Schematics - NAD C 725BEE Service Manual

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R531
0.05/3W 5% CE
Q510
A1015
-46V
+46V
CB54
R533
R534
4
1M
2K2
3
2
1
To Main board
CB53
TRIG
1
I-V
2
AC DET.
3
4
+12V
5
6
7
+37V
DGND
+5.5V
To Main board
R576
-37V
0.33,1/4W
CB59
Transformer Protect Det.
7
6
Standby
5
+39V
4
3
DGND
2
1
To Key board
IC52
+12V
LM7812M
C549
2200uF/35V
IN
D536
DB104
C554
C553
100uF/25V
0.1uF
DGND
C725BEE POWERBOARD
R562
R561
1K
R563
100
22K
R532
220
Q517
A1015
R558
1K
D531
Q59
TIC116D
A1015
!
R569
C517
330K
15000uF/50V 10%
+
C518
D55
15000uF/50V 10%
KBU8D
D532
TIC116D
Q518
R565
R560
C1815
100
1K
Q519
R564 22K
R559 1K
R566
A1015
4K7
Q520
C1815
D513
R544
22K
1N4004
C546
330uF/10V
L52
10uH
D59 SR540
C545
C536
C533
330uF/10V
0.1uF
DGND
IC53
R570
100
R571
510
4V7
D57
+39V
Q58
KSC2690
R568
3K3
C55
D53
10uF,63V
C53
330u/63V
39V
DGND
+5.6V
IC55
C551
C550
100uF/16V
0.1uF
DGND
!
-
+
-
C52
C51
10n/250V
10n/250V
10%
10%
D51
KBU8D
D56
C523
DB104
3300u/50V
C524
2200u/50V
2.2nF/250V,Y1
D510
DB105
T51
C534
10nF/1KV
C531
10uF/400V
FR107/UF4006
R572
D58
EE16
1
8
100K/1W
UV
S
2
7
BP
S
6
S
4
5
IC51
D
S
TNY274
PC817
C530
0.1uF/16V
PGND
PGND
DGND
R574
Standby
4K7
R567
15K
D54
D52
C54
DB104
6V2
47uF/25V
DGND
LM7805M
IN
D538
DB104
C552
4700uF/25V
D537
DIODE
CB55
CZ55
!
1
3
2
2
!
3
1
CB56
CZ56
!
1
1
C535
2
2
!
4n7/400V
3
3
F51
T4AL/250V For 120V Mains Version
!
T2AL/250V For 230V Mains Version
C56
0.22uF
L51
FILTER INDUCTOR,48mH
CB58
CZ58
!
!
3
3
2
2
!
1
1
CB57
CZ57
!
1
1
!
3
3
CB51
CZ51
36.4V
RED
5
5
36.4V
PURPLE
4
4
0V
BLACK
3
3
28.5V
ORANGE
2
2
28.5V
GRAY
1
1
+5.5V
RL51
Relay-SPST
D533
1N4148
C544
10nF
R575
Q522
C1815
4K7
CZ52
CB52
AC POWER CORD
POWER SWITCH
SW52
!
AC OUTLET
1
1
2
2
C725BEE TRANSFORMER
DGND

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