Read Sony ICF-C773 / ICF-C773L Service Manual online
ICF-C773/C773L
22
Pin No.
Pin Name
I/O
Description
1
NC
–
Not used (OPEN)
2,3
LIGHT1,2
O
LCD back light on/off signal output
4
LIGHT3
O
Illumination LED on/off signal output
5
MUTE
O
Mute control signal output
6 to 9
KS0 to 3
O
Key source signal output
10 to 13
KR0 to 3
I
Key return signal input
14
BAND1
O
Tuner band (FM/AM) selection signal output
15
BAND2
O
Not used (OPEN) (C773 model)
Tuner band (MW/LW) selection signal output (C773L model)
16,17
INITIAL1,2
I
Destination setting terminal
18
GND
–
Ground
19
EO
O
Tuning data output
20
VCOL
I
Tuner AM(C773 model), MW/LW(C773L model) OSC frequency input
21
VCOH
I
Tuner FM OSC frequency input
22
REG0
–
Capacitor connection terminal
23
VDD
–
Power supply
24
X OUT
O
System clock output (75kHz)
25
X IN
I
System clock input (75kHz)
26
REG1
–
Capacitor connection terminal
27
VLCD0
–
Not used
28,29
CAP0,1
–
Capacitor connection terminal
30
VLCD1
–
Not used
31 to 34
COM0 to 3
O
LCD common drive signal output
35 to 48
LCD0 to 13
O
LCD segment drive signal output
49
LCD14
O
Not used (OPEN)
50
CE
I
Time clock pulse input
51
INT
I
Not used (Pull down)
52
BEEP
O
Beep signal output
53
MELODY ST
O
Melody decoder strobe signal output
54
MELODY CK
I
Melody decoder serial clock output
55
MELODY DATA
I
Melody decoder serial data output
56
POWER
–
Not used (OPEN)
4-11. IC Pin Function Descriptions
• IC101 SYSTEM CONTROL (uPD17072GB-574-1A7-A)
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