Front Panel Facilities - Pioneer SX-1280 Service Manual

3 . F R O N T P A N E L F A C I L I T I E S
POWER SWITCH
F l i p t h i s s w i t c h t o t h e O N p o s i t i o n t o s u p p l y p o w e r t o t h e
stereo receiver. There will be a short delay when it i; 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.
P H O N E S J A C K
Plug the headphones into this jack when you want to
listen through your stereo headphones.
Release the all SPEAKERS buttons if you want to listen
to the sound through your headphones only (This means
that all three buttons will be released).
SPEAKERS BUTT
Press the button corresponding to the speakers connerrted
t o t h e S P E A K E R S t e r m i n a l s ( A , B , C ) o n t h e r e a r p a n e l .
You can presr two of these buttons to listen to sound
from two pairs of speaker systems at the same time.
NOTE:
No ound utill be heard through the speahers if all lhree
buttou are p?esed ot lhe same time.
BALANCE CONTROL
Use thir control to balance the volume of the left and
right chennels. First, however, set the MODE switch to
MONO, and adiust so that the sound appears to c,)me
from somewhere exactly between the two speakers. ll the
sound appears to be louder on the right, it means that the
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 I I C E
control to the left and adiust. Conversely, if the sound
appears to be louder on the left, it means that the
volume of the left channel is higher. Therefore, turn the
BALANCE control to the right and adiust. After adjust-
ing, return the MODE switch to STEREO.
P O W E R M E T E R S
These power meters allow you to read out the rated
power level when speakers with a nominal impedance of
8 ohms are connected to the receiver's speaker terminals.
N O T E :
These ualues are related to the impedance of the
speahers and they wry accprding to the frequency.
In order to find out the exact output leuel, connect an
8-ohm dummy load instead of the speahers.
F U N C T I O N I N D I C A T O R
M E M O R Y M A R K E R S
T h e s e a r e v e r y c o n v e n i e n t f o r f r e q u e n t t u n i n g i n t o t h e
same broadcasting station.
M U T I N G S W I T C H
Set this switch to the -20d8 position to attenuate the
a u d i o o u t p u t i n d i c a t e d b y t h e V O L U M E c o n t r o l b y 2 0 d 8 .
There is no need to adiust the VOLUME control if you
u s e 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
temporarily and when changing over records or tapes.
V O L U M E C O N T R O L
Use this control to adlust the output level to the speakers
and headphones. Turn it clockwise to increase the output
level. No sound will be heard if you set it to -. The scale
is graduated in dB which indicate the attenuation when
t h e m a x i m u m o u t p u t l e v e l i s 0 d B .
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