KD-SX985
1-40
6
Muting &
ON Time control
Circuit
Protectiv
e
circuit
Ripple
filter
Stand by
switch
Mute
circuit
Protectiv
e
circuit
24
16
23
21
18
19
17
22
14
13
25
15
10
4
2
3
5
8
7
9
12
1
11
20
LA47503 (IC301) : Power amp
1. Pin layout
2. Block diagram
1
25
3.Pin function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
Output (+) for rear Lch
Output (-) for rear Lch
Output (+) for front
Output (-) for front
No connection
AC CONT1
GND1
OUTFR-
STBY
OUTFR+
Vcc1/2
OUTRR-
GND2
OUTRR+
VREF
INRR
INFR
SGND
INFL
INRL
NC
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299