Schematic Diagram - NAD 712 Service Manual

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SCHEMATIC DIAGRAM
PSU & MAINS
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1C502
#33RFP3W
#LiNK
D505
ae
+12V
5
LM7812
' 3.3V 1.3W
3.3V1.3W
+33V
1N5401
AC OUTLET FOR AH VERSION ONLY
CHASSIS
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c2
Z\ Snziag0 x CLASS
A\ Gn7/400 x CLASS
ov
P503
D508
9
# T4A 125V UL/CSA
ee
T4A 250V SEMKO/VDE
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1
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t
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1
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1
1
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1
1
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1
1
1
1
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1
t
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1
b
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4
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:
-12V
1C503
D518 PA
D517
-33V
D507
;
LM7912
#47RFP3W~
#LINK
3.3V 1.3W
3.3V 1.3W
;
1
1
1
!
I
1
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1
1
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1
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1
A
1
1
!
!
I
1
!
I
1
IC501
+5V
.
LM7805
4
+5VUNREGL
+5VUNREG
+5V +12V
+30V
+33V
+38V
P507
P17
BLK
BLACK
TF
BLACK
P505
aaape
Bee
P506
N18062120
== 1/50
ro
BLack
AN
F507
J
P508
BLK
C~O
——O
# T315mA 250V UL/CSA
OV -12V
-28V—s-33V
T315mA 250V SEMKO/VDE
LK6
P7
WHITE
YELLOW
oud
OV
230V
WHI
~
P6
RED
120V
RED
fore
Q507
ais
YELLOW
+30V
Q521
+38V
28D669
10 1W F
P9 BLU piue
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8 BAW _prown TF
N48
R519
R513
Bans
3K6
aS
ee
eT
eee
eee SLR? Seen
2 rere
ae ;
== 10/50
cs520
|
|
R520
1K5
+
12K
e527,
th
20
=
Q509
=
28C1s15Y
| C518
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rsos /\
1K2
ain
¢
O~O
O
220/50
| 470/63
D511
# T315mA 250V UL/CSA
RS102
sig
T315mA 250V SEMKO/VDE
PROG PSU
ov
:
30
4
fo
R521
¢
100
R522
R518
'
1K2
1K2
Q510
F506 /\
.
:
2SA1015Y
P506
Resistors: F - Fusible
+
C526
O™mO
O
FP - Flame Proof
== 220/50
# T315mA 250V UL/CSA
Not specified are Carbon Film
22p
R516
T315mA 250V SEMKO/VDE
R524
C521
gnats
12K
4. D513
HZ27-2
pace o523
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NOTE:
1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/4 WATT.
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2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.
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ECB
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:
R512
3. COMPONENTS MARKED WITH " #" ARE AH VERSION ONLY.
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BOSS
SCOT
-28V
Q508
100
F1W
AN
4. COMPONENTS MARKED WITH "A\" ARE SAFETY CRITICAL PARTS.
2SB649
#100 FP 2W
17
18
NAD-00126 / DRUCK 4

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