NAD CI 940 Service Manual page 13

4.PSU & DCDC BOARD
Q901
BT139X-600E
R910
150R
10nF 500V
U902
C901 6
6 A
4
4 K
R911
MOC3043
R901 150R
390K
VCC
R902 R903
390K 10K
U901A
2 LM393
1
3
R904
10K
1
IC901
D905 C922
TL431
BAT54J 22uF/25V
GNDP
R921 R924
100K 100K
BC846BW
Q918
Q926
BC856BW
R922
100K
R959
D907
2.2K C921 R923
BAS316
220nF/25V 100K
VCC
D913
R810 R811
390K 390K
BAT54J
R909 R98
10K 10K
MOD901
MAC
C945 C974
10nF/1000V 10nF/1000V
BR901
1
4 L909
GNDP
20mH
15A/1000V
L901
22uH/6A
C908 C909
10nF/1KV 10nF/1KV
R917
100K
GNDP
200V/680UF
R918
C902 C977 100K
2.2R
R928
VCC
R916
1
R919
1K
200V/680UF 100K
R936
2
1K
C903 C978 R920 1 D901
100K B BAT54J
C904 Q904
T901C
BC817
6
1U/25V
TR
GNDP
1
D902
B
Q902 BAT54J
R912 BC807-16
1M
U901B
GNDP
LM393 GNDP
6
7
5
R905 R972 R906
10K 10K 47K
C924
1n/50V R965 C925 R967 R960
D906 D908
BAT54J BAS316 D910 47K 2.2uF/25V 47K 2.2K
BAS316
R943
Q928 1
OC
VCC BC856BW 2
1K
16
C906 R944 15
R913
1K GNDP
D909 220K
1u/25V
4
BAS316
R963
R925 R962 3
Q927
100K 47K
10K BC856BW
R926
BAS316
100K
D911
Q920 R973 Q922
BC846BW 4K7 BC846BW
Q921 R966 R907 R974
Q919
BC846BW 47K 10K 1.2K
BC846BW C923
R964
104 47K
GNDP
R914
C905 1M
R915 C976
GNDP
1u/25V 1M 1uF/25V
GNDP
OC
CY901
1nF
C973
HV
10K 100N 50V
R813
BD901
3 T909
D912
GNDP
P6KE200
3 2 10uF/400V R983
C946 2M
10uF/400V C957
D918
UF4006
0.8A600V
4
R984
5
2M D919
1N4148
6
EE19
C949
10uF/50V
R985
C948
22k
100pF/1kV
5 4
S D
6
S
C947
7 2
S BP
104
8 1
S UV
U908
TNY280
18V3W
D923
F901
1.25AL250Vac
K901
2 1
2 1
4 3
VCC 4 3 GNDP
R997 R998
2M 2M
CY903 HF36F
1nF
D922 L910
CX902
20mH
CX901 470nF/275VAC
470nF/275VAC
M7A R999 R949
CY904
2M 2M
1nF
NTC901
SCK200710LSY
150P/200V
C911
C917
R929 470nF/275VAC
T902 10R
BAW56W
Q912
FDP18N50
R951
R937 22R
T901B Q906
1K
D903
TR BC807-25
BAT54J
Q905 R938
C910
1K
BC817
7
1UF
BC807-16
D904
Q903
BAT54J
R981
10R
GNDP
R930
T903 10R
R978 C918
BAW56W
22R 470nF/275VAC
Q913
VCC
FDP18N50
R935
10R
C916
Q911
C907 T901A
BC807-25 150P/200V
TR
1u/25V
R945
GNDP 1K
U904
8
1IN+ C1
1IN-
9
R946
2IN+ E1
2IN-
11 3K
C2
DTC R908 C927 R976 R977 X4
10
1.8K 1nF 0R33 0R33
E2 *
FB
OC
Q923
BC846BW
GNDP
TL494
R975
GNDP
C926
18K
470P
VCC
AC Detect
R980
R982
NC
10K
U903
R986
10K R900 Q924
D917
NC
BAS316
NC
PC817
R992
X2
5.6K
NC
GNDP
-15VD
C951
R987 82R
1nF/200V
9
10 L904 3.3UH
D921
+13VR +13VS
1 8
S D
104
MBRS3100T C952 C954 C955
2 7
104 C956 S D
8
7
3 6
1000uF/25V 330uF/25V
S D
D920
VCC1
1 4 5
G D
MURS120 R99 R969
Q932
C950
30K 10k AO4423
2 100UF/35V
GNDP
R955
220R
Q930
DTA114EKA
Q933 R995
2SC3326
R989 10k
2k +13VS
+13VR C930
U909 PC817
100P
R988 R991
1k 13K
C953
R990
U906 L7812
TH901
10k 3
VCC OUT IN
104
90
GND
1 C959
U911
100nF
TL431 R970 3K
C962
100uF/25V
X1 NC
J903
1
ZV901
2
10D471
3
CON3-3.96
15
R931 150P/200V
T904 10R
C912
BAW56W
Q914
AOT412
Q907
T901G
BC807-25
T901D TR
R939
TR
1K
T908
3 16
R957
C919
R932 22R
1.2nF/200V
T905 10R
BAW56W
R952
2
12R/1206 Q915
AOT412
14
Q908
13 T901E
T901F
BC807-25
SGND TR 150P/200V
TR
R940
12R/1206 C913
1
1K
R953
C920
1.2nF/200V
15
0.1R/1206 U905 LM317
R979
9
3 2 +15VD
IN OUT MURA220T3
MURA220T3
D914 D916
249R
C942 C935
C933
R954
104
R948
10 12R/1206 C936 R947 C938
1nF/200V 1nF/200V
1000UF/35V 2.7K 330UF/25V
11
C928
8 4.7uF
SGND
12
L906
65R7A
EC42 SGND
V+
C965 C970
50V/560UF
100nF/200V
GNDP CY902 SGND
1nF
SGND
SGND
100nF/200V
C964 C971
50V/560UF
V-
L905
65R7A
100N L804
C814
R830
VD
10uH
1R
D803
U801
B340A-13-F
C819
1 10
BOOT PH
100uF
2 9
C810 C811 C812 R826 VIN GND
2.2uF 2.2uF 100nF 332k 3 EN COMP 8
4 7
SS/TR VSNS
5 6
RT/CLK PWRGD
R831
TPS54140 C816
R827 C813 80.6k
5.6pF
62K 12nF R828
90.9K
C817
2700pF
GNDs
U912 KA78R12
1 2
Vi Vo 12VD
C943
C972 R899 C937 X3
100N
330UF/25V 1k R898 330UF/25V NC
10k
SGND
5VS
R996
STB
4.7k
Q931
2SB647-D VCC1
1
R971
C960
C963 47K
100nF
100uF/35V U910 PC817
R993
12VD
C961 5.6K
1K
100nF R994
GNDP
V+
R933
150P/200V
T906 10R
C914
BAW56W
Q916
AOT412
Q909
BC807-25
R941
1K
R958
22R
R934
T907 10R
BAW56W
Q917
AOT412
Q910
BC807-25
R942 150P/200V
1K C915
V-
SGND
1000UF/35V
C940
C939
4.7UF
R927 330UF/25V
2.7K C941
R956 R950
C944
249R 104
12R/1206
2 IN OUT 3 -15VD
U907
LM337
L907
65R7A
VOUT+
R968
C966 C968
30K
50V/560UF 50V/560UF
50V/560UF 50V/560UF
R961
C967 C969
30K
VOUT-
L908
65R7A
5VS
C929
C931
470uF/10V 100n
R834
C821
52.3K
100uF
J888
R868
GNDs
10K 5VS
1
GNDs
2
CON2
J801
VD
2
GNDs GNDs
1
CON2
C932 C934
10n 10n
EARTH1 EARTH2
R801 R802
10R 10R
J904
J901
1
1 2
-15VD
2
CON2
3
AC Detect
4 J902
5
6 4
7 3
2
CON7
1
CON4
S901 S902 S903
GNDP SGND SGND