Boss Audio Systems 638B User manual

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638B
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
How to use bluetooth in your car audio
Wiring diagram
Troubleshooting
Specifications
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Release Button
press RELEASE to release
the front panel...
Before removing the bezel, press the
RELEASE button to remove the front panel.
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Release Button
press RELEASE to release
the front panel...
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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
RELEASE Press to release and remove the front panel.
DISP Selects radio frequency or clock display.
To set the clock:
1. With clock display selected, hold down (DISP) button until
clock display starts flashing.
2. Rotating VOL left to change minutes, VOL right to change
hours.
3. Press (DISP) button to start clock
BEEP MODE When press the SEL button for more than 2 sec-
onds, it is activated as selecting mode of these function.
BEEP ON: BEEP sound can hear from speaker when the but-
tons 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 A/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 A/PS for more than one second but less than three seconds.
Radio pauses for five seconds at each station. Touch A/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
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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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TUNE/TRACK BUTTONS Press and release
to advance to next track or to return to
the beginning of the current track (track
number will be displayed). Press and hold
to fast forward or reverse. Play will begin
at the point when you release the button.
CD/MP3 PLAYBACK CONTROLS
PAUSE Press to pause CD playback. Press
again to resume playback
EJECT Press to eject CD
SHUFFLE Press to play ALL tracks
on the CD in random order.
REPEAT Press and release to con-
tinuously repeat same track. Press
again to stop repeat cycle.
CD SCAN Press to hear first several
seconds of each track on current disc.
Press again to stop intro and listen to
intro last previewed.
CD/MP3 Operation
To PLAY a CD gently insert a CD with the label side up into the disc slot. It will automatically
load and begin playing the first track.
To EJECT a CD press EJECT to stop the CD playback and eject the CD from the slot. The receiver
will automaticvally switch to radio mode.
To PAUSE a CD press PAUSE to stop playback temporarily. Press again to resume playback.
To SKIP TRACKS press the or key to choose the next or preceding track.
To FAST FORWARD or REVERSE press and hold the or key to the desired location
on the disc. Releasing the button starts playback at the location.
To REPEAT a TRACK press REPEAT to continuously repeat the current track. Press again to
return to normal playback mode.
To PREVIEW ALL TRACKS press CD SCAN to play the first several seconds of each track. Press
it again to stop an play the current track being previewed.
To PLAY TRACKS IN RANDOM ORDER press SHUF to play ALL tracks on the CD in random
mode. Press again to cancel this function.
-10 10 TRACK DOWN SELECT:
(In case of MP3 files)
+10 10 TRACK UP SELECT:
(In case of MP3 files)
ESP MODE When press AUDIO button for
more than 2 seconds, it is activated as
12 sec. or 45 sec. of ESP mode can be
selected.
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
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