KD-LX300/KD-LX100
1-31
11
6
20
1
4
10
15
25
13
14
16
12
9
8
5
7
2
22
17
19
18
21
23
24
3
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
IN 1
IN 2
ST BY
Vcc 1/2
Vcc 3/4
OUT 1+
OUT 1-
PWR GND1
OUT 2+
OUT 2-
PWR GND2
R.F
IN 3
IN 4
PRE GND
ON
TIME C
Muting &
ON Time
Control
Circuit
Protectiv
e
circuit
Protectiv
e
circuit
Mute
circuit
Ripple
Filter
Stand b
y
Switch
N.C
TA
B
Mute
OUT 3+
OUT 3-
PWR GND3
OUT 4+
OUT 4-
PWR GND4
LA4743K (IC941) : Power amp
1.Block diagram
2.Terminal layout
3.Pin function
TAB
GND
OUTRR-
STBY
OUTRR+
VCC1/2
OUTRF-
GND
OUTRF+
RIPPLE
INRF
INRR
SGND
INLR
INLF
ONTIME
OUTLF+
GND
OUTLF-
VCC3/4
OUTLR+
MUTE
OUTLR-
GND
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Symbol
Pin No.
Function
Header of IC
Power GND
Outpur(-) for front Rch
Stand by input
Output (+) for front Rch
Power input
Output (-) for rear Rch
Power GND
Output (+) for rear Rch
Ripple filter
Rear Rch input
Front Rch input
Signal GND
Front Lch input
Rear Lch input
Power on time control
Output (+) for rear Lch
Power GND
Output (-) for rear Lch
Power input
Output (+) for front
Muting control input
Output (-) for front
Power GND
Non connection
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9
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2
9
8
TEL 13942296513
9
9
2
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9
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2
9
8
0
5
1
5
1
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6
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3
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