NAD M27 Service Manual page 21

6.SMPS BOARD(2/5)
L
N
PVAUX
C70
AC1
10n
PSVAUX
PSVAUX
R102
T39
BC846BW
D39
R103
BAS316
P P
PSVAUX
MAINS AC Detection
C15
AC2
S
1n
HV HV
i i
AC1
R54 R50
C8
220n
C14 TR3
470n
2mH/8A
R55 R51
R1
AC2
10R
i i
HV HV 12V 7
6 K2B 4
3
5
8
i
HV
R120
D44 AC2
390k
SS16
PVSTART
R97
R91 R119
T37
R95
P
BC856BW
R96
3
BC846BW
R100
T42
2
D40
T38
C71 BAT54J
BC846BW
220n
U6
TL431
R101 R115
P P P P P P
U3C
R124
3
4
2k2
LTV827S-V
PVBUS
C48
C17
10n
470n
P P
D8
PSVAUX
SS16
C32
R38
5k6 220u
P
U1
3
1
VCC DRAIN
2
FB
C28
100u
4
GND
NCP1014
P
HV
i
D3 D1
C1 C3 C5
BYT79X-600 BYT79X-600
1000u 1000u 1000u
8
5
3
6 4
7 C2 C4 C6
12V
1000u 1000u 1000u
D4 D2 K1B
BYT79X-600 BYT79X-600
i
HV
R81
R112 R108
2k2
T43
BC807W D32
U7A 12V
R109
LM393
6
1
7
5
U7B
LM393
C9 D41 K1A
22u 12V
R107 BAS316
P D38 P P P
BAT54J
Automatic MAINS Voltage Selection
P S
1n
HV
TR5
i
SBY L5
1 7
65R/7A
C45
100n
D10
C23 C31
P4SMA200A
1500u 1500u
S
15MQ040N
D13
D11 6
HV
BYG20J
i
C42 R29
2
S S
180p 10R
4
R45 R49 R43
10k 220R 10k
U4C
LTV827S-V
3
C53
100n
P
R44
U2 10k
TL431
R25
12R
U4D S S
D17
C41 LTV827S-V
15V
1n
P P P
21
VDC
PVBUS
R122
TR1
2mH/8A
C7
470n
R123
P
R116
T36 VDC
390k
BCP56
C74
R113 100n
K2A D43
12V BAS316
T44
R114 BC856BW
T41 R111 R110 R104
BC846BW
P
D36
T40
BC817W
12V
C73
R106 R105
100n
P P P P P
D34
R90
ACDET
BAS316
1k
Inrush Current Limiter
+5VSB