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NAD S250 - Schematic Diagram

NAD S250
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J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7
J1-8
J1-9
J1-10
F1
T6.3A 250V
F2
T6.3A 250V
C24
0.1
C25
0.1
R63
1R
Q26
MPSA06
Q25
2N6488
R65
7K5
C33
100u/16V
D19
IN4744
D20
IN4744
C34
100u/16V
R66
7K5
Q27
MPSA56
Q28
2N6491
R64
1R
R67
2K2
R68
2K2
C35
470u/16V
C36
470u/16V
1
6
7
+
-
U2A
LM339
2
4
5
+
-
U2B
LM339
11
10
13
+
-
U2C
LM339
14
8
9
+
-
U2D
LM339
12
3
U2E
LM339
4
8
U1C
NE5532
C37
0.1u
C38
0.1u
C28
0.1u
C27
0.1u
R57
1M
R58
200K
D17
IN4004
C13
22u/25V
20%
D16
IN4148
R54
20K
Q1
2N4403
R56
1M
R61
20K
R55
200K
R62
20K
R83
2K21 1%
R72
51K
ILIMIT
R69
100K
R70
200K D15
IN4148
C18
22u/25V
D18
IN4148
+12V
+12V
-12V
+12V
AMPOUT
R76
51K
C20
22u/25V
D22
IN4148
D21
IN4148
R73
20K
R75
510K
R74
20K
+12V
R80
825R
R79
1K
R81
15K 1%
R78
2K21 1%
R77
11K5 1%
R85
100R
+12V
PROTECT
1W
FP
20%
2%
1W
FP
V+
V-
20%
20%
50V 50V
50V 50V
1%
NTC
1/2W FP
20%
20%
C26
R60
D14
D23
4
4
4
4
PROTECT LED
COM
V-
V+
4
4
INSERT BUSS WIRE JUMPER 401-20003-00 FOR
R22. R50
SIGNIFIES SAFETY CRITICAL COMPONENTS
REFER TO THE SAFETY INFORMATION SECTION OF THE
SERVICE MANUAL FOR COMPLETE INFORMATION.
COMPONENTS NOT INSTALLED:
C10. C12. C14. C15. C21. C26.
D1. D2. D13. D14. D23. D24
R8. R20. R49. R52. R53. R60. R67. R68 AND R84.
ABBREVIATION: FLAME PROOF = FP.
ALL FP DESIGNATED PARTS ARE SAFTEY
CRITICAL REFER TO NOTE 5.
ALL CAPACTORS ARE IN MICROFARADS.
10%. 100V. ( DEFAULT VOLTAGE )
ALL RESISTORS ARE IN OHWS 1/4W 5%
7
5.
4
3.
2.
1.
RYDRV
AGND
GND
GND
AGND
+VCTL
-VCTL
GND
+12V
-12V
AGND
AGND
SCHEMATIC DIAGRAM
POWER AMP 1

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