Sony ICF-DVD57TV Service Manual page 64

ICF-DVD57TV
MAIN BOARD IC401 µPD789478GC-SR7596A (MAIN SYSTEM CONTROLLER)
Pin No. Pin Name
1, 2 NC
3 to 5 VLC2 to VLC0
6 to 9 COM0 to COM3
10 to 25 SEG0 to SEG15
26 to 28 NC
µ-COM R DATA
29
30
OPEN/CLOSE LED
31
AUX LED
32 TV LED
µ-COM S DATA
33
µ-COM CLOCK
34
35
TUNER LED
36 XRESET
µ-COM LATCH
37
38
AVDD
39
DVD OPEN
ENCODE+,
40, 41
ENCODE-
42 DVD CLOSE
43 to 46
KEY3 to KEY0
47
AVSS
48
RC
49
AC IN
50
DVDXIFBUSY
51
LOADING A
52
BUZZER
53
DVD SI0
54
DVD SO0
55
DVD SCK
56
DVD XIFCS
57
DVD AMUT IN
58
DVD RST
59
DVD LED
60 LOADING B
61
TRAY DET
62 MONITOR ON
63
RADIO MUTE
64 RADIO CE
65
RADIO DATA
66
RADIO CLK
67 VOL CLK
68 VOL DAT
69
IC0
70
XT1
71
XT2
64
I/O
- Not used
- Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
O
Common drive signal output to the liquid crystal display
O
Segment drive signal output to the liquid crystal display
- Not used
I Serial data input from the sub system controller
O LED drive signal output of the OPEN/CLOSE indicator "H": LED on
O LED drive signal output of the AUX indicator "H": LED on
O LED drive signal output of the TV indicator "H": LED on
O
Serial data output to the sub system controller
O
Serial data transfer clock signal output to the sub system controller
O LED drive signal output of the RADIO ON/BAND indicator "H": LED on
O System reset signal output to the sub system controller
O
Latch signal output to the sub system controller
- Power supply terminal (+3.3V) (for A/D converter)
I Disc tray open detect switch input terminal "H": disc tray is opend
I
Jog dial pulse input from the rotary encoder
I Disc tray close detect switch input terminal "L": disc tray is closed
I Front panel key input terminal (A/D input)
- Ground terminal (for A/D converter)
I SIRCS signal input from the remote control receiver
I Power failure detection signal input terminal
O Busy signal output to the servo DSP
O Disc tray open/close motor drive signal (close direction) output terminal
I Beep sound drive signal output terminal
I Serial data input from the servo DSP
O Serial data output to the servo DSP
I Serial data transfer clock signal input from the servo DSP
I Chip select signal input from the servo DSP
I Audio muting on/off control signal input from the servo DSP
O Reset signal output to the servo DSP
O LED drive signal output of the DVD indicator "H": LED on
O Disc tray open/close motor drive signal (open direction) output terminal
O Disc tray open/close detection signal output to the servo DSP "L": disc tray is closed
O
Power on/off control signal output for the monitor section "H": power on
O Radio muting on/off control signal output to the FM/AM PLL "L": muting on
O PLL chip enable signal output to the FM/AM PLL
O PLL serial data output to the FM/AM PLL
O PLL serial data transfer clock signal output to the FM/AM PLL
O
Serial data transfer clock signal output to the electrical volume
O Serial data output to the electrical volume
- Not used
I Sub system clock input terminal (32.768 kHz)
O Sub system clock output terminal (32.768 kHz)
Description