KRC-478R/RV/RY/RYV
4
CIRCUIT DESCRIPTION
(X14-) IC1 :
-COM
PORT
No.
PORT NAME
I/O
FUNCTION
OPERATING CONDITION
1
AV CONT
O
Analogue reference voltage control.
Active "H".
2
IC2 TYPE O
I
Stereo signal data switch.
-
3
IC2 TYPE 1
I
Stereo signal data switch.
-
4
AVSS
-
Analogue GND.
-
5
MOTOR
O
Cassette mechanism power supply control.
"H" : Mechanism motor +B "ON".
"L" : Mechanism motor +B "OFF".
6
M-STBY
I
Stand-by signal input from the cassette mechanism.
"H" when the stand-by signal exists.
"L" when the other signal exists.
7
AV REF 1
-
5V power supply for D/A converter reference voltage.
-
8
ILLUMI
O
Illumination power supply control.
"H" : Illumi. "ON" or the ALL OFF mode.
"L" : Illumi. "OFF".
9
L-RESET
O
Reset signal output to LCD driver (X13-).
"L" : Reset.
10
PANEL
I
Panel detection signal input.
"H" : Panel OFF. "L" : Panel ON.
11
L-DATA L
I
Data input from LCD driver.
-
12
L-DATA S
O
Data output from LCD driver.
-
13
L-CLK
O
Data clock output from LCD driver.
-
14,15
N.C.
-
-
-
16
CH-DATA C
I
Data input from the changer.
-
17
CH-DATA H
O
Data output to the changer.
-
18
CH-CLK
I/O Changer communication clock input and output.
-
19
L-CE
O
LCD driver data control.
Active "H".
20
SUB+
O
Sub motor control signal output.
-
21
SUB-
O
Sub motor control signal output.
-
22
MS-CONT
O
No audio signal detection level switch to equalizer amplifier.
"H" : PLAY. "L" : FF/REW.
23
EQ-MUTE
O
Mute control signal output to equalizer amplifier.
"H" : FF/REW or the other source.
"L" : TAPE PLAY.
24
PLL-SCL
O
Communication clock signal output to the front-end.
-
25
AM+B
O
Front-end's AM power supply control output.
"H" : AM+B "ON".
26
FM+B
O
Front-end's FM power supply control output.
"H" : FM+B "ON".
27
N.C.
-
-
-
28
DSI
O
DSI's LED on/off switch.
"H" : LED "ON".
29
MUSIC
I
No audio signal detection level input to equalizer amplifier.
"H" when audio signal does not exist.
"L" when audio signal exists.
30
FWD/REV
I
Tape FWD/REW signal input.
"H" : Forward. "L" : Reverse.
31
R-DATA
I
Data input from RDS decoder.
-
32
R-QUAL
I
Qual input from RDS decoder.
-
33
VSS1
-
GND.
-
34
SD
I
SD signal input from the front-end.
"H" when the carrier signal exists.
"L" when the carrier signal does not exist.
35
IC2-SCL
O
Clock output to E-volume (IC2).
-
36
N.C.
-
-
-
37
PLL-SDA
I/O Data input and output to the front-end.
-
38
IC2-SDA
I/O Data input and output to E-volume (IC2).
-
39
MUTE
O
Preout and mute signal output to E-volume (IC2).
"H" : Mute "ON". "L" : Mute "OFF".
40
N.C.
-
-
-
