Read Sony ICF-C773 / ICF-C773L Service Manual online
ICF-C773/C773L
13
13
ICF-C773/C773L
4-3. SCHEMATIC DIAGRAM – MAIN BOARD (US/CND, IT) (2/2) –
• See page 21 for IC Block Diagram.
• See page 20 for Waveforms. • See page 22 for IC Pin Function Description.
C115
C117
R128
R129
R109
R110
R112
R113
R114
R115
R116
R136
R137
R138
R139
R117
R111
R121
R119
R120
C104
C101
C144
C145
X101
C120
C122
C123
C124
C125
C126
C127
C108
C109
C110
C111
C112
C113
C114
R132
C135
C140
C137
C138
C139
R131
R130
R104
C106
C105
IC101
uPD17072GB
IC102
C119
L101
220uH
C136
C118
R102
R103
CN104
R127
CN102
R140
0.01
0.01
100k
100k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
10k
1k
10k
10k
4.7k
0.1
0.1
0.1
0.1
75kHz
47p
10p
5p
0.1
0.1
0.01
0.1
0.1
0.1
1
470p
470p
470p
470p
4.7k
0.01
0.01
1000p
1000p
1000p
100k
10
4.7k
0.01
1000p
-574-1A7-A
SM1125-AWV-E2
1000p
47
35V
0.01
47k
47k
10P
100k
23P
22k
BUS
VDD
GND
L CONT
BAND1
CE
LIGHT3
LED+B
LED+B
EQ
VCOL
VCOL
VCOH
NF
MUTE
SYSTEM
CONTROL
COM3
CE
INT
BEEP
COM0
MELODY
OSC
SI
SC
ST
TEST
NTO
VDD
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
16
17
18
18
19
20
20
21
22
22
23
24
24
25
26
26
27
28
28
29 30 31 32 33 34 35 36 37 38 39 40 41 42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
COM1
COM2
LCD
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
LCD8
LCD9
LCD10
LCD11
LCD12
LCD13
LCD14
NC
LIGHT1
LIGHT2
LIGHT3
MUTE
KS0
KS1
KS2
KS3
KR0
KR1
KR2
KR3
BAND1
BAND2
INIT1
INIT1
INIT2
GND
GND
EO
VCOL
VCOL
VCOH
REG0
REG0
VDD
XOUT
XOUT
XIN
REG1
REG1
REGLCD0
CAPLCD0
CAPLCD0
CAPLCD1
REGLCD1
MERODY ST
MERODY CLK
MERODY DATA
POWER
LIGHT1
GND
LIGHT2
COM0
COM1
COM2
COM3
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
LCD8
LCD9
LCD10
LCD11
LCD12
LCD13
LCD0
GND
LED +B
L CONT
KR3
KR2
KR1
KR0
KS3
KS2
KS1
KS0
GND
DECODER
DATA
1
5
10
15
20
23
BOARD
BOARD
BOARD
MAIN
(1/2)
KEY(MAIN)
LCD
IT
US,CND
(Page17)
(Page17)
(Page12)
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