Casio LD-50 - Main Features; LIGHTING GUIDE SYSTEM; Touch Response; 50 Versatile Rhythms

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Pin. No. Terminal In/Out Function
CIRCUIT DESCRIPTION
Power Amplifier (LA4550)
The power amplifier is a two channel amplifier which connected in BTL mode. The following table shows the
pin function of the LSI.
1
2
3
4
5
6
7
8
9
10
11
12
G0
G1
NC
OUT2
BS2
NF2
IN2
DC
PREGND
IN1
NF1
BS1
OUT1
VCC
PWGND
TAB
Not used
Channel 2 Output
Terminal for a bootstrap capacitor
Negative feedback input
Channel 2 Input
Terminal for a decoupling capacitor
Ground (0V) source
Channel 1 Input
Negative feedback input
Terminal for a bootstrap capacitor
Channel 2 Output
+9V source
In Ground (0V source)
In Ground (0V source)
---
Out
---
In
In
---
In
In
---
Out
In
GND
GND