Ic Block Diagram - NAD Original instructions Service Manual

IC BLOCK DIAGRAM

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