NAD T737 Service Manual page 29

BLOCK DIAGRAM (IC133: NJM2581)
VEE1
VIN2
VEE2
VIN3
VEE3
PowerSave
BLOCK DIAGRAM (IC135: NJM2586A)
CH1 IN1 1
Bias
Cont1
SW1
2
Cont2
CH1 IN2
3
Bias
SW2
4
CH1 IN3
5
Bias
GND
6
+
V 1
7
CH2 IN1 8
Bias
GND 9
10
CH2 IN2
Cont2
Bias
11
GND
CH2 IN3
12
Bias
DMP24
VIN1 1
BIAS
2
3
BIAS
4
5
BIAS
6
7
6dB
75
24
Amp Driver
23
Cont1
6dB
75
22
Amp Driver
21
Cont1
6dB
75
20
Amp Driver
19
18
17
Bias
16
15
Cont2
Bias
14
13
Bias
75 Ω
6dB
Driver
AMP
75 Ω
6dB
AMP Driver
75 Ω
6dB
AMP Driver
REF
CH1 OUT
CH1 IN1
PS 1
CH2 OUT
SW1 2
+
CH1 IN2
3
V 2
CH3 OUT SW2
4
GND
CH1 IN3 5
+
-
V 1 6
V 2
CH3 IN1 CH2 IN1 7
-
V 1 GND
8
CH2 IN2
CH3 IN2 9
10
GND
GND
CH2 IN3
CH3 IN3 11
2-16
+
V 1
14
13 VOUT1
+
12
V 2
VOUT2
11
+
10 V 3
9 VOUT3
8
GND
6dB
Amp
Bias
Cont1
Cont1
Cont2
6dB
Amp
Bias
Cont1
6dB
Amp
Bias
Bias
Cont2
Cont2
Bias
Bias
SDIP22
75
CH1 OUT
22
Driver
21 PS
75
CH2 OUT
20
Driver
+
19 V 2
75
CH3 OUT
18
Driver
-
V 2
17
CH3 IN1
16
Bias
-
15 V 1
CH3 IN2
14
Bias
GND
13
12 CH3 IN3
Bias