NAD M55 - Circuit Diagrams; Power(Smps) Circuit Diagram

9
5
3
1
17
14
15 13 12 11 10
16
18
T900
%&.$& / DCK-28-002
% '%
57
17&'
&
X9
5
.
5 .
' )5
& X9
' )5
5
.:
&
.9
5
5
8 3&
'
)5
' )5
5 .
'
9
&
X9
5
.
4
$
5
.
' )5
5 5
5 .
8 7/
5
.
&
XY
5
.

5
.

5
.
&
39
5 N
& 8
4 &
5 .
)+
)86(B+2/'(5
1
2
-
/ P+
& X9
&
X9
&
X9
/ 8+
5 .
' 6565
Vi
1
Vo
2
g
3
Vd
4
8
.$5
5 .
&
X9
& X
/ X+
' 65
/ X+
&
89
&
X9
9&&$ $*1' 9&&$
4 &
& Q9
4 &
4 &
4 &
4 $
5
.
5
.
5
.
5 .
5
.
5 .
5 .
+5VD
-22V
5
0<*'.
96
9' '*1' 9' 96
6*1'
96
+5VS
& X9
Vi
1
Vo
2
g
3
Vd
4
8
.$5
&
X9
& X
3.3VD
+5VD
9&&$
67%
9&&$
' )5
&
X9
/ X+
+5VD
4 .6$
5
.
4 &
5
5:
5 .
9&&$ 9&&$
&
X9
'*1'
4
.6&
5
N
5 .
+3.3VV
99
5 5
9'
&
X9
9'
a$&,1
-22V
VF+
VF-
VF+
VF-
9&&$
9&&$ 99 *1'
*1'
99
9 9) 9)
& X
&
89
&
89
STB
STB
Vi
1
Vo
2
g
3
Vd
4
8
.$5
3.3VD
5
.
99 9'
9' 9' 67% 96
GND
1
Vcc
2
Vfb
3
Ipk
4
Vstr
5
Drain
6
Drain
7
Drain
8
8
)6'051%
&
39
&
39
5 5:
CT81-400VAC 14d-2E4-332M-YA
CT81-400VAC 08d-2E4-101K-YA
YA ---X1 Y1
&
X9
600mA
Vi
1
Vo
2
g
3
Vd
4
8
.$5
+5VS
' 1
5
N
&
X9
600mA
5 5:
5 .1$
AC SOCKET
6:,7&+
72-
9'
&" 
1
2
3 4
5
6 7
8 9
10
11 12
13 14
15
J906 CON15*2MM
1 2
3 4 5 6
J907 TO VIDEO
+12V
+15V -15V
Vin
1
GND
2
+12V
3
U902 MC78L12CP
Vin
2
GND
1
-15V
3
U901
MC79L15CP
&
89
R901 RES2
Power dead
U900 M
aybe defective
VF+ Power dead
D910 maybe defactive
-22V dead
D912 Maybe defective
+5VD dead
D916 Maybe defective
CIRCUIT DIAGRAMS
1.POWER(SMPS) CIRCUIT DIAGRAM
3-29