Read Sony ICF-CD73 / ICF-CD73V Service Manual online
ICF-CD73/CD73V
29
29
6-13. SCHEMATIC DIAGRAM – MAIN Section –
•
See page 33 for Waveforms.
LCD401
R405
R403
R401
C401
C402
C403
L402
X402
R482
C439
C438
C436
R480
C435
C434
C433
R478
R479
C428
C429
C430
C432
C431
R477
R476
R475
R474
R473
C441
C442
C443
R485
R486
R487
R488
R407
R489
C445
R506
R504
IC402
IC403
C451
C452
C456
C457
C416
C419
C420
C421
C422
C423
C424
C425
C426
R459
R460
R461
R462
R463
R464
R465
R466
R467
R468
R469
R470
R496
C454
R453
R454
R456
R457
R450
R451
C413
C414
C415
R508
R498
C455
R552
R553
R554
R556
S502
S501
C408
R162
C156
R161
Q153
R166
R164
R165
R167
Q152
R160
C160
R156
R159
C155
R267
R265
R262
R264
R266
C256
R261
Q252
Q253
R260
C260
R256
R259
C255
C163
R268
R277
R254
R278
C262
R272
Q254
R274
R174
Q154
C162
R178
R177
C418
C417
R495
R501
R493
R509
R500
R499
R507
R458
R492
R502
C449
C448
R484
C444
C437
C440
R505
C407
R472
L404
R446
C450
C351
C263
C353
R276
C354
R257
C253
D352
R154
C152
R172
R354
C412
D351
D353
D354
R494
R510
C453
Q301
C258
R352
R157
C261
C161
C153
R275
R253
C251
R252
R152
C151
R176
R353
R168
R279
R179
R153
R175
C352
CNP402
Q401
C406
D403
Q403
D401
D402
CNP602
CNP601
R601
R602
R603
R604
R605
R606
R608
R609
R610
R612
S601
S602
S603
S604
S605
S606
S607
S608
S609
S610
S611
R613
R614
R616
R615
R618
R619
R620
R622
C252
R351
R448
R497
CNP401
C446
R409
C458
Q406
R433
R435
R437
TP501
TP502
R491
R444
R443
R442
R441
R440
R439
R438
R436
R434
R432
IC401
R445
RV601
C460
L405
C405
L401
R452
R449
R455
S503
C410
C411
C409
C447
S551
C158
X401
Q405
Q251
Q151
R471
100k
100k
100k
2.2
2.2
2.2
4.19MHz
0
22p
22p
2.2
0
0.1
22p
22p
10k
10k
1000p
47p
100p
220p
220p
1k
1k
1k
1k
1k
0.01
0.01
0.01
1k
1k
1k
1k
22k
470k
0.01
22
22
XC61CN2002MR
XC6201P332PR
2.2
0.1
2.2
2.2
0.01
100p
100p
220p
100p
220p
100p
1000p
0.01
1k
1k
1k
1k
47
100
100
1k
10k
1k
1k
10k
470k
0.01
220k
100k
220k
100k
220k
100k
0.01
0.01
0.01
220k
220k
0.01
22k
47k
22k
10k
0.01
100k
0.47
1k
2SC4081
100k
22k
22k
0
2SC4081
1k
1
10k
1k
0.01
0
22k
100k
22k
100k
0.47
1k
2SC4081
2SC4081
1k
1
10k
1k
0.01
1000p
0
220k
470
100k
0.1
4.7k
2SC4081
1k
1k
2SC4081
0.1
100k
220k
0.01
1000p
100k
220k
220k
220k
220k
220k
220k
10k
470k
22k
0.1
0.1
10k
10
6.3V
100
4V
0.01
220
1000p
220k
1k
0.1
47
4V
4V
1000p
47
4V
4V
220k
47
4V
4V
100k
100p
1SS355
470
0.47
4.7k
100
0.01
1SS355
1SS355
1SS355
220k
220k
0.01
2SC4081
0.47
100
100k
0.047
0.047
100p
4.7k
2.2k
4700p
10k
10k
4700p
220k
1k
0
4.7k
4.7k
2.2k
4.7k
47
4V
4V
13P
2SC4081
0.01
RB411D
DTA124EUA
RB411D
RB411D
3P
6P
220k
470k
220k
100k
100k
47k
22k
47k
22k
10k
220k
100k
47k
100k
22k
47k
22k
10k
0.47
1k
1k
1k
11P
0.1
10k
0.01
DTA114EUA
10k
10k
10k
100k
10k
10k
10k
10k
10k
1k
1k
10k
10k
10k
-A33-8BT
1k
20k
1000p
0.01
100
100
100
100
4V
0.01
2.2
0.047F
5.5V
0.47
32.768KHz
DTS144EUA
2SC4081
2SC4081
10k
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
B1
B2
B3
B4
B1
B
2
B3
B
4
C1
C2
C3
C4
C5
C6
C7
C8
C1
C
2
C
3
C
4
C
5
C
6
C
7
C
8
C9
C
9
S
E
G
0
S
EG
1
S
E
G
2
S
E
G
3
S
E
G
4
S
E
G
5
S
E
G
6
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
S
E
G
1
7
S
E
G
1
6
S
E
G
1
5
S
EG
1
4
S
EG
1
3
S
EG
1
2
S
E
G
1
1
S
E
G
1
0
S
EG
9
S
E
G
8
S
E
G
7
SEG6
SEG5
SEG4
SEG3
SEG2
C
O
M
3
C
O
M
2
C
O
M
1
C
O
M
0
SEG1
SEG0
FSEQ
K
E
Y
0
K
EY
1
K
E
Y
2
A
V
S
S
C
D
O
N
A
C
IN
W
R
Q
B
U
Z
Z
E
R
D
R
F
X
R
S
T
AVDD
CD OPEN
X2
X1
IC
NC
V
L
C
0
V
L
C
1
V
L
C
2
N
C
N
C
VSS0
VDD0
SYSTEM CONTROLLER
XT1
XT2
POWER ON
R ON
NC
NC
NC
NC
NC
NC
N
C
C
D
CE
C
D
C
LK
C
D
D
A
T
A
C
D
C
H
K
K
E
Y
C
H
K
N
C
V
H
V
M
NC
COUNT
R CLK
R DATA
R CE
LOAD
LIQUID CRYSTAL DISPLAY
VT
GND
RCH
R +B
LCH
PLL DATA
COUNT
MUTE
VT
R +B
R ON
AC IN
VM
POWER ON
BUZZER
AMUT
AGC
+B
V
G
RST
FSEQ
DRF
WRQ
CL
CE
DI
RES
RCH
LCH
+3.3V
CD ON
DO
GENERATOR
RESET SIGNAL
R
C
H
P
R
E
G
N
D
L
C
H
CONTROL
SWITCH
Q252,253
LINE AMP
LINE AMP
Q152,153
CONTROL
SWITCH
MUTING
S GND
R CE
R CLK
(ICF-CD73V)
(ICF-CD73)
1
2
2
1
(CD LID OPEN/CLOSE)
+3.3V REGULATOR
CONTROL
SWITCH
LOAD
(CD73:CND,UK,MX)
(CD73:UK)
(CD73:IT)
VERSION0
VERSION1
VERSION2
C
D
D
A
T
A
IN
MUTE
RESET
A MUTE
B MUTE
BATT CHK M
CD
OFF
RADIO
ON
BAND
1
6
1
11
WAKE UP
SWITCH
AGC
AGC
SELECT/
PRESET
PRESET TUNING/PRESET TIMER
5
4
3
2
1
TIMER
EST
ON/OFF
VOLUME
OFF
AUTO
MODE
CLOCK
+
-
TUNE/TIME SET
TIMER SET
G
O
I
AGC
DC
MIDDLE VOLTAGE
CONTROL SWITCH
-1
-2
FILTER AMP
FILTER AMP
(
EXCEPT CD73: IT
)
(
EXCEPT CD73: UK
)
(C
D
7
3
:IT,C
D
7
3
V
)
µCDM-GND
100
µH
µPD789477GC
100
µH
(Page 23)
(Page 25)
(Page 27)
(Page 31)
(Page 31)
Ver. 1.1
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