Main Section - Sony STR-W777 Service Manual

Q Q
5-2. BLOCK DIAGRAM – TUNER SECTION – (AEP, UK model)
3 7 6 3 1 5 1 5 0
ST +10V
Q5
TM1
FM FRONT END
ANTENNA
FM 75Ω
ANT IN
COAXIAL
AM
T E
L 1 3 9 4 2 2 9 6 5 1 3
10 17 9
16
w w w
.
FE1
CF1
CF2
10.7MHz
10.7MHz
IF AMP
IF OUT
Q1, 2
FE2
MW/LW FRONTEND
6 12
5
13
14
3 15
16
2
17
26 25 24 23 22 21 20
Q14
LW SW
Q12
Q13
MW
MW
SW
SW
PLL
IC21
x a o
y
i
— 13 —
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8
CF3
10.7MHz
IF AMP
1 FM IN
Q3, 4
FM/AM MPX
IC41
28 REG
LW SW
Q9
AM IF
2
AM MIX
IFT41
AM
29
AM OSC
12
SD
ADJ
RV41
Q Q
26
FM AFC
3 7 6 3
AM
TUNED
27 AM RF IN
LEVEL
AM
10
SD
X42
Q11 30 14 15 13
450kHz
MW
SW
RV42
FM
TUNED
D41
LEVEL
4.5MHz
11 14 7 2 12 1 24
u 1 6 3
.
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2 4
9 9 8
23 22 MPX IN
FM DET OUT
IC1751
5 7
AM
ST L
4 24
AM IF DET
OUT
RDS INT
X41
RDS DATA
10.7MHz
STEREO 7 STEREO
FM
9
DET
TUNED 6 TUNED
1 5 1 5 0 8 9 2 4
MUTE
X21
CE 3 ST-CE
4
DI COM-DIN
CL 5 COM-CLK
DO COM-DATA
6
m
c o
— 14 —
STR-W777
2
9 9
AMP
OUT L 21 LPF 19 AMP IN L
17
OUT
L
RCH
OUT R 20
RDS DECODER
IC1752
4 2
16
13 14
X1751
4.332MHz
• R CH: Same as L ch
• SIGNAL PATH
: FM
9 8 2 9 9
: MW
A
MAIN
SECTION
(Page 17)