Read Sony ICF-CD73W Service Manual online
ICF-CD73W
ICF-CD73W
17
17
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
RF IN
22
AM
RF AMP
AM
MIX
AM
RF IN
RF IN
MIX OUT
OSC
OUT
CF2
FM/AM PLL
IC2
CF4
FM
RF OUT
RF OUT
10
QUAD
FM
IF IN
IF IN
12
15
11
L-OUT
MPX
IN
IN
R-OUT
13
AM
IF IN
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
11
12
18
6
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
13
8
17
16
17
18
16
T1
AM IF
PLL DATA
PLL CLK
PLL CE
COUNT
R-CH
C
MUTE
TU LCH
B
T2
FM IFT
T2
FM IF
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
• SIGNAL PATH
: FM
: AM
• R-ch is omitted due to same as L-ch.
: WEATHER
TV
-H/WB
MO/ST
7
FM/TV
-L
D1
ANT1
FM/WEATHER
LEAD WIRE ANTENNA
B.P.F.
BPF1
BPF1
D13
D15
L1
WEATHER
RF
CT2
D14
L2
FM
RF
RADIO 6V
D2
D17
L3
WEATHER
OSC
CT4
D24
L4
FM
OSC
CT3
RADIO B+
RADIO B+
WEATHER
ON SWITCH
Q11
RADIO B+
FM
ON SWITCH
Q12
RADIO B+
SWITCHING
Q13
D21
OSC
BUFFER
Q14
2
FM
RF AMP
FM
MIX
CT2, L1
L2
FM
TRACKING
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
VCO VOLTAGE
WEATHER
VCO VOLTAGE
19
VT B+
LOW-PASS
FILTER
6-2. BLOCK DIAGRAM - TUNER Section -
(Page 18)
(Page 18)
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