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Sony CFD-50 - Page 15

Sony CFD-50
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6-4.
TUNER,
AUDIO
SECTION
SCHEMATIC
DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22 23 24
25
26
e
ic
i
.
Block
Diagram
1C1
CXA1238S
ANT!
B
nega
=
-
_
-
+
-
—_
-
—_
-
__
-—__-
!
(TUNER
BOARD]
|
Paarroweo
;
hy
AY
3
=
2
<5,
to
een
FM
IF/
°
=
2
a
vco
ISCRI.
3
s
a
_
aii
Cc
>
8
SLR-34VR
-
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8
8
FM
STEREO
I
FM/AM
FRONT-END,
o
°
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FM
STEREO
|
ry
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eR
oO
<|
pe
-OEMODE
st
TCU
1/2
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(°02)
TUNING
La
INDIC
ATOR
BAND
PASS
MUTE
FE
QUT
NO
RF
IN
FM
RF
AFC
;
AM
OSCMUTE
FM
®ISCRI
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REG
GNB
ee
1.25V
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D
1
BAND
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DET
U
VGQ
CHECK
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|
|
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AM
IF
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FM
IF
IN
TUNING
GND
AGC:
AFC
St
oN
P
tor
DET
PLL LPF
]
|
Note
on
Schematic
Diagram:
e@
All
capacitors
are
in
uF
unless
otherwise
noted.
pF:
MMF
7
SOWV
or
fess
are
not
indicated
except
for
electrolytics
and
tantalums.
®
All
resistors
are
in
2
and
'/,W
or
less
unless
otherwise
specified.
I
e
fF
:
fusible
resistor.
©
F
I
:
adjustment
for
repair.
Voltage
and
waveforms
are
dc
with
respect
te
ground
FE
under
nosignal
(detuned)
conditions.
Radio
section
no
mark:
FM
Ooo
Tr
Ce
I
OF
[AUDIO
BOARD]
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te
Tape
section.
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ee
(
):
REC
G
s&
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302
FUNCTION
CD
section
eA
MIC
AMP
FM:
a
no
mark:
STOP
Q30!
(
):
PLAY
25C1740S-S
5
pterses
@
Voltages
are
taken
with
a
VOM
(10
MQ/V).
.
4
SWITCHING
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variations
may
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noted
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to
normal
produc-
i
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R222
12k
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CNP30S
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Waveforms
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taken
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|
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R331
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OCH
Voltage
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may
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ta
normal
produc-
tion
tolerances.
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path.
of
GND
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