Sony ICF-CD73W Service Manual ▷ View 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)
ICF-CD73W
ICF-CD73W
18
18
: CD PLAY
: TUNER (FM/AM)
76
RESET
32
R ON
31
POWER ON
SYSTEM CONTROLLER
IC401 (2/2)
B+ SWITCH
Q302, 303
DRY BATTERY
SIZE “C”
(IEC DESIGNATION R14)
4PCS. 6V
+3.3V
REGULATOR
IC403
RESET SIGNAL
GENERATOR
IC402
DC IN 6V
J901
–
+
PVCC
UCOM B+
POWER
AMP B+
AMP B+
VT B+
41
AC IN
AUDIO
CIRCUIT
B+
R-CH
LINE AMP
Q153
D101
R-CH
R-CH
R-CH
MUTING
Q101
LINE AMP
Q152
TU LCH
CD LCH
A
B
C
R DATA
R CLK
R CE
COUNT
R CLK
R CE
COUNT
66
65
64
64
63
MUTE
62
SEG0 – SEG17
LIQUID CRYSTAL DISPLAY
LCD401
10 – 27
COM0 – COM3
6 – 9
PLL DATA
PLL CLK
PLL CE
COUNT
MUTE
PLL CLK
PLL CE
COUNT
MUTE
A M
U
TE
78 79
+
+
POWER AMP
IC303
7
1
BUZZER
52
PLL DATA, PLL CLK,
PLL CE, COUNT, MUTE
PLL CE, COUNT, MUTE
WAKE UP
SWITCH
Q401
KEY 2
S607 – 611
44
KEY 1
S601 – 606
45
KEY0
S501 – 503
46
KEY CHK
51
70
71
X401
32.768kHz
74
75
X402
4.19MHz
XT1
XT2
X1
X2
D308
D401
DC MIDDLE VOLTAGE
CONTROL SWITCH
Q405
AGC
Q154
AGC CONTROL
SWITCH
Q301
D309
FILTER AMP
Q151
RV601
VOLUME
MUTING
CONTROL SWITCH
Q403
LIN
LOUT
+
R-CH
SP101
(L-CH)
(L-CH)
SP201
(R-CH)
+6V
REGULATOR
Q301, 306, 307
42
VM
80
BATT CHK M
49
DC CHK
LOAD
43
VH
DC/DC
CONVERTER
Q304, 305, T301
+3.3V
REGULATOR
IC301
D402
LOAD CONTROL
SWITCH
Q406
77
B MUTE
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
6-3. BLOCK DIAGRAM - MAIN Section -
(Page 16)
(Page 17)
(Page 17)
ICF-CD73W
ICF-CD73W
19
19
LCD board
SW board
TUNER board
POWER board
KEY board
RELAY board
JACK board
CD board
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• f :
internal
component.
•
C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
•
A : B+ Line.
•
H : adjustment for repair.
• Power voltage is dc 6 V and fed with regulated dc power
supply from pin
1 and 3 of CNP901 on the JACK board,
and power voltage is dc 3 V and fed with regulated dc
power supply from pin
power supply from pin
2 and 3 of CNP901 on the JACK
board.
no mark : FM
( ) : AM
[ ] : WEATHER (1 – 7 ch)
‹‹ ›› : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
( ) : AM
[ ] : WEATHER (1 – 7 ch)
‹‹ ›› : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
FM
L : WEATHER (1 – 7 ch)
f :
AM
J
: CD PLAY
For Printed Wiring Boards.
Note:
•
•
X : Parts extracted from the component side.
•
Y : parts extracted from the conductor side.
•
W : indicates side identifi ed with part number.
• z :
Through
hole.
• f :
internal
component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Note: The components identifi ed by mark
0 or dotted
line with mark
0 are critical for safety.
Replace only with part number specifi ed.
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Circuit Boards Location
ICF-CD73W
ICF-CD73W
20
20
R722
L701
R727
R725
R726
R728
R729
R730
C739
R731
C741
C746
R744
C744
R701
R704
R705
R703
R710
R714
R715
R713
R712
C71
1
C715
R746
JC703
R716
C717
R747
C718
C719
C728
JC701
R771
C774
R769
R773
R772
R707
R702
C742
R735
R734
R736
R738
R737
R739
C737
C735
C733
C732
C734
R720
R718
R721
C725
C724
JC702
R732
C729
R724
R723
FB701
C736
C738
R742
C743
R733
R741
R740
C706
C704
C705
R743
R719
R717
E
C
B
Q701
C750
C780
C701
C702
C703
R706
C709
C712
C714
C710
C716
R745
C766
C779
C754
R759
R762
R757
R760
R754
R751
C755
C756
C758
C757
R756
R753
C781
R770
C768
C773
C763
C764
C761
C762
R709
IC701
E
C
B
Q702
L702
Q705
E
C
B
Q704
E
C
B
Q703
IC702
C760
JW725
13
12
1
2
CNP702
JW720
JW724
JW719
JW723
JW722
JW721
C749
+
1
3
20
19
2
1
CNP701
JW715
JW714
JW712
JW713
C747
+
+
C745
+
C740
X701
JW718
JW717
JW716
C721
+
JW71
1
JW710
JW707
JW709
+
C708
C753
+
C713
+
JW708
C767
+
JW706
JW702
JW701
+
C759
L750
JW703
JW705
JW704
D701
21
40
20
1
(11)
11
1-687-325-
CD BOARD
E
POWER BOARD
CNP303
D
LCD BOARD
CNP402
60
61
21
20
1
80
40
41
16
15
2
1
CNP705
JW791
JW792
JW793
20
19
2
1
CNP704
JW795
JW796
JW797
JW794
1
6
C777
C778
CNP706
OPTICAL
PICK-UP
BLOCK
(KSM-900AAA)
M702
(SPINDLE)
M
M
M701
(SLED)
S701
(LIMIT)
ON: When the optical pick-up
os inner position
(11)
11
1-687-324-
RELAY BOARD
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
TP
(VC)
TP
(RF)
TP
(TE)
6-4. PRINTED WIRING BOARDS - CD Board -
•
: Uses unleaded solder.
• See Page 19 for Circuit Boards Location.
(Page 24)
(Page 26)
Ref. No. Location
• Semiconductor
Location
D701
B-5
IC701
E-3
IC702
B-4
Q701
G-4
Q702
D-2
Q703
B-3
Q704
B-2
Q705
B-1
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