Read Sony CMT-EH20DAB / HCD-EH20DAB Service Manual online
30
HCD-EH20DAB
PANEL BOARD IC701 MB90803PF-G-114E1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
P24
O
Main power on/off control signal output terminal "H": on
2
P25
O
Standby control signal output to the power amplifier and system reset signal output to the CD DSP
3
P26
-
Not used
4
P27
O
Serial data output to the electrical volume
5
SO3
O
MP3 serial data output to the CD DSP
6
SC3
O
MP3 serial data transfer clock signal output to the CD DSP
7
SI3
I
MP3 serial data input terminal
8
TMCK
O
CD serial data latch pulse signa output to the CD DSP
9
IC0
I
Remote control signal input from the remote control receiver
10
IC1
O
MP3 serial data latch pulse signal output to the CD DSP
11
OCU0
O
System reset signal output to the motor/coil driver
12
OCU1
O
MP3 data request signal output to the CD DSP
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
LED0
O
LED drive signal output terminal for STANDBY indicater
18 to 24
LED1 to LED7
O
Not used
25 to 27
TIN0 to TIN2
O
Not used
28
PPG1
I
CD lid open/close detection switch input terminal "L": CD lid close
29
SI0
I
Internal status (SENSE) signal input from the CD DSP
30
SC0
O
CD serial data transfer clock signal output to the CD DSP
31
SO0
O
CD serial data output to the CD DSP
32
AVCC
-
Power supply terminal (+3.1V)
33
SI1
I
Serial data input from the DAB tuner module
34
P76
O
Oscillator control signal output to the CD DSP
35
AVSS
-
Ground terminal
36
AN0
I
Power monitor input terminal
37, 38
AN1, AN2
I
Front panel key input terminal (A/D input)
39
AN3
I
Model destination setting terminal
40
AN4
I
REC switch signal input terminal
41
AN5
I
Front panel key input terminal (A/D input)
42
AN6
-
Not used
43
AN7
I
Subcode sync (S0+S1) detection signal input from the CD DSP
44
VSS
-
Ground terminal
45
INT3
-
Not used
46
SC1
-
Not used
47
SO1
I
Serial data output to the DAB tuner module
48
SI2
I
Dial pulse input of the rotary encoder (for VOLUME control)
49
SC2
I
MP3 data request signal input from the CD DSP
50
SO2
I
MP3 acknowledge signal input from the CD DSP
51 to 53
MD2 to MD0
-
Not used
54
RSTX
I
Reset signal input from the reset switch "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
V0
O
Power supply on/off control signal output for the DAB tuner module
56
V1
O
LED drive signal output terminal for liquid crystal display back light
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