HK 3470 - Harman Kardon Audio Service Manual (repair manual). Page 13

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IC 111 : KA78XX
IC 112 : KA79XX
VOLTAGE
REFERENCE
+
-
PROTECTION
CIRCUITRY
R1
R2
Rsc
GND
I1
I2
Out
In
Q1
Q2
Output
Input
 HK3370 / HK3470
6680
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