Read Sony ICF-C717PJ Service Manual online
ICF-C717PJ
18
LCD BOARD IC101
μPD78F0483 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
AUD_MUTE
O
Muting on/off control signal output terminal “H”: muting on
2
AC_IN
I
AC power supply voltage detection signal input terminal “L”: AC power supply in
3
NS_RST
O
Reset signal output to the voice synthesizer
4
PRJ_LED
O
LED drive signal output to the projection section
5
LCD_CS
O
Chip select signal output to the projection section
6
LCD_WR
O
Write/read enable signal output to the projection section
7
LCD_DATA
I/O
Serial data input/output with the projection section
8
BATT_CHK
O
Backup battery enable signal output terminal “L”: Backup battery enable
9, 10
SHIFT1, SHIFT2
O
Oscillation frequency selection on/off control signal output terminal
11 to 13
VLCD2 to VLACD0
I
Input terminal for liquid crystal display drive voltage setting
14
RESET-IN/
I
Reset signal input from the reset signal generator
15
XT2
I
Sub system clock signal input terminal (32.768 kHz)
16
XT1
O
Sub system clock signal output terminal (32.768 kHz)
17
FLMD0
-
Not used
18
X2
I
Main system clock signal input terminal (4.19 MHz)
19
X1
O
Main system clock signal output terminal (4.19 MHz)
20
REGC
-
Not used
21
VSS
-
Ground terminal
22
VDD
-
Power supply terminal (+3V)
23 to 54
SEG31 to SEG0
O
Segment drive signal output to the liquid crystal display
55 to 58
COM3 to COM0
O
Common drive signal output to the liquid crystal display
59
AVREF
I
Reference voltage (+3V) input terminal
60
AVSS
-
Ground terminal
61 to 64
KEY-IN1 to KEY-IN4
I
Panel key input terminal (A/D input)
65
TEMP_IN
I
Temperature detection signal input terminal
66
BATT_VIN
I
Backup battery voltage detection signal input terminal
67, 68
BACKLIGHT1,
BACKLIGHT2
O
LED drive signal output terminal for the liquid crystal display back light
69 to 71
S1 to S3
I
Destination setting terminal
72
BUZZ_OUT
O
Buzzer drive signal output terminal
73
ATX_DAT/ADC_PWR
O
Power supply voltage on/off control signal output terminal for the A/D input
74
ATX_CLK
O
Not used
75
TUN_DATA
I/O
Serial data input/output with the FM/AM radio receiver
76
TUN_CLK
O
Serial data transfer clock signal output to the FM/AM radio receiver
77
TUN_RST
O
Reset signal output to the FM/AM radio receiver
78
I2C_CLK
O
Serial data transfer clock signal output to the voice synthesizer and input selector
79
I2C_DATA
I/O
Serial data input/output with the voice synthesizer and input selector
80
AMP_POWER
O
Standby on/off control signal output to the power amplifi er
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