Harman Kardon AVR125 Service Manual page 51

AVR125
L-OUTA
L-INA
L-A-GNDA
L-OUTB
L-INB
L-A-GNDB
L-OUTC
L-INC 10
L-A-GNDC 11
TC9215AF (TONE CONTROL : IC80)
BLOCK DIAGRAM
TC9482F (ELECTRONIC VOLUME/INPUT) : IC31
NC VSS
2 1
3
1dB
4
VR
latch
8dB
VR
5
latch
6
1dB
7
VR
latch
8dB
VR
8
latch
9
1dB
VR
latch
8dB
VR
latch
Shift register (32BIT)
CS1 12
GND 13
CK 14
GND 1
OFF 2
S 10
S 11
S 12
S 20
S 21
V ss
VDD
28
3 to 7
decoder
Same as L-ch
4 to 13
decoder
Strobe generate
circuit
Level shift circuit
TC9215AF
3
4
5
6
7
8
51
harman/kardon
TEST
27
3 L-OUTA
L-INA
4
5 L-A-GNDA
L-OUTB
6
7 L-INB
Circuit
8 L-A-GNDB
L-OUTC
9
10 L-INC
L-A-GNDC
11
12 CS1
GND
13
CK
14
16 V
DD
15
S 40
14 S 41
S 42
13
12 S 34
11 S 32
10
S 31
9
S 30