Sony CF-CD73 - Block Diagram - TUNER Section (ICF-CD73 V)

ICF-CD73/CD73V
1919
6-3. BLOCK DIAGRAM – TUNER Section (ICF-CD73V) –
24
4 7
20 21
FM
OSC
FM IF
AMP
IF
BUFFER
AF
BUFFER
AF
AMP
MPX
MUTE
STEREO/
MONO,
FM/AM
AM IF
AMP
FM
DET
AM
DET
6
FM
RF IN
22
AM
RF AMP
AM
MIX
AM
RF IN
MIX OUT
OSC
OUT
CF2
FM/AM PLL
IC2
CF4
FM
RF OUT
10
QUAD
FM
IF IN
12
15
11
L-OUT
MPX
IN
R-OUT
13
AM
IF IN
LPF1/BAND
AM OSC FM OSC
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
T1
AM IFT
LOW-PASS
FILTER
X1
75kHz
XOUT
XIN
AMIN
IF IN
ST-IND
LP-OUT
LP-IN
FMIN
20
19
1112186
LEVEL
DET
ST
IND
14
LPF2/MO-ST
AM
OSC
BUFFER
BUFFER
SWALLOW
COUNTER
UNIVERSAL
COUNTER
CCB
INTERFACE
REFERENCE
DIVIDER
UNLOCK
DETECT
12 BIT
PROGRAMMABLE
DIVIDER
PHASE
DETECTOR/
CHARGE PUMP
SHIFT REGISTER & LATCH
1/2
FM/AM
DI
CL
CE
DO
DET
OUT
PD
IF OUT ST IND
2
3
1
4
10 9
TV-H
5 13817 16
17 18
16
T1
AM IF
PLL DATA
PLL CLK
PLL CE
COUNT
R-CH
(Page 20)
C
MUTE
TU LCH
(Page 20)
B
T2
FM IFT
T2
FM IF
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
• SIGNAL PATH
: FM/TV (2
– 6CH)
: AM
• R-ch is omitted due to same as L-ch.
: TV (7
– 13CH)/WEATHER
TV-H/WB
MO/ST
7
FM/TV-L
D1
ANT1
FM/TV/WEATHER
LEAD WIRE ANTENNA
B.P.F.
BPF1
D13
D15
L1
TV/WEATHER
RF
CT2
D14
L2
FM/TV
RF
RADIO 6V
D2
D17
L3
TV/WEATHER
OSC
CT4
D24
L4
FM/TV
OSC
CT3
RADIO B+
RADIO B+
TV (7-13CH)/
WEATHER
ON SWITCH
Q11
RADIO B+
FM/TV (2-6CH)
ON SWITCH
Q12
RADIO B+
SWITCHING
Q13
D21
OSC
BUFFER
Q14
2
FM
RF AMP
FM
MIX
CT2, L1
L2
FM/TV(2 – 6CH)
TRACKING
TV(7 – 13CH)/WEATHER
TRACKING
CT5, L5
AM TRACKING
CT5
D3
(1/2)
L5
AM FERRITE-ROD
ANTENNA
L6
AM VCO VOLTAGE
L6
AM OSC
D3
(2/2)
CT4, L3
CT3, L4
FM/TV(2 – 6CH)
VCO VOLTAGE
TV(7 – 13CH)/WEATHER
VCO VOLTAGE
19
VT B+
LOW-PASS
FILTER