Technics ST-8044 - Integrated Circuit Block Diagrams

ST-8044/K
ST-8044/K
5
6
7
8
9
10
11
m
SCHEMATIC
DIAGRAM
*
This
schematic
diagram
may
be
modified
at
any
time
with
the
development
of
new
technology.
302,308
MAIEO
1
i
os
|
Notes:
S1-1 ~$1-4 : Selector switch in ‘‘FM” position.
$2-1,
$2-2
:
FM
muting/mode
switch
in
“‘on/auto”’
position.
$3 : Active servo lock switch in “’on’’ position.
$4_: Power source switch in “on” position.
S5 : Voltage adjuster switch in ‘'240V” position.
Indicated
voltage
are
the
standard
values
for
the
unit
neasured
by
the
DC
electronic
circuit
tester
(high-impedance)
with
the
chassis
TUNING
&
taken
as
standard.
Therefore,
there
may
exist
some
errors
in
the
voltage
values,
depending
on
the
internal
impedance
of
the
DC
Cevets ie circuit tester.
Figures in.______ stand for DC voltage in FM (60dB signal reception) mode.
Figures in | + stand for DC voltage in AM mode.
Figures in<<_ > stand for DC voltage in FM stereo signal reception mode.
Figures in'( i} stand for OC voltage in servo lock circuit operation.
Figures in > , stand for DC voltage in FM (no signal) muting to on mode.
indicates
that
only
parts
specified
by
the
manufacturer
be
used
for
safety.
Signal lines <> FM ==> AM AF
. To represent transistors, Q is used instead of TR, (Ex. TR1>Q1)
cial
N jo
Pu
~ {6.3V 40maA)
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m™ BLOCK DIAGRAM OF IC
e
This
is
the
basic
block
diagram
of
the
inside
circuit
of
IC.
In
an
actual
circuit,
there
may
be
sometimes
idle
terminals
or
-
some
different
functions
other
than
the
basic
circuit.
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IF AMP im IF AMP. iain
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1€101 (AN217)
FM
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AM Converter
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1€102
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1C301
(SVINJM4558D)
FM IF Amplifier & Detector . DC Amplifier