Onkyo TX-SR503, Service Manual

Page: 80 / 142

IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-20
Q1519: NJM2585L (WIDE BAND 3-INPUT 1-OUTPUT 3-CIRCUIT VIDEO AMPLIFIER)
BLOCK DIAGRAM
TRUTH TABLE
TX-SR503/503E/8350
CH1 OUT 75ohms
Driver
6dB
Amp
75ohms
Driver
6dB
Amp
75ohms
Driver
6dB
Amp
Bias
Bias
Bias
Bias
Bias
Bias
Bias
Bias
Bias
Cont1
Cont1
Cont1
Cont2
Cont2 Cont2
22
20
21
17
18
19
14
15
16
12
13
1
3
2
6
5
4
9
8
7
11
10
Power Save
CH2 OUT
V+2
CH3 OUT
GND
CH3 IN1
GND
CH3 IN2
GND
CH3 IN3
CH1 IN1
SW Control 1
CH1 IN2
SW Control 2
CH1 IN3
V+1
CH2 IN1
GND
CH2 IN2
GND
CH2 IN3
CONTROL TERMINAL
Power Save
Parameter Status Note
H
L
OPEN
Power Save: OFF
Power Save: ON
Power Save: ON
Parameter Status Note
SW Control
SW1
L, OPEN
H
H
SW2
X
L, OPEN
H
IN1 (X=don't care)
IN2
IN3