Boss Audio Systems 637UA User Manual
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BEEP ON/BEEP OFF
BEEP ON mode: The beep is generated when any key is pressed.
BEEP OFF mode: The beep sound is disabled.
VOL LAST/VOL DEFA
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.
BEEP ON mode: The beep is generated when any key is pressed.
BEEP OFF mode: The beep sound is disabled.
VOL LAST/VOL DEFA
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.
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.
When the unit is power on, press the power to switch the MUTE state on/off.
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.
When the unit is power on, press the power to switch the MUTE state on/off.
4. LCD Display
5. CD SLOT
6&7. TUNE, SEEK, TRACK, SKIP UP / DOWN BUTTONS
a) During RADIO mode:
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:
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
to resume normal playback.
a) During RADIO mode:
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:
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
to resume normal playback.
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.
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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CARE FOR USING CD'S:
1. To keep the disc clean:
Before playing a disc, wipe it off with a clean, dust-free cleaning cloth.
Wipe the disc outwards from the disc center.
Wipe the disc outwards from the disc center.
2. When one has already been inserted. Doing so may damage the unit
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.
. Insert a disc
with labeled surface up, or it will damage the unit.
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.
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.
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.
those discs, it will stop the unit working and damage it.
5. Always store the disc in its case for protection. Scratched up discs will produce poor
sound performance and cause CD player to skip.
sound performance and cause CD player to skip.
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.
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.
7. Do not use solvents such as benzine or thinners. Commercially available cleaners
or anti-static spray will damage the unit.
or anti-static spray will damage the unit.
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.
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.