Boss 644UA Owner's Manual

1

644UA

OWNER’S MANUAL

Mobile Audio System

y PLL Synthesizer Stereo Radio
y CD/MP3/WMA Player
y Automatic Memory Storing
y Full Detachable Panel
y Preset Equalization
y Electronic Shockproof (ESP) Function
y Memory Card Interface
y USB Interface
y Auxiliary Input Function
y Remote Control

2

CONTENTS

Installation...........................................3

Take out screw before installation.........3

DIN Front-Mount (Method A).................3

Installing the unit ...............................3

Removing the unit .............................4

DIN Rear-Mount (Method B).................5

Using the detachable front panel ......6

Wiring Connection..............................7

Operation.............................................8

Location of keys....................................8

Switching on/off the unit........................9

Faceplate release .................................9

Sound adjustment.................................9

System setting......................................9

Loudness..............................................9

Set the clock.........................................9

Display information...............................9

Equalization..........................................9

Liquid crystal display.............................9

Remote sensor .....................................9

ESP function.........................................9

Auxiliary input .......................................9

Reset function.......................................9

Radio operation ....................................10

Switching to radio mode....................10

Selecting the frequency band............10

Selecting station................................10

Automatic memory storing&

program scanning .............................10

Station storing ...................................10

Mono/Stereo......................................10

CD/MP3/WMA operation.......................10

Switching to CD mode.......................10

Selecting tracks.................................10

Pausing playing.................................10

Previewing tracks..............................11

Playing tracks in random...................11

Ejecting a disc...................................11

Special function for MP3/WMA disc...11

USB play operation...............................12

Memory card operation.........................12

Disc notes.............................................12

Remote control....................................14

Specification........................................15

Trouble shooting.................................16

Repeating tracks...............................11

Basic operation.....................................9

3

INSTALLATION

Notes:

y Choose the mounting location where

the unit will not interfere with the normal
driving function of the driver.

y Before finally installing the unit, connect

the wiring temporarily and make sure it
is all connected up properly and the
unit and the system work properly.

y Use only the parts included with the

unit to ensure proper installation. The
use of unauthorized parts can cause
malfunctions.

y Consult with your nearest dealer if

installation requires the drilling of holes
or other modifications of the vehicle.

y Install the unit where it does not get in

the driver’s way and cannot injure the
passenger if there is a sudden stop, like
an emergency stop.

y If installation angel exceeds 30° from

horizontal, the unit might not give its
optimum performance.

y Avoid installing the unit where it would

be subject to high temperature, such as
from direct sunlight, or hot air, from the
heater, or where it would be subject to
dust, dirt or excessive vibration.

DIN FRONT/REAR-MOUNT

This unit be can properly installed either
from “Front” (conventional DIN Front-mount)
or “Rear”(DIN Rear-mount installation,
utilizing threaded screw holes at the sides
of the unit chassis). For details, refer to the
following illustrated installation methods.

TAKE OUT SCREW BEFORE INSTALLATION

Before install the unit, please remove the
two screws.

DIN FRONT-MOUNT (Method A)

Installation Opening
This unit can be installed in any dashboard
having an opening as shown below:

Installing the unit
Be sure you test all connections first, and
then follow these steps to install the unit.

1. Make sure the ignition is turned off, and

then disconnect the cable from the
vehicle battery’s negative (-) terminal.

2. Disconnect the wire harness and the

antenna.

3. Press the release button on the front

panel and remove the control panel
(see the steps of “removing the front
panel”).

4. Lift the top of the outer trim ring then pull

it out to remove it.

5. The two supplied keys release tabs

inside the unit’s sleeve so you can
remove it. Insert the keys as far as they
will go (with the notches facing up) into
the appropriate slots at the middle left
and right sides of the unit. Then slide
the sleeve off the back of the unit.

30

Take out screw
before installation.

4

INSTALLATION

(1) Front panel; (2) Outer trim ring;
(3) Sleeve; (4) L key; (5) R key

6. Mount the sleeve by inserting it into the
opening of the dashboard and bend
open the tabs located around the sleeve
with a screwdriver. Not all tabs will be
able to make contact, so examine which
ones will be most effective. Bending
open the appropriate tabs behind the
dashboard to secure the sleeve in
place.

(1) Dashboard (2) Taps

7. Reconnect the wire harness and the
antenna and be careful not to pinch any
wires or cables.

8. Slide the unit into the sleeve until it
locks into place.

9. To further secure the unit, use the
supplied metal strap to secure the back
of the unit in place. Use the supplied
hardware (Hex Nut (M5mm) and Spring
Washer) to attach one end of the strap
to the mounting bolt on the back of the
unit. If necessary, bend the metal strap

to fit your vehicle’s mounting area. Then
use the supplied hardware (Tapping
Screw and Plain Washer) to attach the
other end of metal strap to a solid metal
part of the vehicle under the dashboard.
This strap also helps ensure proper
electrical grounding of the unit.
Note to install the short threading terminal
of the mounting bolt to the back of the unit
and the other long threading terminal to
the dashboard.

(1) Metal Strap; (2) Mounting Bolt;
(3) Hex Nut; (4) Spring Washer;
(5) Tapping Screw; (6) Plain Washer

10. Reconnect the cable to the vehicle
battery’s negative (-) terminal. Then
replace the outer trim ring and install the
unit’s front panel (see the steps of
“Installing the front panel”).

Removing the unit

1. Make sure the ignition is turned off, then

disconnect the cable from the vehicle
battery’s negative (-) terminal.

2. Remove the metal strap attached the

back of the unit (if attached).

3. Press the release button to remove the

front panel.

4. Lift the top of the outer trim ring then pull

it out to remove it.

5

INSTALLATION

5. Insert both of the supplied keys into the
slots at the middle left and right sides of
the unit, then pull the unit out of the
dashboard.

DIN REAR-MOUNT (Method B)

If your vehicle is a Nissan, Toyota, follow
these mounting instructions.
Use the screw holes marked T (Toyota), N
(Nissan) located on both sides of the unit to
fasten the unit to the factory radio mounting
brackets supplied with your vehicle.

Dashboard or Console

Screw

Factory Radio
Mounting Bracket

Side View showing
Screw Holes marked
T, N

Screw

To fasten the unit to the factory radio
mounting brackets.
Align the screw holes on the bracket with
the screw holes on the unit, and then
tighten the screws (5x5mm) on each side.

Note: The outer trim ring, sleeve and the
metal strap are not used for method B
installation.