Service manual

21HT-15C
21HT-16C
25
AN7523(IC303)
AN5522(IC501)
1 2 3 4 5 6 7 8 9
V
CC
Output
GND
Output
Standby
Input
GND
N.C.
Volume
Pin No. Description
1 Vcc
2 Ch Output (+)
3 GND
4 Ch Output (-)
5 Standby
6 Ch Input
7 GND
8 N.C
9 Volume
Circuit Function Block Diagram
Pin Descriptions
Note: Do not apply voltage or current to NC pin from outside
Pin No. Pin Name
1 Inverting Input
2 Power Supply
3 Pump-up Output
4 GND
5 Vertical Output
6 Vertical Output Power Supply
7 Non-inverting Input
Pin Descriptions
Non-inverting Input
Output Vcc
Output
GND
Pump Up Out
Vcc
Inverting Input
123
4
56 7
Pump Up
Thermal Protection
Amp
+
-
Circuit Function Block Diagram