Microcomputer's Terminal Description - Kenwood CX-402A Service Manual

Kenwood cd receiver service manual
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MICROCOMPUTER'S TERMINAL DESCRIPTION

(X14-) IC11 : µ-COM
PORT
PORT NAME
No.
1
-
2
CD CLK
3
-
4
EV DATA
5
EV CLK
6
VDD
7
GND
8
P STBY
9
BEEP
10
P MUTE
11
-
12
LCD DI
13
LCD DO
14
LCD CLK
15
LCD CE
16,17
-
18
IC/VDD
19
H-MUTE
20
ACC DET
21
BU DET
22
-
23
BUS DI
24
BUS DO
25
SYS ON
26
P ANT
27
P-ON D
28
P-ON A
29,30
-
31
RESET
32
XT1
33
XT2
34
REGC
35
X2
36
X1
37
GND
38
VDD
39-46
-
47
ILL DET
48
LCD BL
49
DIMMER
50
KEY ILLUMI
51
LED IND
52
EJECT
53
ENC DOWN
54
ENC UP
55
VDD
I/O
FUNCTION
-
-
O
CD clock.
-
-
O
E-volume data.
O
E-volume clock.
-
VDD.
-
GND.
O
Power amplifier stand-by control.
O
Beep.
O
Power amplifier mute control.
-
-
I
LCD driver data.
O
LCD driver data.
O
LCD driver clock.
O
LCD driver chip enable.
-
-
-
Writing voltage.
I
Handle mute.
I
ACC detection.
I
Back-up detection.
-
-
I
IE BUS data.
O
IE BUS data.
O
System control.
O
Power antenna control.
O
Power-on control (Digital).
O
Power-on control (Analogue).
-
-
-
System reset.
-
Sub system clock.
-
Sub system clock.
-
-
Main system clock.
-
Main system clock.
-
GND.
-
VDD.
-
-
I
"SMALL" detection.
O
LCD back light control.
O
Dimmer control.
O
Key illumination control.
O
LED indicator.
I
Disc eject key.
I
Encode down.
I
Encode up.
-
VDD.
CX-402A/402R/402W
OPERATING CONDITION
"L" : Power amplifier does not work.
"H" : Power amplifier works.
"L" : Mute on.
"L" : Mute on.
"L" : ACC on.
"L" : Back-up on.
"H" : ACC on.
"L" : ACC on.
"H" : ACC/POWER/SVR on.
"L" : ACC/POWER off.
"L" : Reset.
"L" : "SMALL" detection.
"H" : ACC/POWER on.
"H" : Dimmer on.
"H" : Key illumination turns on.
The indicator turns on and off every 2
seconds during ACC off.
The indicator turns on during disc in.
"L" : Disc eject.
"H" : Mute off.
"H" : Mute off.
"H" : ACC off.
"H" : Back-up off.
"L" : ACC off.
"H" : ACC off.
"L" : Other.
"L" : Base.
"H" : Other.
3

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Cx-402acrh2Cx-402wCx-402wach2Cx-402wcvh2Cx-402r

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