NÄKYMÄTTÖMÄLLE 
LASERSÄTEILYLLE.

OM APPARATEN ANVÄNDS PÅ 
ANNAT SÄTT ÄN I DENNA 
BRUKSANVISNING 
SPECIFICERATS, KAN 
ANVÄNDAREN UTSÄTTAS FÖR 
OSYNLIG LASERSTRÅLNING, 
SOM ÖVERSKRIDER GRÄNSEN 
FÖR LASERKLASS 1.

For North America:

This Digital Equipment is rated Class 1 and complies with 21 CFR 1040.10 and 1040.11 of the
CDRH standards. This means that the equipment does not produce hazardous laser radiation. For
your safety, observe the precautions below.

●

Do not remove the cabinet, operation panel or any other covers.

●

The equipment's exterior covers contain several safety interlock switches. Do not bypass any
safety interlock by inserting wedges or other items into switch slots.

Caution
Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.

 !     

AR-M300N CONFIGURATION 3-1

Category

Model Name

Other options required for the installation/mounting. 

(Options must be ordered separately.)

Remarks

MFP model (35ppm)

AR-M350

• B/W Scanner module/DSPF (AR-EF1)
• Scanner Rack(AR-RK1)

• Stand/MPD&2000 sheet paper drawer (AR-D13) or 

Three paper drawer stand (AR-D14) with 
Power supply unit (AR-DC1) or 

Stand/MPD & 2000 sheet paper drawer include the Power supply 

unit (AR-D20) or 
Stand/3 x 500 sheet paper drawer include the Power supply unit 

(AR-D15)

MFP model (45ppm)

AR-M450

MFP model (31ppm) (Without network printer function) AR-M300U

MFP model (35ppm) (Without network printer function) AR-M350U

MFP model (45ppm) (Without network printer function) AR-M450U

MFP model (31ppm) (With NIC card (standard))

AR-M300N

MFP model (35ppm) (With NIC card (standard))

AR-M350N

MFP model (45ppm) (With NIC card (standard))

AR-M450N

      !"#$%%&

AR-M300N CONFIGURATION 3-2

As shown in the table below, some other peripheral devices ( B ) may be needed for installation of a peripheral device ( A ) and some peripheral devices
cannot be installed together.

Related for scanner feature

Related for paper feed unit

B/W scanner module/DSPF

AR-EF1

AR-RK1

AR-D14

AR-D13

AR-D15

AR-D20

AR-DU4

AR-DU3

AR-FN7

AR-FN6

AR-MS1

AR-TE3

AR-TE4

AR-PN1

AR-PK1

AR-NS2

AR-FX5

AR-MM9

AR-DC1

AR-HD3

AR-M11

AR-NC5J

AR-P14

Scanner rack

Scanner r

a

c

k

Stand/3 x 500 sheet 
paper drawer

Stand/MPD & 2000 sheet 
paper drawer

Stand/3 x 500 sheet paper drawer 
include Power suuply unit

Stand/MPD & 2000 sheet paper drawer 
include Power suuply unit

Stand/3 x 500 sheet paper drawer

 

include Power suuply unit

Stand/MPD & 2000 sheet paper drawer

 

include Power suuply unit

Saddle stitch finisher

Finisher

Mail-bin stacker

Exit tray

Punch unit

PS3 expansion kit

Facsimile expansion kit

Pr

Network printer kit

int server card

Hard disk drive

Power supply unit

Duplex module/bypass tray

Duplex module

Stand/3 x 500 sheet paper dr

a

w

er

Stand/MPD & 2000 sheet 

Duple

x module/b

ypass tr

a

y

Duple

x module

Upper exit tray extension

Multi-function controller
board

Fax memory (8 MB)

B/W scanner module/DSPF

Saddle stitch finisher

Finisher

Mail-bin stac

k

e

r

Exit tr

a

y

Punch unit

PS3 e

xpansion kit

F

acsimile e

xpansion kit

Pr

int ser

v

er card

Hard disk dr

Network printer kit

iv

e

P

o

w

er supply unit

Upper e

xit tr

a

y

 e

xtension

Multi-function controller board

F

ax memor

y (8 MB)

Network scanner 
expansion kit

Netw

or

k scanner e

xpansion kit

*

1

*

2

*

2

*

3

*

3

*

1

*

1

*

1

*

1

*

1

*

1

*

1

*

1

*

1

*

1

*

1

*

1

*

2

*

1

*

1

*

1

Output units

Related for extension of
functions and others

= Must be installed together.

= Any of the units must be installed together.

= Must be installed for installation of the stand/3 x 500 sheet paper drawer or 
   the stand/MPD & 2000 sheet paper drawer.

= Cannot be installed together.
= Standard
= AR-DU4 Standard
= Attachment of the AR-P14 provides the similar functions.

A

B

*4

*5

*6

*3
*4
*5

= Not Available

*6

 '     !"#$%%&