Block Diagram - Tuner Section - Sony HCD-GRX7 Service Manual

7-1. BLOCK DIAGRAM – TUNER Section (AEP, UK, German models only) –
ST +10V
TM1
ANTENNA
+B
FM 75
1 ANT IN
COAXIAL
5
AM
10 17
05
Q5
B+ SWITCH
FM CIRCUIT B+
6
CF1 CF2
10.7MHz 10.7MHz
FM IF AMP
IF OUT
7
FE1
Q1, 2
FM FRONT-END
FE2
MW/LW FRONT-END
6 12
5 13
14
3 15
16
2
17
26 25 24 23 22 21 20
Q14
Q13
LW SWITCH
MW
SWITCH
Q12 Q11
MW MW
SWITCH
SWITCH
9
FM/AM PLL
IC21
– 21 –
CF3
10.7MHz
FM IF AMP
1 FM-IN
FM DET-OUT
Q3, 4
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
28 REG IC41
Q9
LW SWITCH
AM
AM IF AM
AM-MIX 2 4
DET
IFT41 IF
OUT
29 AM-OSC
AM-SD
12
ADJ
RV41
AM TUNED
STEREO
LEVEL
27 AM-RF IN TUNED
AM SD 9 FM DET
10
X42 X41
450kHz 10.7MHz
30 14 15 13
D41
RV42
FM TUNED
LEVEL
X21
4.5MHz
11 14 7 2 12 8 1 24
CE
DI
CL
DO
HCD-GRX7/GRX7J/R700/RX77/RX77S
MPX LPF41 AMP AMP
23 22 OUT L 21 17
19
IN L
IN L.P.F. OUT L
OUT R 20 R-CH
RDS DECODER
IC1752
RDS DATA
DATA 2
7
5
4 MUX
RDS INT
INT 16
RDS SIGNAL BUFFER
OSCI OSCO
IC1751
13 14
X1751
4.332MHz
24
STEREO
7
TUNED
6
MUTE
ST-CE
3
ST-DOUT
4
ST-CLK
STEREO, TUNED, MUTE,
5
ST-DIN ST-CE, ST-DOUT, ST-CLK, ST-DIN
6
– 22 –
• SIGNAL PATH
: FM
: AM (MW/LW)
ST-L
I
(Page 29)
K
(Page 29)
J
(Page 29)