Pioneer SX-1250 Service Manual page 8

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T U N I N G K N O B
Select the station and tune for optimum reception by
observing the SIGNAL meter for AlVl stations, and both
SICNAL and TUNING meters for FM stations.
FM MUTING BUTTON
Leave this button undepressed (in the ON position) to
suppress unpleasant interstation noise while tuning be-
tween F l\4 stations. Low-strength signals may also be
suppressed by this function, so to pick up a weak station
depress this button to the OFF position.
PROGRAM SOURCE INDICATOR
FM MULTIPATH BUTTON
When selecting the best position for the Fl\4 antenna,
depress this button sothat multipath noise is heard from
the speaker systems. To listen to FN,l broadcasts, release
this button.
T W I N T R E E L E C O N T R O L S
Adjusts high frequency tone.
1okHz: Adjusts frequency band above 2.5kHz. Control
effectiveness at lokHz is r10dB.
20kHz: Provides additional control for the frequency
band above 5kHz. Control effectiveness at
2 0 k H z i s r 5 d B .
six-1 e50
M I C J A C K S ( L a n d R )
For connect each channel jack5 the left and right channel
microphone5.
NOTE:
Use the hEh impedance (oboue 20ks7) with 6mm diatn.
phone plugs.
VOLUME CONTROL
Adjusts output level to speakers and headphones.
Scale is graduated in dB, and when used in conjunction
with the MUTING switch, finer and wider range attenua-
tion can be performed. See additional description on page
6.
A U D I O M U T I N G S W I T C H _ 2 O d B
Depress this switch to attenuate the audio output by
20dB. This convenient feature saves having to disturb the
VOLUME control, for example when answering the tele-
ph on e.
LOU DN ESS SWITCH
Depress this switch when listening at low volume. The
frequency response of the human ear varies according to
the listening volume, and the depressed position com-
pensates for hearing response by emphasizing the bass and
treble.
IIIODE SWITCH
For stereo playback, leave this switch undepressed (or
depress to release, if already depressed). When depressed
for MONO playback, left and right channel stereo signals
will be mixed to produce monophonic sound from both
speaker systems.
BALANCE CONTROL
Adjusts the balance between the sound volume from the
left and right speaker systems or headphones.
right,
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