Pioneer SX-3800 Service Manual page 6

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signal level on the air next to a station whose program
you want to receive. you may not be able to tune in
satisfactorilv because the sound will be drowned out
b y t h e s t r o n g e r s i g n a l s . l n c a s e s l i k e t h i s , s e t t h e F M
M U T I N G O F F s w i t c h t o O F F { d e p r e s s e d p o s i t i o n ) a n d
t u n e i n . T h e m u t i n g c i r c u i t d o e s n o t w o r k w h e n t h e
t u n e r i s r e c e i v i n g A M b r o a d c a s t s . l f t u n i n g h a s b e e n
performed after the FM MUTING OFF switch has been
depressed and a station selected, the quartz locked
c i r c u i t i s s e t t o t h e O F F m o d e a n d t h e L O C K E D
i n d i c a t o r d o e s n o t l i g h t .
{ " } F U N C T T O N S E L E C T O R
Depress the function switch which corresponds to the
program source. Turn the volume control down first
before selecting a different function switch while the
sound from one program source is being reproduced.
F M :
A M r
Depress this switch for FM broadcasts.
Depress this switch for AM broadcasts.
A U X : D e p r e s s t h i s s w i t c h w h e n l i s t e n i n g t o a n
audio component connected to the AUX
j a c k s .
PHONO: Depress this switch when playing a record
on the turntable connected to the PHONO
j a c k s .
NATE:
Only one function swirch should be deplessed at a time.
@ volunnE coNTRoL
Use this control to adjust the output level to the
speakers and headphones. Turn it clockwise to increase
t h e o u t p u t l e v e l . N o s o u n d w i l l b e h e a r d i f y o u s e t i t t o
"o."
(} MUTING SWITCH
Set this switch to the *20d8 position to attenuate the
audio output by 20d8. There is no need to adjust the
v o l u m e c o n t r o l i f y o u t h i s s w i t c h w h e n t u r n i n g d o w n
t h e a u d i o o u t p u t t e m p o r a r i l y a n d w h e n c h a n g i n g o v e r
records or tapes.
L O U D N E S S S W I T C H
W h e n l i s t e n i n g t o a p e r f o r m a n c e w i t h t h e v o l u m e
control turned down, depress this switch and the bass
a n d t r e b l e w i l l b e a c c e n t u a t e d .
W h e n t h e v o l u m e i s l o w , t h e h u m a n e a r f i n d s i t h a r d e r t o
h e a r t h e b a s s a n d t r e b l e t h a n w h e n t h e v o l u m e i s h i g h .
The loudness switch is thus designed to compensate for
t h i s d e f i c i e n c y . B y d e p r e s s i n g t h i s s w i t c h , t h e b a s s a n d
treble come through much more strongly and the sound
t a k e s o n a p u n c h e v e n w h e n t h e v o l u m e c o n t r o l i s
turned down,
@ gRl-Rr\cE coNTRoL
Use this control to balance the volume of the left and
right channels. First, however, set the mode switch to
M O N O . l f t h e s o u n d a p p e a r s t o b e l o u d e r o n t h e r i g h t , i t
m e a n s t h a t t h e v o l u m e o f t h e r i g h t c h a n n e l i s h i g h e r .
T u r n t h e b a l a n c e c o n t r o l t o t h e l e f t a n d a d j u s t . C o n -
v e r s e l y . i f t h e s o u n d a p p e a r s t o b e l o u d e r o n t h e l e f t , i t
m e a n s t h a t t h e v o l u m e o f t h e l e f t c h a n n e l i s h i g h e r .
Therefore, turn the balance control to the right and
adjust. After adjusting. return the mode switch to
S T E R E O .
@) TAPE MONTTOR SWTTCHES
Employ for tape playback or to monitor a recording in
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 n e c t e d t o
the TAPE
'l jacks.
2:, Playback or monitoring of a tape deck connected to
t h e T A P E 2 i a c k s .
NOTES:
l. 8e sure to set the switches to the upper IOFF) position
when playing records or listening to broadcasts.
2. When recording with tvvo tape decks simultaneausly. do nat
operate the tape monitor I switch as this will interrupt the
signat to the T,APE 2 deck.
G} MODE SWITCH
Use this switch for selecting mono or stereo perform.
ances.
S T E R E O : S e t t o t h i s p o s i t i o n f o r n o r m a l o p e r a t i o n s .
M O N O :
W h e n s e t t o t h i s p o s i t i o n , t h e l e f t a n d r i g h t
c h a n n e l s i g n a l s w i l l b e m i x e d a n d r e p r o -
d u c e d m o n o p h o n i c a l l y f r o m b o t h s p e a k e r
s y s t e m s .
A D L O W F I L T E R S W I T C H
When this switch is set to 'l SHz, a 6dB/oct attenuation
c a n b e p r o v i d e d { o r f r e q u e n c i e s b e l o w 1 5 H 2 . T h i s
m e a n s t h a t y o u c a n c a n c e l o u t n o i s e i n t h e u l t r a - l o w
frequencies which is generated by low-pitched rumble
f r o m a t u r n t a b l e a n d o t h e r f o r m s o f d i s t o r t i o n .
A l t h o u g h t h i s n o i s e c a n n o t b e h e a r d , i t c a n g e n e r a t e
i n t e r m o d u l a t i o n d i s t o r t i o n a n d d a m a g e t h e s p e a k e r s .
@ B A S S A N D T R E B L E C O N T R O L S
W h e n t u r n e d c l o c k w i s e f r o m t h e O F F p o s i t i o n , t h e
r e s p o n s e i n t h e b a s s a n d t r e b l e r a n g e , r e s p e c t i v e l y , i s
boosted. Turning counterclockwise attenuates the
reSponse.
A t 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 i s b y p a s s e d
and frequency response is flat.
€} HEADPHONE JACK
P l u g t h e h e a d p h o n e s i n t o t h i s j a c k w h e n y o u w a n t t o
listen through your stereo headphones.
Release both speaker switches if you want to listen to
t h e s o u n d t h r o u g h y o u r h e a d p h o n e s o n l y .
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