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Pioneer SX-303 Service Manual page 3

Am/fm stereo receiver
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2.FRONT
PANEL
FACILITIES
)
a
AM
sa
ec
@) POWER SWITCH
Push this to switch on and off the unit's power. Power is
supplied at the depressed (=)
switch position (ON) and
turned off at the released (IL) position (OFF).
(2) HEADPHONE
JACK
Connect the plug on the stereo headphones to this jack
when listening to sound through headphones.
(3) TONE CONTROLS
BASS
: The bass is increased when this control is rotated
clockwise from the center position and reduced
when rotated counterclockwise.
TREBLE
:The
treble
is increased
when
this control
Is
rotated clockwise from the center position and
reduced when rotated counterclockwise.
(4) BALANCE
CONTROL
This is normally kept at its center position. It is rotated
when the volume of sound delivered through the left and
right channels of the speakers or headphones differs.
The right channel volume is reduced when the control is
rotated toward the LEFT from the center position while
the left channel
volume
is reduced
when
it is rotated
toward the RIGHT.
(S) FUNCTION
SWITCHES
PHONO
: Press when listening to records.
FM
: Press when listening to FM broadcasts.
AM
: Press when listening to AM broadcasts.
(6) TAPE
(ADPT)
SWITCH
This is depressed when using a tape deck or adaptor unit
connected to the rear panel TAPE/ADAPTOR jacks.
@
LOUDNESS
SWITCH
Depress this switch to the ON position when Sistening to
sound at a low level of volume. This will enhance the bass
and treble and give more life to the sound even at a low
volume.
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VOLUME
CONTROL
Use
this to adjust the volume
of the sound
delivered
through the speakers or headphones.
The volume
is increased
when
this control is rotated
clockwise from the minimum "0" position.
@Q) TUNING
INDICATOR
(TUNING)
This lights up to indicate that an FM, AM station has been
tuned in.
STEREO
INDICATOR
(STEREO)
This lights up automatically
when
an FM
station broad-
casting in stereo has been tuned in.
d) SPEAKERS
SWITCHES
These are used to select the speakers through which you
will listen to the sound.
The selected speakers are now working.
A:
The sound
is heard from the speakers connected to
the speaker A terminals on the rear panel.
B:
The sound
is heard from
the speakers connected to
the speaker B terminals on the rear panel.
No sound will be heard when SPEAKERS A and B switches
are both released. This is the position at which the sound
can be heard through the headphones.
NOTE:
No sound will be heard through the speakers when both the A
and B switches are depressed if only one set of speakers has been
connected to either the A or B SPEAKERS terminals.
(2
FREQUENCY SCALE
This indicates the frequency of the broadcasting station
(FM, AM).
The top level figures (88 ~ 108) indicate the FM band.
The bottom level figures (55 ~ 160) indicate the AM band.
(3)
TUNING
KNOB
Rotate this knob to pick up stations (FM, AM).
POWER
INDICATOR

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