Sony HCD-EC70 Service Manual page 44

HCD-EC70
PANEL BOARD IC701 MB90802-108 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 P24
2 P25
3 P26
4 P27
5 P30/SO3
6 P31/SC3
7 P32/SI3
8 P33/TMCK
9 P34/IC0
10 P35/IC1
11 P36/OCU0
12 P37/OCU1
13 X0A/P90
14 X1A/P91
15 VCC
16 VSS
17 P40/LED0
18 P41/LED1
19 P42/LED2
20 P43/LED3
21 P44/LED4
22 P45/LED5/TOT0
23 P46/LED6/TOT1
24 P47/LED7/TOT2
25 P50/TIN0
26 P51/TIN1
27 P52/TIN2/PPG0
28 P53/PPG1
29 P54/SI0
30 P55/SC0
31 P56/SO0
32 AVCC
33 P57/SI1
34 P76
35 AVSS
36 P60/AN0
37 P61/AN1
38 P62/AN2
39 P63/AN3
40 P64/AN4
41 P65/AN5/INT0
42 P66/AN6/INT1
43 P67/AN7/INT2
44 VSS
45 P70/AN8/INT3
46 P71/AN9/SC1
47 P72/AN10/SO1
48 P73/AN11/SI2
44
I/O
O Power relay control signal output
O Amp control signal output
O System reset signal output to the RF AMP
O Control signal output to the PB/REC EQ AMP
O Serial data output to the MP3 decoder
O Serial data transfer clock signal output to the MP3 decoder
I Serial data input
O Latch pulse signal output to the RF AMP
I Remote sensor signal input
O Serial data latch pulse output to the MP3 decoder
O M-MUTE signal output to the MP3 decoder
O Data transfer request signal output to the MP3 decoder
O Resonator output terminal (32.768kHz)
I Resonator input terminal (32.768kHz)
— Power supply terminal (+3.3V)
— Ground terminal
O STANDBY LED control signal output
I CD switch (SW3) input terminal
I CD switch (SW1) input terminal
I CD switch (SW2) input terminal
O Loading motor control signal output
O Loading motor control signal output
O Elevator up/down motor control signal output
O Elevator up/down motor control signal output
I CD chuck switch (SW7) input terminal
I CD close switch (SW6) input terminal
I CD stock switch (SW5) input terminal
I CD open switch (SW8) input terminal
I Internal status (SENSE) input from the CD DSP
O Serial data transfer clock signal output to the CD DSP
O Serial data output to the CD DSP
— Power supply terminal (+3.3V)
I Data input from the the tuner
O Oscillator control signal output to the CD DSP
— Ground terminal
I Power detection signal input
I Key AD input1
I Key AD input2
I Tuner tuned status signal input
I Bias signal input from the bias oscillation circuit
I Key AD input3
I Power down detection signal input
I Subcode data request signal input terminal
— Ground terminal
— Not used (open)
O Back light LED control signal output
I SUFFIX signal input (Connected to +3.3V)
I Signal input from the volume encoder
Description