Front Panel Facilities - Pioneer SX-3900 Service Manual

2 . F R O N T P A N E L F A C I L I T I E S
O POWER SWITCH
S e t t h i s s w i t c h t o o N t o s u p p | y p o w e r t o t h e r e c e i v e r .
There will be a short delay when it
is set to ON' because
the muting circuit has been actuated
to suppress the
unpleasant noise that is sometimes
generated when the
Power is switched on and
off '
@ BASS TURNOVER SWITCH
Use this switch to change over the
frequency in which
the sound adlustment with the
bass control is starting
to take effect. Select 200H2
or 400H2 in accordance
w i t h t h e c h a r a c t e r l s t i c s ' o f y o u r I i s t e n i n g r o o m a n d o f
y o u r s p e a k e r s , a n d w i t h y o u r g e n e r a l
p r e f e r e n c e '
@ E A S S A N D T R E B L E C O N T R O L S
Use these controls to adiust the
bass and the treble'
lf you set the tone switch to ON
and turn the bass
c o n t r o I t o t h e r i g h t f r o m i t s c e n t e r p o s i t i o n , y o u w i | | b e
a b | e t o e m p h a s i z e t h e s o u n d i n a f r e q u e n c y r a n g e w h i c h
is lower than that selected by the
bass turnover switch'
C o n v e r s e l y , t u r n i n g t h i s c o n t r o l
f r o m t h e c e n t e r p o s i t i o n
to the left will attenuate the sound'
You can use the treble control to
adjust the sound in a
f r e q u e n c y h i g h e r t h a n t h a t s e l e c t e d
b y t h e t r e b l e t u r n -
over switch.
@ T O N E S W I T C H
Set this switch to ON when adjusting the
bass and treble
c o n t r o l s . W h e n s e t t o t h e O F F p o s i t i o n ' t h e
t o n e c o n t r o l
c i r c u i t s a r e d i s e n g a g e d a n d f r e q u e n c y r e s p o n s e i s f | a t .
T h i s f u n c t i o n i s c o n v e n i e n t f o r c h e c k i n g p h o n o c a r t r i d g e
a n d s p e a k e r t o n e q u a l i t y a n d l i s t e n i n g
r o o m a c o u s t i c s '
O T R E B L E T U R N O V E R
S W I T C H
Use this switch to change over
the frequency in which
the sound adjustment with the
treble control is starting
to take effect' Select 2k{z
or 4kHz in accordance
w i t h t h e c h a r a c t e r i s t i c s o f y o u r I i s t e n i n g r o o m a n d o f
y o u r s p e a k e r s , a n d w i t h y o u r g e n e r a l
p r e f e r e n c e '
@ noRProR swlrcH
S e t t h i s s w i t c h t o o N w h e n r e p r o d u c i n g s o u n d f r o m a n
optional component which is connected
to the ADAP-
T O R i a c k s . A l w a y s s e t i t t o t h e u p p e r
p o s i t i o n i f y o u a r e
n o t u s i n g a c o m p o n e n t w i t h t h e s e t e r m i n a l s '
@ T A P E D U P L I C A T E S W I T C H
Set this switch to ON when
you want to duplicate or
edit a pre-recorded tape using
two tape decks'
@ T A P E M O N I T O R S W I T C H
E m p l o y f o r t a p e p l a y b a c k o r t o m o n i t o r
a r e c o r d i n g i n
progress.
1 :
P l a y b a c k o r m o n i t o r i n g o f a t a p e d e c k c o n -
nected to the TAPE 1 jacks'
S O U R C E : B e s u r e t o s e t t o t h i s
p o s i t i o n w h e n n o t
u s i n g t h e t a p e d e c k f o r p l a y b a c k a n d
m o n i -
tori ng '
2 :
P l a y b a c k o r m o n i t o r i n g o f a t a p e d e c k
c o n -
nected to the TAPE 2 jacks'
NOTE:
When listening to records or broadcasts'
be sure to set this
switch to SOURCE' Sound witt not be obtained
from speakers
if it is set to 1 or 2.