Nakamichi NA-250-BTR Owners Manual

NA250BTR

Car Audio System Player

INSTRUCTION MANUAL

CD MP3 WMA USB SD

AUX-IN BT

Safety

WARNING

Stop the car before operating the unit.

Important to know...

To prevent a short circuit, never put or leave any metallic objects
(suchascoinsormetaltools)insidetheunit.

Caution: Adjust the volume so that you can hear sounds

outside the car
accident

Condensation: When the car is air conditioned, moisture may

collect onthelaserlens.This maycausediscreaderrors.Inthiscase,
removethediscandwaitfor themoisturetoevaporate.

The illustrationsin this manual are examples usedto explain more
clearly how the controls are used. Therefore, what appears on the
illustrations may differ from what appears on the actual
equipment.

. Driving with the volume too high may cause an

.

To prevent deterioration, do not touchthe terminals of the unitand
faceplatewithyourfingers.

How to reset your unit

1

2

Ifthisunitfailstooperateproperly,pressthe resetbutton.

Theunitreturntofactorysettingwhentheresetbuttonispressed.

3

Reset

If you experience problems during installation, consult your
Nakamichidealer.

When you purchase external components, check with your
Nakamichi dealerto makesurethattheyworkwithyourmodeland
inyourarea.

Maintenance

Cleaning the unit: Wipe off the dirt on the panel with a dry silicon or
soft cloth. Failure to observe this precaution may result in damage to
themonitororunit.

Cleaning the connector:Wipeoff dirt on the connectorof the unitand
faceplate.Usea cottonswaborcloth.

Preparation

How to attach/detach the faceplate

Attach Detach

What’s in the box

Checkandidentifythecontentsofyourpackage:

Main unit

(with sleeve)

Carrying case

(for front panel)

Front panel

Remote

control

Trim plate

ISO male

connector

1

1

2

2

Do not expose the faceplate to direct sunlight, excessive heat, or
humidity.Also avoidplaceswith toomuch dustor thepossibility of
watersplashing.

Keepthefaceplateinitscasingwhiledetached.
The faceplate is a precision piece of equipment and can be

damagedbyshocksorjolts.

Disassembly tool

(2pcs)

Screw x 4pcs

User manual

Highlight Features

Thisunitis allowedtoconnect the5Vpreout
forSubwoofer.

BA D

SRC

NU

RD

DBSS

XBASS

EQ

UBW

23 45 61

AUX N

Thisunit isequipped with
varablecolordisplay/illumination.

BAND

SRC

MENU

VRD

BAND

SRC

VRD

MENU

DBSS

SUB W

XBASS

EQ

DBSS

XBASS

EQ

SUB W

23 45 61

MOSFET4x50W

AUX IN

Thisunitis allowedtoconnect the5Vpreoutfor Rear
andFrontRCALine Out.

DBSS

SRC

M NU

VRD

XBASS

EQ

SUB W

23 45 61

AUX N

Under Disc/USB/SD/iPod/iPhone playback mode,
press buttons first, andthen press and
hold buttonswithin one second, it is

/

/

can be access into quick music file access track
or fileup/down browsefeature.

EN 3

Installation /Connection

Basic Procedure

1 Remove the key from the ignition switch, then disconnect

the terminal of the car battery.

2 Make proper input and output wire connections.
3 Install the unit to your car.
4 Reconnect the terminal of the car battery.
5 Reset the unit.

Warning

The unitcan onlybeinstalled inacar witha12VDC power supply, negative
ground.

If you connect theignition wire(red) andthe battery wire (yellow) tothe car
chassis (ground), you may cause a short circuit, that in turn may start a fire.
Alwaysconnect thosewirestothepower sourcerunning throughthefuse box.

Disconnect the battery’s negative terminal and make all electrical
connections beforeinstallingtheunit.

Insulate unconnected wires with vinyl tape or other similar material. To
prevent a short circuit, do not remove the caps on the ends of the
unconnected wiresortheterminals.

Be sure to ground this unit to the car’s chassis again after installation.
If the power is not turned ON, the speaker wire may have a short-circuit or

touched the chassis of the vehicle and the protection function may have
been activated.Therefore,thespeakerwire shouldbe checked.

Caution

If your car’s ignition does not have an ACC position, connect the ignition
wirestoa powersourcethat canbeturned on andoff withtheignition key. If
you connect the ignition wire to a power source with a constant voltage
supply,as withbatterywires,the batterymaydie.

Install this unit in the console of your vehicle. Make sure the faceplate will
not hit the lid of the console (if any) when closing and opening.

After the unitis installed, check whetherthe brakelamps,blinkers,wipers,
etc.onthecar areworkingproperly.

Mount the unit so that the mounting angle is 30° or less.
If thefuse blows, first make surethe wires arenottouching tocause a short

circuit,thenreplace theoldfuse withonethathas thesamerating.
Connect the speaker wires correctly to the terminals to which they

correspond. The unit may be damaged or fail to work if you share
the wiresorgroundthem toanymetal part inthe car.

When only two speakers are being connected to the system, connect the
connectors either to both the front output terminals or to both the rear
output terminals(do notmix frontand rear).

Mounting and wiring this product requires skills and experience. For
safety’ssake, leave thiswork toprofessionals.

If you experience problems during installation, consult your Nakamichi
dealer.

Wiring Connection

ISO Connector

Front RCA Output (Left)

1234567

B

8

Rear RCA
Output (Left)

5 7

A

4

8

L

FRONT

REAR

R

Front RCA Output (Right)Rear RCA Output (Right)

ISO Connector Wiring Chart

Pin Color and function Pin Color and function

A4

A5

Yellow

Blue

Battery(+)

Connect to system control
of the power AMP or auto antenna
relaycontrol terminal(Max150MA 12VDC)

terminal

B1/B2

B3/B4

Violet

Grey

Subwoofer
Output

+

/ Violet/Black

/ Grey/Black

+

FM/AM Antenna Socket

Antenna Jack n( ot included)

RCA toRCA Cable

(not included)

Right rear speaker

Right front speaker

A7

A8

4 EN

Red
Black

Ignition(ACC)

Ground

B5/B6

B7/B8

White
Green

+

/ White/Black

+

/ Green/Black

Left front speaker
Left rear speaker