JVC RX-DV31SL Service Manual page 54

6.30 NJM2279M-W (IC402,IC403,IC404) : 3-input 2-output video switch
• Pin Layout
14 13 12
1 2 3
• Block Diagram
6.31 NJM4580E-W (IC911,IC921,IC941,IC951,IC971,IC981,IC991 to IC994) : Ope amp.
A OUT 1
A -IN 2
A +IN 3
V- 4
1-54 (No.22023)
11 10 9 8
1
2
4 5 6 7
SW2
Vin1
20k
Vin2
20k
Vin3
20k
20k
SW1 MUTE2
8 V+
7 B OUT
6 B -IN
5 B +IN
• Pin function
1 Vin3
2 SW1
3 Vin2
4 MUTE2
5 Vout2
6 GND2
7 GND1
+
MUTE1 V
AMP. Driver
6dB 75
20k
4.45k
4.14k
AMP. Driver
6dB
75
4.45k
4.14k
-
GND1 GND2
V
8 V+
9 N.C.
10 Vout1
11 MUTE1
12 Vin1
13 SW2
14 V-
Vout1
Vout2