Read Sony MHC-W555 / STR-W555 Service Manual online
5-2. BLOCK DIAGRAMS
– TUNER SECTION – (AEP, UK model)
– 13 –
STR-W555
– 14 –
TM1
AM
ANTENNA
FM 75
Ω
COAXIAL
ANT IN
ST +10V
Q5
VT
FE1
FM FRONT END
IF OUT
CF1
10.7MHz
IF AMP
Q1, 2
CF2
10.7MHz
IF AMP
Q3, 4
CF3
10.7MHz
1 FM IN
REG
FM/AM MPX
IC41
17
10
09
PLL
IC21
11
FM
TUNED
LEVEL
15 13
30
14
RV42
2 12
14
7
10
X42
450kHz
D41
FM SD
ADJ
OSC.BUFF
AM/FM
VCO STOP
IF BUFF
MUTE
AM
SD
AM
TUNED
LEVEL
12
RV41
2
AM IF
IFT41
4
9
AM IF
DET
STEREO
TUNED
7
6
X41
10.7MHz
MUTE
STEREO
TUNED
23
22
FM DET OUT
MPX IN
21
20
OUT L
OUT R
LPF
RCH
19 AMP IN L
AMP
OUT
L
17
ST L
4
5
5
3
ST-CE
COM-DIN
COM-CLK
COM-DATA
A
MAIN
SECTION
CE
DI
CL
DO
1 24
X21
4.5MHz
AM MIX
AM
SD
6
28
5
2
15
17
16
14
12
13
29
26 25 24 23
22
21 20
9
LW SW
Q9
27
FE2
MW/LW FRONTEND
Q11
MW
SW
MW
SW
Q12
MW
SW
MW
SW
Q14
LW SW
Q13
MW
SW
MW
SW
AM OSC
AM RF IN
FM AFC
• R CH: Same as L ch
• SIGNAL PATH
: FM
: MW
• SIGNAL PATH
: FM
: MW
RDS DATA
RDS INT
(Page 17)
6
FM
VT1
MW
MW
AM OSC
FM
VCO STOP
FM/AM IF
XIN
XOUT
3
4
13
14
2
16
IC1751
RDS DECODER
IC1752
X1751
4.332MHz
5
7
FM
ADJ
26
24
AM
DET
OUT
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