NAD Original instructions, Service Manual, Page: 22 / 25

IC BLOCK DIAGRAM
2
1
3
8
7
6
5
4
+
-
OFFSET NULL
OFFSET NULL NC
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
V-
V+
1
2
3
4
5
6
7 10
11
12
13
14
15
16
8
9
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
GND
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
COMMON FREE
WHEELING DIODES
2
1
3
8
7
6
5 4
1A
1E
1K
2C
2A
2E
2K
1C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1A
1B
1Y
2A
2B
2Y
GND
V
CC
4B
4A
4Y
3B
3A
3Y
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OUTPUT 1
INVERTING
INPUT 1
NON-INVERTING
INPUT 1
V +
CC
NON-INVERTING
INPUT 2
INVERTING
INPUT 2
OUTPUT 2
OUTPUT 4
INVERTING
INPUT 4
NON-INVERTING
INPUT 4
V
CC
-
NON-INVERTING
INPUT 3
INVERTING
INPUT 3
OUTPUT 3
- + -
+
- + -
+
INPUT LOGIC
1 2 3
4 5 6 7 8 9 10
V1
CC
V1
CC’
OUT
2
IN
1
GND
GND
IN
2
OUT
1
V’
2
CC
V2
CC
2
1
3
8
7
6
5 4
+ +
- -
OUTPUT A
OUTPUT B
INVERTING
INPUT A
INVERTING
INPUT B
NON-INVERTING
INPUT A
NON-INVERTING
INPUT B
V-
V+
A
B
Q209-Q210: AD712JN
HIGH PERFORMANCE DUAL OP-AMP
Q301-Q302: AD711JN
HIGH PERFORMANCE MONO OP-AMP
Q319-Q320: TL074CN
LOW NOISE QUAD OP-AMP
Q401: ULN2003A
7 DARLINGTON ARRAYS FOR RELAY DRIVE
Q402: LB1642
MOTOR DRIVER
Q103: 74HCT00
2-INPUT QUAD NAND GATE
Q403: TIL198B
DUAL OPTOCOUPLER
22