Boss Audio Systems Car Stereo System 637UA User Manual

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LOCATION AND FUNCTION OF CONTROLS  
TROUBLE SHOOTING  
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.  
Common Symptoms  
Cause  
Solution  
If the power supply is properly connected to  
the car accessory, switch the ignition key to  
" ON " or " ACC " .  
The car ignition is switched off.  
There is no power.  
Replace another fuse according to the wiring  
diagram.  
The fuse has blown.  
The CDs cannot  
be loaded.  
Presence of CD disc inside the player Remove the disc in the player then put a new  
upward  
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  
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.  
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 ANDVOL 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 timeis about 5seconds, and thetime 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 onat the actualvolume it hadwhen it waslast  
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: Clockwill always showon the displaywhen power off.  
CLK OFF: Clockwill disappear onthe display whenpower 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 unitis power on, press and holdthe power buttonfor more than0.5  
seconds, the unit goes into power off mode.  
When the unitis power on, press the powerto switch theMUTE state on/off.  
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.  
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 brieflyto play nexttrack.  
Press the |<< button briefly to play the current track from the beginning of it  
if the playing time ismore than 2seconds.  
Press the |<< button briefly to playthe previous trackif the playing time is  
less than 2seconds.  
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.  
Press the >>| or |<< button andhold to skipforwards or backwards, release  
to resume normalplayback.  
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 pressingone of the6 preset station buttons (1-6).  
If one ofthese buttons ispressed for morethan 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 interruptthe playback ofthe disc orUSB.  
Press again toresume normal playbackof 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 currenttrack, and theLCD will displayINT OFF.  
3) Press the RPT button once toplay the currenttrack repeatedly, and theRPT  
ONE will be visible on the LCD display.  
During MP3/WMAdisc or USBmode, press theRPT button twice  
continuously to play the current folder repeatedly, and the RPT ABM will be  
visible on the LCD display.  
In the process of RPT, press RPT button again to stop playing repeatedly  
mode and theLCD will displayRPT OFF.  
4) Press the RDM button to play all tracks on disc in random order, and the  
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 theLCD will displayRDM 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.  
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:  
->FM 1-> FM 2 -> FM 3 -> MW1->MW 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.  
10. MODE BUTTON  
Press the MODE button tochange among tuner(radio), disc (whena disc is  
loaded), USB (when an USB stick is inserted) and AUX mode.  
11. EJECTKEY  
In the power on state, the loaded disc can be ejected by pressing the EJ key.  
12. LOUDNESS BUTTON  
When press briefly, the LOUD mode is turned on, its to enhance the bass sound  
effect when the volume levelis low. Press again tocancel the loudnesseffect.  
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 andchecks the signalstrength level until6 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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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.  
18. RELEASE BUTTON  
Press the RELbutton to releasethe front controlpanel from theunit chassis,  
then pull itup a littleto remove fromthe unit chassis.  
When the front control panelis removed theLED indicator flashes.  
During MP3/WMAfile 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.  
19. RESET BUTTON  
Before operating the unit for the first time, or after replacing the car battery or  
changing the connections. You must reset theunit.  
Press this button with acuspidal object. This operation willerase the clock  
setting and somestored contents.  
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.  
2) In FIRST CHARACTER SEARCH mode, theLCD will displayA--......, If there  
are files namesits first character areA , the ......is the first file name itsfirst  
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 SEARCHmode, the LCDwill display theroot folder(if there is  
not the rootfolder, itwill find aroot folder namedROOT). Then rotate the VOL  
knob to selectyour desired folderand then press>> | or |<< button to select  
your desired track in the folder.  
Finally press SELbutton to playthe selected track.  
14. ST/MO BUTTON  
In FM mode, press the ST briefly to select stereo or mono sound mode.  
15.CLK BUTTON  
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 buttonand hold formore than 1second until thereal time  
flashes on the display. Then you can adjust HOUR or MINUTE by rotate the  
VOL knob.  
16.AUX INPUT JACK  
Press the mode button to select auxiliary input playing mode. Then you can  
connect any matchedexternal audio deviceto 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 thenplay the firstfile in theUSB.  
When no needing to do USB operation, please cover the plastic cover cap.  
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