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HCD-GRX9000/RX900
– 21 –
– 22 –
7-1.
BLOCK DIAGRAM – TUNER Section (East European, CIS models only) –
TM1
ANTENNA
FM 75
Ω
COAXIAL
ANT IN
ST +10V
Q5
B+ SWITCH
VT
FM CIRCUIT B+
FE1
FM FRONT-END
IF OUT
+B
CF1
10.7MHz
FM IF AMP
Q1 – 4
CF3
10.7MHz
FM-IN
REG
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
IC41
05
FM/AM PLL
IC21
FM TUNED
LEVEL
RV42
X42
450kHz
D41
D42
D43
FM SD
AM/FM
VCO-STOP
IF-BUFF MUTE
AM-SD
ADJ
AM
SD
AM TUNED
LEVEL
RV41
RV1702
VCO
TP1702,
RV1702
SUB CARRIER
LEVEL
RV1701
SUB CARRIER
PEAK
CT1701, L1701, TP1701
SWITCHING
Q1702
SWITCHING
Q1703
SWITCHING
Q1701
AM IF
IFT41
AM
IF
AM
DET
OUT
FM DET
STEREO
TUNED
X41
10.7MHz
MUTE
STEREO
STEREO, TUNED, ST-MUTE,
ST-CE, ST-DOUT, ST-CLK, ST-DIN
TUNED
FM DET-OUT
MPX
IN
OUT L
OUT R
LPF41
L.P.F.
AMP
IN L
AMP
OUT L
ST-L
ST-CE
ST-DOUT
ST-CLK
ST-DIN
CE
DI
CL
DO
X21
4.5MHz
AM-MIX
Q9
LW SWITCH
FE2
MW/LW FRONT-END
Q11
MW
SWITCH
Q12
MW
SWITCH
Q14
LW SWITCH
Q13
MW
SWITCH
AM-OSC
AM-RF IN
FM
VT1
MW
MW
AM OSC
FM
VCO STOP
FM/AM IF
IF REQ
XIN
XOUT
POLAR DECODER
IC1701
IN
SUB IN
SUB IN
L OUT
R OUT
MON
TP1702
TP1701
L1701
CT1701
R-CH
VCO
AM
8
4
1
1
6
14
13
15
16
17
29
27
30 14
15 13
4
24
7
6
2
5
3
2
10
17
9
11
14 7
2 12 8
1
24
FM LOW
13
4
3
6
5
26 25 24 23
22
21 20
5
12
23
22
2
20
18
7
6
VCO STOP 9
ST IND 10
21
19
17
20
28
D1704
D1701
D1702
D1703
10
12
9
(Page 27)
A
(Page 27)
B
• SIGNAL PATH
: FM
: AM (MW/LW)
3
13
12
5
3
9 11
4
14
C A
POLAR /PILOT SWITCH
IC1702
17