Radio Operation; Switching To Radio Mode; Selecting The Frequency Band; Selecting Station - Boss Audio Systems 640CA User Manual

In-dash am/fm cd receiver
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OPERATION
The reset button is to be activated for the
following reasons:
-
Initial installation of the unit when all
wiring is completed.
-
All the function buttons do not operate.
-
Error symbol on the display.
Note: if press reset button (24), the unit
can't work yet, please use a cotton swab
soaked in isopropyl alcohol to clean the
socket on the front panel.

RADIO OPERATION

SWITCHING TO RADIO MODE

Press MOD button (11) shortly to select
radio mode, the radio mode appears in the
display together with the memory band and
frequency.

SELECTING THE FREQUENCY BAND

At radio mode, press BND/LOU/ENT
button (14) shortly to select the desired
band.
The reception band will change in the
following order:
FM1
FM2

SELECTING STATION

Press
button (2) or
shortly to activate automatic seek function.
Press for several seconds until "MANUAL"
appears on the display, the manual tuning
mode is selected. If both buttons have not
been pressed for several seconds, they will
return to seek tuning mode and "AUTO"
appears on the display.
AUTOMATIC MEMORY STORING &

PROGRAM SCANNING

-

Automatic memory storing

Press AS/PS button (10) for several
seconds, the radio searches from the
current frequency and checks the signal
strength until one cycle search is
finished. And then 6 strongest stations
are stored into the corresponding
preset number button.
FM3
AM1
AM2
button (15)
- Program scanning
Press AS/PS button (10) shortly to scan
preset station. When the field strength
level is more than the threshold level of
stop level, the radio is holding at that
preset number for several seconds with
release mute, then searches again.

STATION STORING

Press any one of the preset buttons (7) (1
to 6) to select a station, which had been
stored in the memory. Press this button for
several seconds to store the current station
into the number button.

MONO/STEREO

Press MON button (9) to select mono or
stereo mode. You can sometimes improve
reception of distant stations by selecting
mono operation.

CD/WMA OPERATION

SWITCHING TO CD MODE

If there is no CD/WMA disc inserted in the
driver:
Gently insert the disc with the printed side
uppermost into the CD compartment until
you feel some resistance. The disc is
drawn into the driver automatically. Disc
playback begins.
If a CD/WMA disc is already inserted in the
driver:
Keep pressing MOD button (11) shortly
until the CD mode display appears.

SELECTING TRACKS

Press
button (15) or
move to the previous track or the following
track. Track number shows on display.
Hold
button (15) or
fast reverse or fast forward. Disc play starts
from when you release the button.

PAUSING PLAYING

Press PAU button (5) to pause the player.
Press it again to resume play.
10
button (2) to
button (2) to

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