NAD M27 Service Manual page 22

6.SMPS BOARD(3/5)
PVBUS
C76 C75
10n 10n
HV
P P
i
R121
HV
10R
D42
i
TR4A
2 3 BAW56W T45
BC807
T46
BC817
R118 R117
1 1k 100R
TCT15
R65
10R
D22
TR4B BAW56W T22
3 3
BC807
T21
BC817
R64 R63
4
1k 100R
TCT15
PVAUX
Sheet5 - Main SMPS Control.SchDoc
PSVAUX PSVAUX
PVSTART PVCTRL
ACDET PROT
i
P S
1n C16
C72
TR2
220p
T1 TR4G
3 12
SPW32N50
R99
14
68R
13
TCT15
R98
68R HV
i
1 12
TR4E 3 8
S
C69
T2 220p
SPW32N50
13
R86
C10
68R 9
470n
TCT15
HV
R79
i
3
68R
ISEN 11
R69
R48
C12
0R018
470n
12R
10
P P
D35
7
SS16
9
6
C11
220u 8
P
5 S
P
PTC
TCT57
ISEN
ISEN
R40 R35
C54
T3
10R 10R
220p
D21 D14
FDP61N20
TR4F
BAW56W 3 11 BAW56W
R42
68R
T20
BC807
R39
R41 68R R36
1k 10 1k
TCT15
R17 R10
C43
T5
10R 10R
220p
D9 FDP61N20 D5
TR4D
BAW56W R28 3 7 BAW56W
68R
T17
BC807
R18
R19 68R R11
1k 9 1k
TCT15
+VDR
D18
L10
+VDR
330R/1.5A
MURA220T3
C50
C20 C25
220u 220u
1n
L11
-VDR
330R/1.5A
-VDR
R46 C51
12R 1n
+VAUX
D19
L12
+VAUX
330R/1.5A
MURA220T3 C21 C26
220u 220u
S S
R47 C52
12R 1n
-VAUX
D20
L13
-VAUX
330R/1.5A
MURA220T3
C22 C27
220u 220u
S S
VSW
22
L1 1u/8A L3 1u/8A
L2
L4
T4 1u/8A 1u/8A
C49
220p
FDP61N20
C18 C19
R37
220u 220u
68R
T19
BC807
R34
68R S S S
S S S
T6
C38
220p
FDP61N20
R2
C29 C34
68R
220u 220u
T11
BC807
R3
L9 1u/8A L7 1u/8A
68R
L8 L6
1u/8A 1u/8A
Sheet6 - Seconday Control.SchDoc
PSEN
+5VSB +5VSB
nAMPON
AMPOFF
nFATAL
VSW
VSW
OVL
+VB
+VB
C30 C39
R26
220u 100n
47k
S S
S S
C33 R4
C37
220u 100n 47k
-VB
-VB
PSEN
nAMPON
AMPOFF
nFATAL
OVL