Pioneer SX-1250 Service Manual

F
2.
FRONT PANEL FACILITIES
FUNCTION
SELECTOR
BUTTONS
To
select the
program
source,
push
each button as
follows:
NOTE:
Only one FUNCTION
button should be depresaed
ot o
ttme.
AM
......... For
AM broadcastreception.
PHONO
1
.....
AUX
........
o
o
o
A
\-' o
. . . .
For FlVl
stereo reception.
Automatically
receives
monophonically during
FlVl mono-
phonic
broadcasts. Th0
5TE
REO indic.rror
liihts up when
lhe br"J,lL.r.t r\ n
\lcrcu.
PHONO
2/MtC.
TAPE
DUPLICATE
SWITCH
Set
thi5
switch in the
ON
(down) position
to
duplicate
or edit a recorded
tape using two tape
decks.
To operate
a
turntable
connected
to the
PHONO 1 input
jacks.
For
listening
to
audio
component
(car-
tridge tape
player,
TV sound
tuner, etc.)
connected
to the AUX
input
jacks.
As
above for PHONO 2
iacks,
or for
reproduction
through
microphones con-
nected
to the Mlc
iack
is on the front
panel.
Note, when
the
microphone
is
connected to the
iack
the turntable
connected to the
PHONO2
iacks
cannot
De useo.
FM
VOLIJME CONTROL
AND AUDIO MUTING
SWITCH
The extremely
high
power
output
of the SX-1250
can
be finely controlled by combining the cali-
brated
VOLUME
control and
the AUDIO MUT-
ING switch.
The AUDIO
MUTING
switch
can also be used to
briefly lower
the
volume when changing records or
taDes.
r
VOL!ME
.-.
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ADAPTOR
SWITCH
When
employing
adaptor components,
such as a
graphic
equalizer adaptor,
RG
processor,
or Dolby NR adaptor,
depress this
ADAPTOR
switch to ON.
s?F$
TAPE
MONTTOR
(1,
2)
SWTTCHES
Set
these switch in the ON
(down) position
as follow:
1
.. ..
With a taDe deck connected to
the TAPE
I
jacks
(REC
and PLAY),
either
playback or
monitoring of a recording
in
progre5s
are
pos-
sible.
2
..
..
Same as in 1
above, with a tape deck
connected
to the
TAPE 2
jacks
(REC
and PLAY).
For
normal use, leave
in
the OFF
(up) positions.

Pioneer SX-1250 Specifications

General

Total Harmonic Distortion	0.1%
Tuning Range	FM, MW
Input Sensitivity	2.5mV (MM), 150mV (line)
Speaker Load Impedance	4Ω to 16Ω
Type	Stereo Receiver
Year Introduced	1976
Power Output	160 W per channel into 8Ω (stereo)
Signal to Noise Ratio	90dB (line)
Semiconductors	45 x diodes