Harman Kardon AVR 3550 Service Manual page 44

TC9482F (ELECTRONIC VOLUME/INPUT) : IC31
NC
2
L-OUTA 3
L-INA 4
L-A-GNDA 5
L-OUTB
6
L-INB 7
L-A-GNDB 8
L-OUTC
9
L-INC 10
L-A-GNDC 11
CS1 12
GND 13
CK 14
VSS
1
1dB
VR
latch
8dB
VR
latch
3 to 7
1dB
decoder
VR
latch
8dB
VR
4 to 13
latch
decoder
1dB
VR
latch
8dB
VR
latch
Shift register (32BIT)
Level shift circuit
VDD TEST
28 27
Same as L-ch
Circuit
Strobe generate
circuit
3 L-OUTA
4 L-INA
5 L-A-GNDA
L-OUTB
6
7 L-INB
8 L-A-GNDB
L-OUTC
9
L-INC
10
L-A-GNDC
11
12 CS1
GND
13
CK
14