Boss Audio Systems 748UAI User manual

4
10 R - 03 1817

The following illustration shows a typical installation. If you have any questions or require information
regarding installation kits, consult your customer car audio dealer or a company suppling kits.
If you are not sure how to install this unit correctly, have it installed by a qualified technician.
Remove the unit
Trim Plate
4
182mm
53 mm
1
2
3
Screw
Dashboard
Sleeve
Bend the appropriate
tabs to hold the sleeve
firmly in place.
Trim
Plate
Control
Panel
To attach the front panel back to the unit chassis,
please insert the right side of the panel in the chassis
until it is correctly engaged. Press the left side of the
panel until the mechanism locks it into place.
1
1. Press the Panel Release button.
2. Push the left side of the panel rightward
3. Pull the panel towards you to disengage it from the chassis.
Release
E - 1
1. INSTALLATION

Wiring Diagram
REAR LINE OUT R-CH
REAR LINE OUT L-CH
AMP
ANTENNA
JACK
REAR
L
R
FUSE
FRONT LINE OUT
AUX-IN
YELLOW
BLACK
WHITE
WHITE
RED
RED
CONNECTOR
ISO
SUBWOOFER BLUE
FUSE
1
2
3
4
5
6
7
8
4
5 7
8
A
B
ISO CONNECTOR WIRING CHART
YELLOW
WIRE COLOR
VIOLET/BLACK
GREY/BLACK
WHITE/BLACK
VIOLET
WHITE
GREY
B1
B5
B4
B3
B2
GREEN
GREEN/BLACK
B7
B8
B6
A5
A4
PIN
BLACK
A8
REDA7
BLUE
LEFT FRONT SPEAKER (-)
LEFT REAR SPEAKER (+)
LEFT REAR SPEAKER (－)
RIGHT REAR SPEAKER (+)
RIGHT FRONT SPEAKER (+)
LEFT FRONT SPEAKER (+)
RIGHT FRONT SPEAKER (-)
RIGHT REAR SPEAKER (-)
FUNCTION/LABEL
CONNECT TO SYSTEM CONTROL
TERMINAL OF THE POWER AMP OR
AUTO ANTENNA RELAYCONTROL
TERMINAL(max 150mA 12VDC)
BATTERY(+)
IGNITION(ACC)
GROUND
Figure 2
2. CONNECTING THE SYSTEM
E - 2

3. THE MAJOR FUNCTION OF THIS UNIT
E - 3
No. Item Decriptions
LOC
BAND
Short press this button to change between BAND
FM1,FM2,FM3, AM1(MW1) or AM2 (MW2).
1
2
3
4
5
6
7
Press this button to open the control panel.
Press this button adjust the tuner sensitivity if
you want to receive more radio stations or only
stations with strong signal.
[LOCAL]: only stations with strong signal can
be recevied.
[DISTANCE]: Stations with strong and weak
signals can be recevied.
AUDIO
(Power)
Press this button or any other button on the front
panel (except Release/Eject) to turn the unit on.
Press this button again to turn the unit off.
MUTE
Press this button to turn the Mute On/Off.
(Release)
VOLUME KNOB
Rotate the encoder volume to increase and
decrease the volume.
(Audio Menu)
(Local/Distance)
BROWSE
Under Media playback mode, press this button to
confirm the selection.
ENTER
17
2
3
3
4
56
8
910 11
12 13
14 15 16
Press to access into the Audio Menu mode to
adjust the below options:
BASS(Bass Level) / TRE (Treble Level) / BAL
(Balance) / FAD (Fader) / EQ(Preset Equalizer)
/xBAS(iX-Bass)
Under Media playback mode, press to access into
the music folder / file searching mode.
Under iPhone / iPode mode, press this button to
access into the Playlist, Artist, etc searching mode.

Under Media playback mode, press and hold
momentarily to fast forward /backward.
Under Radio mode, press these buttons to
enter into the Auto Seek mode, press and hold
these buttons to enter into the Manual Seek mode.
Under Media playback mode, press these buttons
to skip a chapter / track / scene / file.
FILE UP
/DOWN
TUNE UP
/DOWN
FAST FORWARD
/BACKWARD
11
E - 4
8EQ
Press to select the preset equalizer setting：
EQ OFF -> POP -> USER -> TECHNO ->
ROCK -> CLASSIC -> JAZZ -> VOCAL
Press to quick return previous menu or mode.
ESC
9
Press SOURCE button to select a different mode of
playback mode: Radio, CD play,USB(USB iPod), SD
and Aux In．
SOURCE
10
Press this button to turn On or Off the iX-BASS
booster function.
Under Tuner mode, press this button briefly to
display the Clock time.
Press this button to eject the Disc.
Press to access into the System Menu mode.
Under iPod/iPhone mode, press to access into the
iPod/iPhone control mode.
Under Tuner mode, short press the Numeric
buttons to recall the preset stations. Hold press
the Numberic buttons to store the listening station.
Under Media playback mode,press the Numeric
buttons to perform the below operation：
Under Media playback mode, press this button
repeatedly to display ID3 information: Track number
and play time ->folder ->file ->title ->artist ->album
- > c l o c k . .
PRESET
NUMERIC
BUTTONS
Press and hold this button to turn On or Off the
Subwoofer function.
SUBW
XBS
INFO
EJECT
MENU
13
14
15
16
12
(Subwoofer)
Number
Button
561 2 3 4
Pause/Play INT RPT
RDM
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