NAD C 730 Service Manual page 20

U501: NJM4558D
U702, U703: NJM5532
U704: TL072CP
AMPLIFIER 1
OUTPUT 1
INVERTING
2
INPUT
NON-INVERTING
3
INPUT
4
V Ð
U901: LA1837
30
ALC
BUFF
FM
S-METER S-CURVE
AM IF
1
AMPLIFIER 2
8
V +
7
OUTPUT
Ð + + Ð
INVERTING
6
INPUT
NON-INVERTING
5
INPUT
29 28 27 26 25
REG
AM AM
AM
MIX RF.AMP
OSC
AGC
AM IF DET
SD
COMP
AM
S-METER
AM/FM
IF-BUFF
TUNING
DRIVE
FM
DET
GND
2 3 4 5 6
U603: NJM78M
INPUT
24 23 22 21 20
3 rd 5 th
DECODER
ANTI-BIRIDE
P-DET
STEREO
¯
SW
VCO FF
304kHz 38k
STEREO
DRIVE
V
CC
7 8 9 10 11
22
3
1
OUTPUT
2
GND
19 18 17 16
MUTE
FF FF PILOT
19k 19k
DET
12 13 14 15