Microcomputer's Terminal Description - Kenwood KDC-4022 Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

IC1: ELECTORIC UNIT (X25-9800-11/12/21)
Pin No. Name I/O
1 PLL CLK O
2 N.C
3 PANEL DET
4 IC2 SDA I/O
5 IC2 SCL O
6 VDD
7 VSS
8 FLIP-DET
9 BEEP O
10 REMO
11 R QUAL
12 R DATA
13 L CE O
14 VILL DATA O
15 VILL CLK O
16 DSI O
17 DIM CON O
18 TEST
19 ILL CON O
20 VOL A
21 VOL B
22 MOSW O
23 LO/EJ O
24 M STOP O
25 M RST O
26 MUTE O
27 LOE/LIM SW
28 M-MUTE L
29 M-MUTE R
30 PANEL 5V O
31 RESET
32 XT1
33 XT2
34 REGC
35 X2
36 X1
37 VSS
38 VDD
39 NC
40 IC2 TYPE1
41 IC2 TYPE0
42 TYPE2
43 TYPE1
44 TYPE0
45 CD MECHA+B O
46 SW 5V O
47 PS2-0 O
48 PS2-1 O
49 PS1-0 O
50 PS1-1 O
CLK output terminal to Front End
- Open
I Panel assy detect terminal ( Panel assy come off : L)
Control Data input / output terminal for electric volume, CD mechanism
Clock DATA output terminal for electric volume, CD mechanism
- Power supply input terminal (BU 5V)
- GND
I Panel assy open detect terminal (panel close : L )
Beep audio signal output terminal
I Remote control signal input terminal
I RDS decoder QUAL signal input terminal
I RDS decoder Data signal input terminal
CE output for LCD driver IC
Variable illumination DATA out put terminal for D/A converter
Valuable illumination CLK out put terminal for D/A converter
Disc guide illumination control terminal
Dimmer control terminal
- Test terminal
Illumination control terminal
I Volume key input terminal
I Volume key input terminal
CD mechanism motor IC control output terminal (Loading,eject ,brake :L )
CD mechanism loading / eject control terminal
Request signal (Mechanism is STOP) output to CD mechanism (active L)
Reset signal output to CD mechanism (active L)
Muting signal output terminal
I Down SW detection from CD mechanism
I Request for muting signal from CD mechanism (Mute request : L )
I Request for muting signal from CD mechanism (Mute request : L )
Control for Panel5V AVR
I Reset terminal (Active : L )
I Sub clock input terminal (32.768KHz)
I Sub clock input terminal (32.768KHz)
- Regulator output terminal
I Main clock input terminal (20MHz)
I Main clock input terminal (20MHz)
- GND
- Power supply input terminal (BU 5V)
- Open
I Electric volume condition setting terminal
I Electric volume condition setting terminal
I Destination setting terminal
I Destination setting terminal
I Destination setting terminal
AVR control for CD mechanism ( For MP3 AVR ON :L )
Control terminal for SW5V AVR (ON : L , OFF : Hi-Z)
Power supply IC control terminal
Power supply IC control terminal
Power supply IC control terminal
Power supply IC control terminal
KDC-4022/422/6023
Description/Processing Operation
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