Block Diagram - Sony ST-S770ES Service Manual

Fm stereo/fm-am tuner
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ST-S770ES
FM
ANT
SECTION 3
BLOCK DIAGRAM
Q202,212
IF BYPASS SWITCHING
{for
Adjustment}
PLL DET
————----+
FRONT
END
(i
MONO
1
per Weer
D278-279
ora
vee
is
joz01
le202
aaas
erat
DBM
PLL DET THD
gayy
TM101
RY151
FM RE AMP
ue
Q102
Len
MONO swiTCH
Irreot
apres
FM IF AMP
Tats
IFT272
D275
PLL
Liot
O101
D102
no
:
'
4
IF
IN
MUTE
af 3! a
= ig
r
ee
{>
:
=
:
@)
2
:
f
3!
METER
MUTE
SENS
:
=a
152
=
,
:
H
eT
L3i
0251,256
o
'
ANTENA
2
=e
ix:
:
MUTING
RF MODE
i
a e
1
AV201
Q204
SELECT
if
t
FM MONO
IF TRAOUGH
SWITCH
e
SELECT SHITOH
4
:
|
8
SWITCH
Ff
o
im
iF THD
[Phe
NULL
cr202
10272
LPF201
care
i
rT
STEREO
1
av252
aves!
LPF
(G ITonty) gugFer
b
STEREO SWITCH
setae
pres
4
FM METER
FM MUTE LEVEL
STEREO
cpr
bS >
7
ANT
RF MODE
t
ae 1
[
fo
LEVEL
g2s2
OPERATION
(From
16801
23pin)(From
10801 24pin)
mine
S'8T
r
iS
MUTING
pee
Avz02
0208
AUDIO
15¥
FM ST
10504
Jere.
L
Toss
\
Ds22
beat
"pros
We
FM
MUTE
{From
iC@01
t2pin)
Q241
| (From 1C801 11pin
551,552
PLL
a7
NARROW
1
PLL
SYNTHESIZER
0501-503
NARROW SWITCH
215,218
0208
LBE
CF203
0521,522
siete
:
VOLTAGE
0459
SWITCH
AM +8
3
MW.ON
2
=
= ir naRnow
g|&
Ble
als
3|
NARROW
THO
bed
NARROW
GAIN
OFromiC601
14,18,17pin
j
f
0231-235
MONO / STEREO
MONOISTEREO
10301
LPF QO!
PENS (LW) out cue videos eds
AM TUNER
NARROWIWIDE
NARROW / WIDE
Cea
:
:
RVAat
Switcd
'
:
AM METER LEVEL
bia!
vsie
ix
T=
aie
He
~
-
C)int
= outs
©) [Ren
AM
:
H
LW:ON
a
'
'
RY302
:
'
Maeve
Bank
0404
SEPARATION
MUTING
See ae
errs
BUFFER
LW:ON
suree
HIGH
AV303
BLEND SW
0407
0405
4g PILOT CANCEL
AV309
nT
MUTING
AM/NARROW
cau
[AM
ete
SWITCH
iW
Tl
re
OE SW
MUTING
(31n2
oute@
©)
|ich
es]
304
9303 ,uto sTEREO
STEREO
SWITCH
a
0308
IF ING
0401-403
swircil
too]
{ 3) MONO/ STEREO
MUTWG
WIDE SWITCH
D308
'
Q4s1 = 0459
CF
a302
a
FM/AM
BUFFER
MW:ON
MFT4Ot
403
AL TONE
AM4B ©
'
CAL TONE
MIX OUT
;
F402
3
[o30
4
138-4
=
oer
NEOTONICEE
10602
'
0303
=
Fa
0455
)
7
FM MUTE
INVERTER
ai
ERTE
s
in
AUTO STOP
LWON
FROM REMOCON
TERMINAL(CN671)
®
a
0253-255
i
°
ay PURE
AUTO STOP
$661
085
SWITCHING
ROTARY
0671
701
PROGRAM SWITCH
ENCODER
FEMOTE.
[pam _[ ev toox |
TCH
Q60a
AUTO
STOP
ANT
RF MODE
TUN
SWITCHING
'
B §
8
&
Es
2
3
os
s
s
8
=
2
$
oS
=
=
>
a
u
°
-~—t
rf
Ed
=
2
=
1C601
=
SYSTEM
CONTROL
wait
&
=
e
MUT
+4
i
=
Ge
a
i,
ws
DG01-904
aie
is
2:
RESET
KEY DIGIT
KEY INPUT
CLK START
Z2ac0%7
zz
ce)
aupio 22012804.0908
OD
oo,
ae
x)
py
POWER TRANSFORMER
1eat4
+5V/4 15V
g
REG
Dgtt-9t4
|
DIGITAL
+13V
SYSTEM,
4 5y
0921,D922
cNsot
10705
get
AC IN
SIGNAL
METER
+304 =
+
$951
DRIVER
E
PONE
———
aoe
0931,D932
e
DISPLAY CONTROL
0931
£
VY
KEY SWITCHES
$701 $702 $703 $704 $705 $706 $707 $708 $709
Pets [sts te Ts Ts To [is]
$726
OF ©
PROGRAM
DISPLAY
CHECK
CAL TONE
S7it
ANT
IF BAND
FM MODE
ANT ATT
MUTING
TUNE MODE
$712 8743 S714 S718 S716 S717 S718
co
co
co
co
CHARACTER
BAND
MEMORY
$722
TUNING/PRESET
$723
DISPLAY MODE
8719 $720
coco
O
S724
-11-
FL701
FLUORESCENT
INDICATOR
TUBE
-17¥~
—-12-

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