Service manual

34
HCD-NEZ30
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 signa 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 indicater
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
Ver. 1.2