Front Panel Facilities - Pioneer SX-750 Service Manual

2. FRONT PANEL FACILITIES
P O W E R I N D I C A T O R L A M
Lights when SPEAKERS switch is moved to any position
from POWER OFF, and AC power is supplied to the
receiver.
S P E A K . E R S S W I T C H
Functions both as power switch and speaker selection
switch.
POWER OFF: AC power is off.
A :
O F F :
B :
A i B :
P H O N E S O U T P U T
Insert headphone plug into this jack when headphone
l i s t e n i n g i s d e s i r e d . I n t h i s c a s e , S P E A K E R S s w i t c h s h o u l d
b e i n O F F p o s i t i o n .
B A S S , T R E B L E C O N T R O L S
For tone adjustment when TONE switch is in ON posi-
tion. When knobs are turned clockwise from "0" position,
response in bass or treble range, respectively, is boosted.
Turning counterclockwise attenuates response.
T O N E S W I T C H
C o n t r o l s O N - O F F o o e r a t i o n o f t o n e c o n t r o l c i r c u i t . l n t h e
ON position, tone control by means of BASS and
T R E B L E k n o b s m a y b e a c c o m p l i s h e d . I n t h e O F F p o s i -
tion, the tone control circuit is bypassed and frequency
response in high and low ranges is flat.
H I G H F I L T E R S W I T C H
For high frequency noise due to scratches on the record,
place switch in 6kHz position. This will provide 6dB/
octave attenuation at frequencies above 6kHz. For normal
operation switch should be in OFF (upper) position.
Sound will be heard from speakers con-
nected to A speaker terminals.
No sound will be heard from speaker sys-
tems. This position should be used when
l i s t e n i n g w i t h h e a d p h o n e s .
Sound will be heard from soeakers con-
nected to B speaker terminals.
Sound will be heard from speakers con-
nected to A terminals and from speakers
connected to B terminals.
S T E R E O I N D I C A T O R L A M P
Lights when FM stereo broadcast is being received.
(\D r'IONCGT. BT
E P E A K E F g
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B A L A N C E C O N T R O L
For adjustment of relative output levels of L and R
channels of speaker systems or headphones. Clockwise
rotation from center position increases volume of R over
L channel. Counterclockwise rotation increases volume of
L channel over R.
V O L U M E C O N T R O L ,
F o r a d j u s t m e n t o f s p e a k e r o r h e a d p h o n e o u t p u t l e v e l .
Level increases with clockwise rotation of knob-
L O U D N E S S S W I T C H
S I G N A L M E T E R
F o r F M a n d A M r e c e p t i o n ,
n e e d l e o f t h e S I G N A L m e t e r
t h e r i g h t .
t u r n T U N I N G k n o b u n t i l
i s d e f l e c t e d a m a x i m u m t o
l e v e l , p l a c i n g t h i s s w i t c h i n
response in low and high
F A L A N C I
F M T U
With th
right, fi
T U N I N
M O D E
For se
playba
S T E R E
channe
speake
NOTE:
Record
MONO
rate.
D U P L I C
With su
two tap
onto th
operati
F o r l i s t e n i n g a t l o w v o l u m e
t h e O N p o s i t i o n w i l l b o o s t
frequency ranges.
The response of the human ear to low and high sound
volumes is different. At low volume levels, the ear is
relatively insensitive to sounds at either extreme of the
frequency scale. By means of the LOUDNESS switch,
these sounds are given additional amplification.
l u u t J
F M
l i l l m i l i l l r i l '
AM
55
, $ ? , 9 4 , 9 6 , 0 g , 1 0 0 , 1 0
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