Harman Kardon AVR 2550 - AVR 2550 Information Display; Front Panel Indicator Explanations

GND 1
TC9215AF
OFF 2
3S
10
S
11
S
12
S
20
S
21
S
41
S
40
S
42
S
34
S
32
S
31
S
30
V
ss
DD
4
5
6
7
16 V
15
14
13
12
11
10
8
9
TC9215AF (TONE CONTROL : IC80)
BLOCK DIAGRAM