Boss Audio Systems Car Stereo System MR637U User Manual

WIRES CONNECTION  
Preface  
Thank you for purchasing this car audio product.  
ANTENNA JACK  
Please read this manual carefully before operating this car audio product.  
Please keep this manual for future use. It will be helpful to you if you are encounter any  
operational problem.  
Selecting fine audio equipment is only the start of your musical enjoyment.  
Now it is time to consider how to maximize the enjoyment you will get from  
knowing how to work your new car stereo receiver.  
CONNECTOR A  
CONNECTOR B  
We hope you enjoy using this product and encourage you to always listen at  
a moderate, safe sound level to avoid any possible hearing damage or loss.  
If you listen to excessively loud sound over time, your hearing can adapt to  
higher volumes and what sounds "normal" to you may be quite harmful and  
can cause you to have permanent hearing loss. So please practice "safe sound"  
and always listen at moderate sound levels only.  
1.  
1. Rear Right Speaker (+)  
2. Rear Right Speaker (-)  
3. Front Right Speaker (+)  
4. Front Right Speaker (-)  
5. Front Left Speaker (+)  
6. Front Left Speaker (-)  
7. Rear Left Speaker (+)  
8. Rear Left Speaker (-)  
2.  
3.  
4. MEMORY +12V  
5. AUTO ANTENNA B+  
6.  
7. POWER B+  
8. GROUND  
Start with your volume control at the lowest setting, and slowly increase the level  
until you can hear it comfortably and clearly, free from distortion.  
SPECIFICATION  
GENERAL  
Once you have established this comfortable sound level, leave it there.  
Supply Voltage  
DC 12 V. Negative Ground  
Current Consumption  
Power Output  
Max.7A  
60Watts X 4ch  
WARNING!  
Number of channels  
Unit Dimensions  
2 Channels, Stereo  
178[W] X 165[D] X 50[H] mm.  
To reduce the risk of fire or electric shock, do not use the unit in the rain or moisture  
environment.  
FM SECTION  
Frequency range  
Effective sensitivity  
I.F Frequency  
87.5MHz -107.9MHz  
3uV.  
10.7MHz.  
To prevent direct exposure to laser beam, do not try open the enclosure.  
Visible and invisible laser radiation when open and interlocks defeated.  
AM SECTION  
Frequency range  
Effective sensitivity  
I.F Frequency  
530KHz - 1710KHz  
40dB.  
450KHz  
To protect our environment, do not dispose of electrical equipment in the domestic waste.  
Please return any electrical equipment that you will no longer use to the collection points  
provided for their disposal.  
RCA LINE OUT  
Output  
This helps avoid the potential effects of incorrect disposal on the environment and human  
health. This will contribute to the recycling and other forms of reutilization of electrical and  
electronic equipment. Information concerning where the equipment can be disposed of can  
be obtained from your local authority.  
1000mV @ CD MAX.  
CD PLAYER  
System  
Suitable CDs  
MP3 Audio System.  
MP3, WMA, CD,CD-R,CD-RW Disc  
20Hz - 20kHz +/- 3dB  
20Hz - 20kHz +/- 3dB  
-80dBA [1KHz]  
Frequency characteristics  
S/N Ratio to CD  
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LOCATION AND FUNCTION OF CONTROLS  
TROUBLE SHOOTING  
18  
4
5
8
11  
Before using the check list please make all the connections first.  
If you still have questions after going through the checklist, please consult  
your local customer service representative.  
14  
12  
1
Common Symptoms  
Cause  
Solution  
ST  
20  
13  
FLASH  
MUTE  
If the power supply is properly connected to  
the car accessory, switch the ignition key to  
" ON " or " ACC " .  
LOUD  
The car ignition is switched off.  
16  
MP3/CDR/RW PLAYBACK  
There is no power.  
Replace another fuse according to the wiring  
diagram.  
The fuse has blown.  
The CDs cannot  
be loaded.  
Remove the disc in the player then put a new  
upward  
Presence of CD disc inside the player  
2
10  
3
6
7
15  
9
The CDs are loaded The transport screws have not been Remove the transport screws before using.  
only halfway into  
the CD tray.  
removed.  
Inserting the disc in upside down  
Insert the compact disc with the label facing  
upward  
The device does  
not work correctly  
(EJECT, LOAD,  
PLAY)  
The surface of CD is extremely dirty Clean the CD or try another CD, if this works  
20  
or it is damaged.  
correctly, the first CD is properly damaged.  
Temperature inside the car is too  
high.  
Cool off until the ambient temperature returns  
to normal  
The volume control is set too low.  
Turn up the volume properly.  
There is no sound.  
Check the power and ground connection  
according to the wiring diagram.  
The device has not been correctly  
connected.  
19  
17  
The operation keys 1.The built-in microcomputer is not  
1. Switch the device off and on again. Or press  
the RESET button to resume the program.  
do not work  
operating properly due to noise  
2.Front panel is not properly fix into  
its place  
1 & 2.SEL(MENU) BUTTON AND VOL KNOB  
2. Reinstall the front panel  
a) Press the SEL button briefly, it is activated as selecting each mode of E. VOL.  
-> VOLUME ->BASS ->TREBLE -> BALANCE -> FADER ->  
When selecting a desired audio mode, rotate the VOL knob to adjust the  
audio effect.  
In each mode, the waiting time is about 5 seconds, and the time waiting time  
is over, it returns to the last display mode of tuner or CDP mode.  
The control mode of E.VOL is operated with following numeric display.  
- VOL: (MIN)00, 01,......46, 47(MAX).  
The installation angle is more than  
30 degrees  
Adjust the installation angle to less than 30  
degrees  
The surface of the road is uneven.  
Wait until the road becomes smoother before  
playing the CD.  
The sound of the  
CD player skips  
The surface of CD is extremely dirty Clean the CD or try another CD, if this works  
or it is damaged. correctly, the first CD is properly damaged.  
- BASS/TRE: -07, -06,...,00,...+06,+07  
- BAL: 0LR9, 1LR9, ..., 9LR9,..., 9LR1, 9LR0  
No radio reception. The antenna cable is not connected. Insert the antenna cable firmly into the  
antenna socket of the device.  
- FAD: 0FR9,1FR9, ..., 9FR9,..., 9FR1, 9FR0  
b) When pressed and hold for more than 2 seconds, it is activated as cyclical  
mode of following functions for users selection.  
->BEEP (ON/OFF) -> USER SET(FLAT/CLASSIC/ROCK/POP)  
->VOL(LAST/DEFA) ->CLK(ON/OFF)->CLK(12/24)mode.  
When selecting a desired audio mode, rotate the VOL knob to adjust the  
audio effect.  
In automatic search The transmission signals are too  
mode the radio does weak.  
not stop at a trans-  
Tune in to a radio station manually.  
mitting station.  
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BEEP ON/BEEP OFF  
CARE FOR USING CD'S:  
BEEP ON mode: The beep is generated when any key is pressed.  
BEEP OFF mode: The beep sound is disabled.  
VOL LAST/VOL DEFA  
About CD-R/CD-R/W discs:  
In addition to commercially-recorded audio CD's, this unit can play CD-R and  
CD-R/W discs. In some cases, particularly when recorded on older CD burners,  
some CD-R and CD-R/W discs may not play. Also, whenever you are recording  
a CD for playback in this receiver, it is recommended that you record at 24x or  
slower speed for CD-R and 4x or slower for CD-R/W to achieve higher signal  
quality and better playback performance.  
VOL LAST: The radio switches on at the actual volume it had when it was last  
switched off.  
VOL DEFA: After pressing SEL button, AVOL will be displayed. Then you can  
pre-select a constant switch-on volume by using the VOL knob.  
CLK ON/OFF  
CLK ON: Clock will always show on the display when power off.  
CLK OFF: Clock will disappear on the display when power off.  
1. To keep the disc clean:  
Do not attach any sticker or adhesive tape on the disc.  
Handle the disc by its edge to keep the disc clean and do not touch the surface.  
Before playing a disc, wipe it off with a clean, dust-free cleaning cloth.  
Wipe the disc outwards from the disc center.  
3. POWER ON/OFF & MUTE  
When the unit is power off, the unit comes to on by pressing any button except  
the EJECT and the RELEASE button.  
When the unit is power on, press and hold the power button for more than 0.5  
seconds, the unit goes into power off mode.  
2. When one has already been inserted. Doing so may damage the unit. Insert a disc  
with labeled surface up, or it will damage the unit.  
When the unit is power on, press the power to switch the MUTE state on/off.  
4. LCD Display  
5. CD SLOT  
3. Do not expose the disc to direct sunlight or nearby heat sources such as heating  
vents, caliduct which can cause the disc to warp.  
Do not leave disc in a car if it is parked in direct sunlight as that will lead to a  
considerable rise in the temperature inside the car.  
6&7. TUNE, SEEK, TRACK, SKIP UP / DOWN BUTTONS  
a) During RADIO mode:  
4. Do not use any secondhand or rented disc, usually, there is glue on the surface of  
those discs, it will stop the unit working and damage it.  
Press the >>| or |<< button briefly to manual tune up/down for the desired  
radio station frequency step by step.  
Press and hold the >>| or |<< button for longer 0.5 seconds, to automatically  
tune up/down for the radio station frequency of strong signal.  
b) During disc, USB playback mode:  
5. Always store the disc in its case for protection. Scratched up discs will produce poor  
sound performance and cause CD player to skip.  
Press the >>| button briefly to play next track.  
Press the |<< button briefly to play the current track from the beginning of it  
if the playing time is more than 2 seconds.  
Press the |<< button briefly to play the previous track if the playing time is  
less than 2 seconds.  
Press the >>| or |<< button and hold to skip forwards or backwards, release  
6. In raining day or wet area, the moisture may form on the disc or the optical parts,  
the playback may not be possible. If moisture forms on the disc, wipe it off with a  
soft cloth.  
If moisture forms on the optical parts of the unit, allow the unit to sit for about one  
hour with power on.  
to resume normal playback.  
7. Do not use solvents such as benzine or thinners. Commercially available cleaners  
or anti-static spray will damage the unit.  
8. PRESET STATION MEMORY AND TOP/>||, INT, RPT, RDM BUTTONS  
a) During radio mode:  
Go to any preset station by pressing one of the 6 preset station buttons (1-6).  
If one of these buttons is pressed for more than 2 seconds, the station currently  
being listened to will be memorized into the selected preset button.  
b) During disc, USB mode:  
1) Press the TOP/ >|| button briefly to interrupt the playback of the disc or USB.  
Press again to resume normal playback of the disc or USB.  
Press the TOP/>|| button and hold for approximately 0.5 seconds to play the  
first track of the disc or USB.  
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2) Press the INT button to sample the first 10 seconds part of each track, and the  
INT ON will be visible on the LCD display.  
In the process of INT, pressINT button again to stop sampling and to continue  
playing the current track, and the LCD will display INT OFF.  
3) Press the RPT button once to play the current track repeatedly, and the RPT  
ONE will be visible on the LCD display.  
During MP3/WMA disc or USB mode, press the RPT button twice  
continuously to play the current folder repeatedly, and the RPT ABM will be  
visible on the LCD display.  
INSTALLATION METHOD  
This is an anti-theft installation method.  
The main unit wears a METAL MOUNTING SLEEVE.  
Please connect the wiring, eg, the Power supply, the Speakers and the Antenna  
according to the requirements of this Instruction Manual, then install the metal mounting  
sleeve into the car as per the diagram illustrated below.  
In the process of RPT, press RPT button again to stop playing repeatedly  
mode and the LCD will display RPT OFF.  
4) Press the RDM button to play all tracks on disc in random order, and the  
To properly fix the metal mounting  
sleeve, bend the tabs of the sleeve  
against the DASH BOARD with a  
screwdriver.  
To raise the anti-skip capability of the unit,  
please ensure the metal support strap is  
connected firmly to the car chassis.  
METAL  
SUPPORT STRAP  
RDM ON will be visible on the LCD display.  
In the process of RDM, press RDM button again to stop playing in random  
order and the LCD will display RDM OFF.  
5) Press the -10 and +10button to move up and down10 tracks at a time.  
When the remained total tracks is lack of 10, the both buttons are inactively.  
UNIT CHASSIS  
9. BAND AND LOC BUTTON  
In radio mode,press the BND button briefly to select the radio broadcasting  
band you would like to hear. The AM/FM band is toggled cyclically through the  
tuning bands:  
PLASTIC TRIM RING  
DASHBOARD  
METAL MOUNTING SLEEVE  
FRONT PANEL  
->FM 1-> FM 2 -> FM 3 -> AM1->AM 2 ->.  
Press and hold the BND button to select LOCAL/DX mode.  
Note: This button is only for FM reception. In AM mode, LOC is void.  
To remove the CD player out of the mounting sleeve,  
insert the two supplied keys into the left and right side  
slots of the chassis at the same time.  
10. MODE BUTTON  
Press the MODE button to change among tuner (radio), disc (when a disc is  
loaded), USB (when an USB stick is inserted) and AUX mode.  
NOTE  
11. EJECT KEY  
Remove the two screws that protect  
In the power on state, the loaded disc can be ejected by pressing the EJ key.  
the CD player during transportation  
before operating the player.  
Before installing and operating  
the CD player, remove the metal  
mounting sleeve illustrated by  
the arrows.  
To attach the removable faceplate, insert the  
right side of the faceplate into the right of the  
CD player chassis first. Then push the left side  
of the faceplate into the chassis until you hear  
it click.  
12. LOUDNESS BUTTON  
When press briefly, the LOUD mode is turned on, its to enhance the bass sound  
effect when the volume level is low. Press again to cancel the loudness effect.  
13. AS/PS BUTTON (Auto-storage /Preset scan)  
During radio mode:  
1) when press and hold for more than 1 second, the radio searches from the  
current frequency and checks the signal strength level until 6 station are  
found. And then the 6 stations frequency are preset to the corresponding  
preset memory numbered bank. The auto-storage operation is implemented  
in the each selected band. When the auto-storage operation is finished, the  
radio execute the Preset Scan.  
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MAINTENANCE OF REMOTE CONTROL  
2) when press briefly, the radio searches for each preset station in the current  
band and holds at that preset number for 5 seconds with releasing mute, and  
then search again.  
An insulation tag was installed in your remote by the manufacturer to prevent the  
battery from draining. Removing the tag from the remote before using.  
During MP3/WMA file in disc or USB mode:  
1) In TRACK SEARCH mode, the LCD will display TRK T 000 and flash the  
biggest digit 0 that the USBstick contain. (if the number of tracks is less than  
100 and more than 9, it will be TRK 00) Then rotate the VOL knob to select the  
number of the flashing digit from 0 ~ 9. Then press SEL button to confirm the  
number and flash next smaller digit 0.  
With the same means, select the number of the flashing digit. After finishing  
selecting the number of all flashing digit, press SEL button to play the track of  
the selected serial number.  
BATTERY INFORMATION:  
Lithium Battery: CR2025 3V  
Battery Life: Approximately 6 months.  
Replacing the Battery from the Remote Controller:  
1) Remove the battery holder by pressing the locking tab with your thumb  
and pulling it out.  
2) Replace the battery with the same type and the + side facing up.  
3) Gently push in the holder until securely locked into place.  
2) In FIRST CHARACTER SEARCH mode, the LCD will display A--......, If there  
are files names its first character are A , the ......is the first file name its first  
character is A by the order of A~Z and 0~9; otherwise, the ......is NONE. Then  
rotate the VOL knob to select files first character by the order of A~Z and 0~9.  
Finally press SEL button to play the selected file.  
3) In DIRECTORY SEARCH mode, the LCD will display the root folder(if there is  
not the root folder, it will find a root folder named ROOT). Then rotate the VOL  
knob to select your desired folder and then press >> | or |<< button to select  
your desired track in the folder.  
Finally press SEL button to play the selected track.  
14. ST/MO BUTTON  
In FM mode, press the ST briefly to select stereo or mono sound mode.  
15.CLK BUTTON  
WARNING:  
Press the CLK button briefly to display time for 5 seconds on the display, and  
then returns to its previous display unless the button is pressed again.  
Then press the CLK button and hold for more than 1 second until the real time  
flashes on the display. Then you can adjust HOUR or MINUTE by rotate the  
VOL knob.  
Do not recharge, disassemble or dispose of in fire.  
Battery leakage may cause damage to the unit.  
To avoid the risk of accident, keep batteries out of reach of children.  
16.AUX INPUT JACK  
Press the mode button to select auxiliary input playing mode. Then you can  
connect any matched external audio device to this socket. Use the volume  
knob to adjust volume.  
17.USB SOCKET  
In order to play the file in the USB stick, turn over the plastic cover cap then  
insert the USB stick into the USB socket. The system will change into the  
USB mode automatically, and then play the first file in the USB.  
When no needing to do USB operation, please cover the plastic cover cap.  
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18. RELEASE BUTTON  
OPERATION OF REMOTE CONTROL  
1. Power On/Off.  
Press the REL button to release the front control panel from the unit chassis,  
then pull it up a little to remove from the unit chassis.  
When the front control panel is removed the LED indicator flashes.  
1
2
2. Mute Button  
19. RESET BUTTON  
4
Before operating the unit for the first time, or after replacing the car battery or  
changing the connections. You must reset the unit.  
Press this button with a cuspidal object. This operation will erase the clock  
setting and some stored contents.  
3. SEL/MENU Button  
3
7
6
4. Audio Level & Menu UP(+) Button  
5. Audio Level & Menu Down(-) Button  
5
20.IR REMOTE SENSOR  
6.Tune/Seek Up And Track Skip Up/FF Button  
8
9
7.Tune/Seek Down And Track Skip Down/REW Button  
8. Mode Button  
9.Band Button  
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