Read Sony HCD-EC68P / HCD-EC78P / MHC-EC68PI / MHC-EC78PI Service Manual online
HCD-EC68P/EC78P
45
PANEL BOARD IC301 MB90F831PF-G-SPE1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SEG32
O
Segment drive signal output to the liquid crystal display
2
O-AMP-ON
O
Relay drive signal output terminal (for speaker)
3
O-POWER
O
Main power on/off control signal output terminal "H": on
4
O-CD-ON
O
CD power on/off control signal output terminal "H": on
5 to 7
I-3CD-SW3/O-CDM-
CLOSE, I-3CD-SW2/
NC, I-3CD-SW1/
O-CDM-OPEN
I
Detection switch input terminal
8
O-3CD-M1+/
O-CDM-M1+
O-CDM-M1+
O
Motor drive signal output terminal
9
I-RMC
I
Remote control signal input from the remote control receiver
10
O-3CD-M1-/
O-CDM-M1-
O-CDM-M1-
O
Motor drive signal output terminal
11, 12
O-3CD-M2+/NC,
O-3CD-M2-/NC
O
Motor drive signal output terminal
13
X0A
I
Sub system clock input terminal (32.768 kHz)
14
X1A
O
Sub system clock output terminal (32.768 kHz)
15
VCC
-
Power supply terminal (+3.1V)
16
VSS
-
Ground terminal
17 to 20
I/O-CD-BUS0 to
I/O-CD-BUS3
O
Serial data output to the CD-MP3 processor
21
I-3CD-CHACK
I
Disc chucking detection switch input from the CD mechanism deck (EC78P: UK model)
22
I-3CD-STOCK
I
Disc stocking detection switch input from the CD mechanism deck (EC78P: UK model)
23
O-DR-MUTE
O
Muting signal output to the motor/coil driver
24
I-REQ
I
Request signal input from the CD-MP3 processor
25
O-CD-BUCK
O
Serial data transfer clock signal output to the CD-MP3 processor
26
O-CD-CCE
O
Chip enable signal output to the CD-MP3 processor
27
O-CD-RST
O
System reset signal output to the CD-MP3 processor "L": reset
28
O-LED-STBY
O
LED drive signal output terminal for STANDBY indicater
29
I-USB-TXD/I-DMP-TXD
I
Serial data input from the DMPORT connector
30
I-USB-DO/
I-DMP-5V-DET
I
Power voltage detection signal input terminal
31
O-USB-RXD/
O-DMP-RXD
O
Serial data output to the DMPORT connector
32
AVCC
-
Power supply terminal (+3.1V)
33
I-TU-DO
I
Serial data input from the AM/FM DET
34
O-USB-DI/5V-ON/
O-TP-REC-MUTE
O-TP-REC-MUTE
O
Power on/off control signal output terminal
35
AVSS
-
Ground terminal
36
I-P-MONI
I
Power monitor signal input terminal
37, 38
I-KEY1, I-KEY2
I
Front panel key input terminal (A/D input)
39
I-TU-ANSD
I
Power monitor signal input terminal
40
O-USB-SEL1_2/O-SW-
ON/I-TP-STATE
I
Tape syate detection signal input terminal Not used
41
I-KEY-WAKE-UP/VOL
I
System wake up signal input terminal
42
I-HOLD
I
Hold signal input terminal
43
O-CD-SBSY
I
Subcode block sync signal input from the CD-MP3 processor
44
GND
-
Ground terminal
45
I-DMP-DET/
O-USB-RST
O-USB-RST
I
DMPORT connector detection signal input terminal
46
I-MODEL
I
Model setting terminal
47
I-SUFFIX
I
Suffi x setting terminal
48
I-1CD-CLOSE_OPEN/
NC
I
CD table open/close detection signal input terminal (EC78P: UK model)
49
I/O-I2C-DATA
I/O
Two-way serial data bus with the electrical volume
50
I/O-I2C-CLK
O
Serial data transfer clock signal output to the electrical volume
51 to 53
MD2 to MD0
-
Not used
54
I-RST
I
Reset signal input from the voltage detect "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
55
O-TU-CE
O
Chip enable signal output to the FM/AM DET
56
O-TU-CLK
O
Serial data transfer clock signal output to the FM/AM DET
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