NAD C 521BEE Schematic Diagrams page 11

MAIN BOARD
U305, U306: NE5532
AMPLIFIER 1
OUTPUT 1
INVERTING
2
INPUT
– +
NON-INVERTING
3
INPUT
4
V –
MAIN BOARD
U501, U502, U504,
U506, U507: 78XX
IN
AMPLIFIER 2
8
V +
7
OUTPUT
+ –
INVERTING
6
INPUT
NON-INVERTING
5
INPUT
OUT
GND
MAIN BOARD
U403: TC74HC00AP
A1 1
2
B1
3
Y1
A2 4
B2 5
Y2 6
GND 7
MAIN BOARD
U503: UPC79M12HF
GND
- 21 -
VCC
14
13 B4
12 A4
Y4
11
B3
10
A3
9
Y3
8
V 0
V 1