Boss Audio Systems 634U User manual

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634U
MP3-Compatible AM/FM CD Receiver
USER’S MANUAL CONTENTS
Installation
DIN front-mount installation
DIN rear-mount installation
Removing the head unit
Detaching the front panel
Replacing the front panel
General controls
Radio controls
Audio controls
CD/MP3 Playback controls
How to select MP3 files
Controls behind faceplate
USB and SD/MMC operations
Remote control functions
Wiring diagram
Troubleshooting
Specifications
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Before removing the bezel, press the OPEN
button to remove the front panel.
Press OPEN Button to flip down front panel the front panel move left pull to remove
the front panel
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Press OPEN Button to flip down front panel
the front panel move left
pull to remove
the front panel
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Press the OPEN button, let the Front
Panel arrive in horizontal position and
detach the panel by pulling it towards
you as illustrated.
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Front panel controls
POWER Press any button to turn unit ON. To turn
head unit off, press and hold POWER.
GENERAL CONTROLS
OPEN Press to flip down the front panel.
DSP Selects radio frequency or clock display.
To set the clock:
1. With clock display selected, hold down (DSP) button until
clock display starts flashing.
2. Rotating VOL left to change minutes, VOL right to change
hours.
3. Press (DSP) button to start clock
BEEP MODE When press the SEL button for more than 2 seconds,
it is activated as selecting mode of these function.
BEEP ON: BEEP sound can hear from speaker when the buttons are
pressed.
CD MULTI ON/OFF
SEL
2 sec.
MULTI
ESP 12s. / 45s.
SEL
2 sec.
ESP SEL
ESP SEL
ESP
SEL BEEP
SEL
2 sec.
MULTI BEEP ON/OFF
VOL
VOL
VOL
ESP SEL
SEL SEEK
SEL SEL
2 sec.
MULTI BEEP SEEK1 / SEEK 2
VOL
The Liquid Crystal Display will display the current state of the unit.
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STATION PRESETS Six numbered preset button store and recall sta-
tions for each band.
Storing a station:
1. Select a band (if needed)
2. Select a station
3. Hold a preset button longer than one second. Preset station num-
ber appears in the display when station is saved.
Recall a station:
1. Select band (if needed)
2. Press a preset button for less than one second to select stored sta-
tion.
RADIO CONTROLS
TUNE BUTTONS When pressed for less than 1 second, these keys operate
as manual tuning mode.
When pressed longer than 1 sec., they are operated as SEEK tuning mode.
If the keys are not pressed for 3 seconds, they will return to SEEK mode
again.
AS/PS Select six strong stations and store them in current band.
1. Select a band (if needed)
2. Hold AS/PS button for more than three seconds. The new stations
replace stations already stored in that band.
Preset Scan
Scan stations stored in current band
1. Select a band (if needed)
2. Touch AS/PS for more than one second but less than three seconds.
Radio pauses for five seconds at each station. Touch AS/PS again to
stop scanning when desired station is reached.
SCAN This key is operated as RADIO SCAN. The operation is similar as
normal search but different thing is holding 5 seconds on every station
detected in RADIO SCAN mode.
BAND Push this switch to select the desired band. Selection is made in
regular sequence as FM-AM.
SEEK MODE When press this button for more than 2 seconds, it is activated
as selecting mode of these function.
SEEK 1: When SEEK 1 mode is activated, AUTO SEEK SCAN is stopped when
station is detected even user still push SEEK button.
SEEK 2: Auto SEEK SCAN is not stopped even station is detected if user
push SEEK button. When release this SEEK button, then stop when station
is detected.
CD MULTI ON/OFF
SEL
2 sec.
MULTI
ESP 12s. / 45s.
SEL
2 sec.
ESP SEL
ESP SEL
ESP
SEL BEEP
SEL
2 sec.
MULTI BEEP ON/OFF
VOL
VOL
VOL
ESP SEL
SEL SEEK
SEL SEL
2 sec.
MULTI BEEP SEEK1 / SEEK 2
VOL
LOC Press to select between strong (LOC) and weak (DIST) stations.
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Front panel controls
AUDIO BUTTON and ROTARY CONTROL Press the button repeatedly to
access Volume, Bass, Treble, Balance and Fader functions. Then use the
knob to adjust the selected function.
AUDIO CONTROLS
EQ Press repeatedly to cycle through five modes: POP M, ROCK M,
CLASS, FLAT M or DSP OFF.
SUB Press and hold to engage subwoofer output.
LOUD Press this button to increase the level of bass output.
SOURCE By pressing this key, user can select AUX/TUNER/CD-
MP3/USB or MMC/SD mode.
MUTE Press to silence the receiver. Press again to
return to normal operation.
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