Onkyo HT-R530

IC BLOCK DIAGRAM AND TERMINAL DESCRIPTIONS-19
Q1503. Q1512, Q1513: LA7956 (Video switch)
BLOCK DIAGRAM
TRUTH TABLE
TX-SR503/503E/8350
S2
(Pin 2)
H
L
H
L
S3
(Pin 3)
H
H
L
L
Vin1
(Pin 4)
ON
OFF
OFF
OFF
Vin2
(Pin 6)
OFF
ON
OFF
OFF
Vin3
(Pin 8)
OFF
OFF
ON
OFF
Vin4
(Pin 9)
OFF
OFF
OFF
ON
driver control
6dB
amp
video switch
(4input 1output)
123 4
VIDEO
OUT
A B VINI
5
GND
6
VIN2
7
VCC
8
VIN3
9
VIN4