Read Sony CMT-NEZ31 / HCD-NEZ31 Service Manual online
32
HCD-NEZ31
PANEL BOARD IC801 MB90803PF-G-115E1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SEG32
O
Segment drive signal output to the liquid crystal display
2
STK-ON
O
Standby control signal output to the power amplifier
3
O-CD-XRST
O
System reset signal output to the CD DSP
4
O-FUNCTION
IC-DATA
O
Serial data output to the electrical volume
5
O-MP3-DATA
O
MP3 serial data output to the CD DSP
6
O-MP3-CLK
O
MP3 serial data transfer clock signal output to the CD DSP
7
I-MP3-DATA
I
MP3 serial data input terminal
8
O-CD-XLAT
O
CD serial data latch pulse output to the CD DSP
9
I-RMC (SIRCS)
I
Remote control signal input from the remote control receiver
10
O-XLAT-MP3
O
MP3 serial data latch pulse signal output to the CD DSP
11
O-MP3-SSTB
O
System reset signal output to the motor/coil driver
12
O-REQ-MP3
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 (+3.2V)
16
VSS
-
Ground terminal
17
O-LED-STBY
O
LED drive signal output terminal for STANDBY indicator
18
O-TC-BIAS
O
Recording bias on/off selection signal output terminal "H": bias on, "L": bias off
19
O-TC-REC/PB
O
Recording/playback selection signal output terminal "H": playback mode, "L": recording mode
20
I-TU-SDC
I
Not used
21
I-TC-END SW
I
END switch signal input from the tape mechanism deck
22
O-TC-SOL
O
Trigger plunger on/off control signal output terminal "H": plunger on
23
O-TC-MOTOR
O
Capstan/reel motor on/off control signal output terminal "H": motor on
24
I-TU-SD (TUNED)
I
Tuning detection signal input from the tuner (FM/AM)
25
BACK LIGHT
O
LED drive signal output terminal for liquid crystal display back light
26
-
-
Not used
27
I-TU-RDS-DATA
I
RDS serial data input terminal Not used
28
I-SW_CD-LID
I
CD lid open/close detection switch input terminal "L": CD lid close
29
I-CD-SENS
I
Internal status (SENSE) signal input from the CD DSP
30
O-CD-CLK
O
CD serial data transfer clock signal output to the CD DSP
31
O-CD-DATA
O
CD serial data output to the CD DSP
32
AVCC
-
Power supply terminal (+3.2V)
33
I-TU-DO
I
Serial data input from the tuner (FM/AM)
34
O-CD-XTACN
O
Oscillator control signal output to the CD DSP
35
AVSS
-
Ground terminal
36
I-P-MONI
I
Power monitor input terminal
37
I-KEY_1
I
Front panel key input terminal (A/D input)
38
I-TC-REC/PLAY
I
Recording-proof claw (forward/reverse) detect switch and cassette in detect switch input terminal
39
O-SYS MUTE
O
Line muting on/off control signal output terminal Not used
40
O-AMP MUTE
O
Muting on/off control signal output terminal Not used
41
I-KEY0/WAKE-UP
I
Key interruption processing start signal and front panel key input terminal (A/D input)
42
ACCUT
I
Power down detection signal input terminal "L": power down, normally : "H"
43
I-CD-SCOR
I
Subcode sync (S0+S1) detection signal input from the CD DSP
44
VSS
-
Ground terminal
45
I-TU-RDS-CLK
I
RDS serial data transfer clock signal input terminal Not used
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