Boss Audio Systems MR400UAB User manual

CONTENTS
ii
Bluetooth Operation.................................................................................................................................... 6
Pair and Connect ................................................................................................................................... 6
Make a Call ............................................................................................................................................ 6
Redial Last Dialed Number ................................................................................................................... 6
Answer a Call......................................................................................................................................... 6
End a Call .............................................................................................................................................. 6
Switch Audio Between Car and Phone .................................................................................................. 6
Adjust Talk Volume................................................................................................................................. 6
Audio Streaming (A2DP)......................................................................................................................... 6
Precautions................................................................................................................................................. 1
Take Precaution......................................................................................................................................1
Installation ............................................................................................................................................... 2-3
Remove of the Main Unit
........................................................................................................................3
Wiring Connections................................................................................................................................ 3
Control Panel Button Locations.................................................................................................................. 4
Operation .................................................................................................................................................4-5
Power / SRC ........................................................................................................................................... 4
Troubleshooting..........................................................................................................................................
7
.............................................................................................................................................
8
Installation Procedures
Installation Opening
..........................................................................................................................
................................................................................................................................
2
2
4
Adjust Volume (VOL)
.........................................................................................................
....................................................................................................................
4
.............................................................................................................................. 4
Set the Clock (CLK)
Change the Source (SRC)
............................................................................................................................. 5
Reset System (RESET)
.................................................................................................5
......................................................................................................................5
Switch Between US and EU Frequency
...................................................................................................................5
Change Bands (BAND).......................................................................................................................... 5
Manual Tuning ( / )
.............................................................................................................5
5
Auto Seek Tuning ( / )
Automatic Music Search (AMS)
..........................................................................................................................................
Store/Recall Preset Stations (1 - 6)
.......................................................................................................................................... 5
AUX In Jack
......................................................................................................................... 6
Track Search
4
4
...........................................................................
Play/Pause, Intro, Repeat, Random, Tracks playback
Track/Folder Navigation
5
5
...............................................................................................................................
........................................................................................................................
........................................................................................................................
Next/Previous Track
Fast Forward/Backward
............................................................................................................................................. 5
Insert USB
...................................................................................................................................................... 4
Mute

PRECAUTIONS
Take Precaution
•
•
•
•
•
• Be sure to lower the volume before switching off the unit or the ignition key.
Some MP3/WMA files may not be playable.
1

INSTALLATION
2
Installation Procedures
Installation Opening
First complete the electrical connections and then check for correctness.
This unit can be installed in any dashboard Having an opening as shown below.
Insert mounting collar into the dashboard and bend the mounting tabs out with a screwdriver.
Make sure that lock lever is flush with the mounting collar( not projecting outward).
2.05 inch
7.20 inch
MOUNTING SLEEVE

INSTALLATION(CONT.)
3
- Only use speakers with 4 ohms impedance.
- The maximum current of the auto antenna is 200mA.
Wiring Connections
!
Removal of the Main Unit
1. Remove the plastic trim out from the main unit.
2. Insert a bracket key into the left and right side of the main unit and draw the unit out of
the mounting sleeve.
WIRING
DIAGRAM
CAUTION
+12V DC
NEGATIVE
GROUND
15
Radio Antenna
15A
Purple +
Rear Left Speaker
Front Left Speaker
White +
Green +
Green/Black -
White/Black -Gray/Black -
Gray +
Front Right Speaker
Purple/Black -
Rear Right Speaker ACC + (Red)
GND - (Black)
ANT + (Blue)
Power B + (Yellow)
White:Front Left PRE-AMP Output
White: Rear Left PRE-AMP Output
Red: Front Right PRE-AMP Output
Red: Rear Right PRE-AMP Output

CONTROL PANEL BUTTON LOCATIONS
4
OPERATION
AUX IN,modes (if there are USB inside the unit).
1.POWER/SRC
to turn off the unit.
device, their respective logos will illuminate on the display.
radio , BT and Aux. When the user insert a USB flash memory
RADIO, USB, BT,
8. CLK/MUTE
Press and hold the CLK button once to display the real time, With time appearing on the display.
Press and hold the CLK button for more than 2 seconds until the hour flashes. You can adjust the HOUR
by pressing the button and button. Then press the CLK button briefly, the minute will flash, you
can adjust the MINUTE by pressing the button and button.
Finally press the CLK button to confirm the time adjustments.
During USB mode, press the ‘1/ ’ button to pause or resume music playback.
Press the ‘2/INT’ button to play the first 10 seconds of each track, press again to stop the introduction
scan, and play the current track.
Press the ‘3/RPT’ button to toggle between RPT ALL (Play all track), RPT FLR (Continuously repeats all
tracks in current folder) and RPT ONE (Continuously repeats current track).
Press the ‘4/RDM’ button to play all tracks in random order, press again to cancel random playback.
flash on the LCD

OPERATION
5
15. RESET
To reset all parameters to factory default values. Use a subject with a sharp point end to thrush the
RESET hole.
9. USB Port
Rotate the volume knob to increase or decrese the volume level of the sound output.
Press the SEL button repeatedly to cycle through the following adjustable audio functions:
ILL MID/HI/LOW, BASS, TREBLE, BALANCE, FADER, EQ OFF, CLASS/ROCK/POP/ FLAT,
LOUD ON/OFF, DX/LOC, STEREO/MONO, CLOCK 12/24, AREA US/EU.
• Rotate the VOL knob to adjust the selected item.
- ILL MID/HI/LOW: This receiver is equipped with 3 brightness settings.
Rotate the volume knob to preset the illumination to middle, high or low.
- BASS: -7, -6, ~, -1, 0, +1, ~, +6, +7
- TREBLE: -7,-6, ~, -1, 0,+01,~, +6, +7
- BALANCE: L7, L6,~, L1, 0, R1,~,R6, R7
- FADER: R7,R6, ~, R1,0, F1,~,F6, F7
- EQ(Equalizer) Setting: OFF, CLASS, ROCK, POP, FLAT
- Loudness: LOUD ON/OFF
- DX/LOCAL: Enables or disables the local broadcast mode (LOCAL).
- Stereo/Mono: Switches between MONO and STEREO reception mode for radio frequencies.
- CLOCK 12/24: Select between 12 hours and 24 hours display.
Note: If 12 hour display is selected , AM= Morning; PM= Afternoon
- AREA US/EU: This car radio is equipped the USA / Europe frequency.
Rotate the volume knob to switch between USA and Europe frequency.
The system will change the frequency setting in about 3 seconds.
11.FF( ) &12.FB( )
In the radio mode:
Long press the or button for more than 2 seconds, the unit will switch to manual tuning
mode, briefly press the or button to search the next or previous frequency step by step.
Short press the or button, the automatic search will start, it will search upward or downward
for the strong signal radio station within the cuttent band. The auto searching will stop until find a
station.
14. AUX IN JACK
13.BND/AMS
In radio mode,short press the BND/AMS button repeatedly to select the one of the radio band : FM 1,
FM 2,FM 3, AM1,AM2 in a cycle sequence. When you select a band, the word F1、F2、F3 for FM band,
and A1, A2 for AM band will be shown on the LCD display.
Press the BND/AMS check
During USB playback, press and hold the BND/AMS button to enter track search mode, the “TRK 0000”
will appear on the display. Rotate VOL knob to select the “first number”. Then press the button to
move the “first number” to the left and enter the next number. Finally press the SEL button to confirm
and play the selected track. If no any operation in 5 seconds,it will play the current track.
When the 6 strongest stations will be stored into
In the USB playback:
Briefly press the or button to play the the next or previou track.
Press and hold the or button to fast forward or fast backward.

6
BLUETOOTH OPERATION
Pair and Connect
Prior to using the Bluetooth device as a handsfree system for a Bluetooth-enabled mobile
phone for the time, you must pair and connect the two devices as follows:
1. In any mode, prior to pairing and connecting, the BT logo in the LCD indicating
that no device is connected. To begin pairing, enable BT mode on your mobile phone.
2. When the phone the car audio system, the BOSS MR400UAB will be displayed.
3. Choose the BOSS MR400UAB from the device list to pair and connect with the car audio
system. Upon the BT logo will stop
4. When pairing is complete, the mobile phone audio will automatically transfer to the car
audio system whenever a call is made or received, or when the mobile phone plays
music.
Make a Call
• To make a call, dial the call directly from the paired mobile phone.
Redial Last Dialed Number
Press and hold the button on the control panel to redial the last dialed phone number.
Answer a Call
•When the mobile phone is called, the incoming telephone number displays in the LCD.
•To receive the call, press the button on the control panel.
To reject an active call, press the button.
End a Call
Switch Audio Between Car and Phone
During a call, press the VOL knob/button to switch the audio source from the car audio
system back to your mobile phone.
Adjust Talk Volume
•During a call, use VOL knob to adjust the volume level.
•Use the MUTE button to mute sound.
Audio Streaming (A2DP)
1. Press the /SRC button to enter BT mode and display pause in the LCD.
2. When a mobile device is paired, music played through that device will automatically be
heard through the car audio system.
3. Press the or button to play the next or previous on the mobile phone.
4. Press the button to pause or resume music playback.
To reject a call, press the button.
Reject a Call

7
TROUBLESHOOTING
If you suspect something is wrong, immediately switch power off. Do not use the unit in
abnormal condition, for example without sound, or with smoke or foul smell, can cause fire or
electric shock.
Immediately stop using it and call the store where you purchased it. Never try to repair the
unit by yourself because it is dangerous to do so.
Turn you car's key to ACC or ON.
Check the connection.
Replace fuse.
Check volume or mute on/off, adjust volume to a desired level.
The installation angle is more than 30°.Adjust the installation angle less than 30°.
The built-in micro- computer is not operatingproperly due to noise. Press the RESETbutton
to restore the program to zero.
Station or signal is too weak. Select other stations of stronger signallevel.
Insert the antenna cable firmly into the antenna socket of this car radio.
Battery cable is not correctly connected. Connect the battery cable to the terminal that is
always live.
a) USB connection is not good. Take it out and insert again.
b) USB is damaged or no music file inside.Change to another USB, or record music inside it.
General
1) Car's engine switch is not on.
2) Cable is not correctly connected.
3) Fuse is burnt.
4) Volume is in mute or minimum.
5) Sound skips.
6) The operation keys do not work.
Radio
1) Much noise in broadcasts.
2) The antenna cable is not connected.
3) Preset station is reset.
USB
USB is connecting but no sound

8
SPECIFICATIONS
General
Power supply Requirement : DC 12V
Maximum power output : 50W X 4CH
Speaker impedance : 4 - 8 Ohm
Unit Dimensions(WxHxD) : 7.0 X 2.0 X 3.8 inch
Weight : 1.54 Lb (0.7 kg)
Fuse : 15 A
FM
Frequency Range USA / EUROPE: 87.5 MHz - 107.9 MHz / 87.5 MHz - 108.0MHz
Channel step: 200 KHz / 50 KHz
AM
Frequency Range USA / EUROPE: 530 KHz - 1710 KHz / 522-1620 KHz
Channel step: 10 KHz / 9 KHz
USB
RADIO
Usable Audio Formats MP3/WMA
Pre-amp Output Front and Rear
Frequency Response 20 Hz - 20 KHz
S/N Ratio 60dB
BT
BT Profile supports
Range of frequency
A2DP , AVRCP & HFP
2.4GHz spectrum
USB Port Type 2.0
USB Charging 5V/1A