Tuner Section (East European, Cis Model) - Sony STR-W777 Service Manual

STR-W777
Q Q
– TUNER SECTION – (East European, CIS model)
3 7 6 3 1 5 1 5 0
ST +10V
Q5
FE1
TM1
FM FRONT END
ANTENNA
FM 75Ω
ANT IN
IF OUT
COAXIAL
AM
6
5
3
2
26 25 24 23
Q14
LW SW
Q13
MW
SW
T E
L 1 3 9 4 2 2 9 6 5 1 3
10 17 9
16
w w w
CF1
CF3
10.7MHz
IF AMP 10.7MHz
Q1-4
FE2
MW/LW FRONTEND
12 28 REG
LW SW
Q9
13
14
15
16
17 29
AM OSC
22 21 20
26
FM AFC
27 AM RF IN
Q11 30 14 15 13
Q12
MW
MW
SW
RV42
SW
FM
TUNED
LEVEL
11 14 7 2 12
PLL
IC21
x a o
. i
— 15 —
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1 FM IN 22 MPX IN
FM DET OUT 23
FM/AM MPX SUB CARRIER
IC41
CT1701 L1701
AM
AM IF
2 AM IF 24
AM MIX 4 DET
IFT41
OUT
X41
AM
RV1701
10.7MHz
SD 12
STEREO 7
SUB CARRIER
FM
ADJ
9
RV41
DET TUNED 6 LEVEL
AM
TUNED
LEVEL
AM
10
SD
X42
450kHz
D41
Q Q
3 7
D42 D43
X21
4.5MHz
8 1 24 13
3
CE
DI 4
CL 5
DO 6
u 1 6 3
y
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2 4
8 9 9
OUT R RCH
20
OUT L
21
POLAR/PILOT
SWITCH
IC1702
PEAK
POLAR
DECODER
12 L IN
IC1701
L OUT
TP1701
POLA
2 7 13
IN L OUT
L IN
3 POUT 6 R CH
R OUT
R OUT 4
C A
9 11
20 SUB IN
18 17
10 9
TP1702
RV1702
VCO
SWITCH
Q1702
6 3 1 5 1 5 0 8 9
D1704
m
c o
.
— 16 —
2
8 9 9
AMP
AMP
LPF 19
IN
17
OUT
L
L
14
• R CH: Same as L ch
• SIGNAL PATH
: FM
R CH
: MW
SWITCH
Q1701
D1701
D1702
SWITCH
Q1703
D1703
ST-L
STEREO
2 4 9 8 2 9 9
TUNED
MUTE
A
MAIN
SECTION
ST-CE
(Page 17)
COM-DIN
COM-CLK
COM-DATA