NAD CI980, Service Manual, Page: 17 / 35

1 9
7.PSU BOARD
NTC901
SCK255R0MSBY
C 927
1nF
R959
2.7K
R921
100K
R906
47K
C921
220nF/25V
R 976
0R22
R 977
0R22
GNDP
R 946
1.2K
R 908
5.1K
Q913
FDP18N50
Q912
FDP18N50
Q906
BC807-25
R929
10R
G N D P
C919
1.2nF/200V
R952
12R/1206
C920
1.2nF/200V
R953
12R/1206
SGND
2
1
3
4
BR901
25A/1000V
C910
1UF
C916
150P/200V
R978
22R
A
C
12
0V
/2
30
v±
10
%
C911
150P/200V
R951
22R
M
A
IN
I
N
ZV901
14D471K
CX902
470nF/275VAC
R909
10K
C945
10nF/1000V
CX901
1uF/275VAC
R999
1M
R998
1M
R99
7
1M
1
2
4
3
L910
1.9mH
1
2
4
3
L909
1.9mH
C902
200V/680UF
C903
200V/680UF
R918
100K
R919
100K
R920
100K
R917
100K
GNDP
L901
22uH/6A
C917
470nF/275VAC
C918
470nF/275VAC
Q 923
BC846BW
D907
BAS316
Q918
BC846BW
Q921
BC846BW
OC
C908
10nF/1KV
C909
10nF/1KV
D909
BAS316
D910
BAS316
D911
BAS316
Q927
BC856BW
Q926
BC856BW
R963
10K
R922
100K
R973
4K7
R964
47K
R915
1M
R914
1M
R926
100K
R923
100K
R924
100K
R913
220K
R925
100K
R962
47K
Q922
BC846BW
Q919
BC846BW
Q920
BC846BW
GNDP
GNDP
1IN+
1
1IN-
2
2IN-
15
2IN+
16
FB
3
DTC
4
C
T
5
R
T
6
G
N
D
7
C1
8
E1
9
E2
10
C2
11
V
C
C
12
O
P
CT
L
13
R
E
F
14
U904
TL494
Q928
BC856BW
R967
47K
R907
10K
R960
2.2K
R974
1.2K
R966
47K
R944
1K
R965
47K
C924
1n/50V
C926
470P
C925
2.2uF/25V
R975
18K
GNDP
GNDP
R928
10R
R943
1K
C907
1u/25V
GNDP
R935
10R
Q903
BC807-16
Q902
BC807-16
Q904
BC817
D901
BAT54J
D902
BAT54J
D904
BAT54J
R936
1K
GNDP GNDP
Q905
BC817
D903
BAT54J
R937
1K
C904
1U/25V
GNDP
R938
1K
CY901
1nF
R989
100R
R991
2K
C953
104
R990
10k
2
3
1
U911
TL431
D918
UF4006
D919
Comment: BAS3
1
6
R988
1k
R985
22k
C949
10uF/50V
R969
2K
C956
104
C952
104
C951
1nF/200V
C954
1000uF/10V
C955
1000uF/10V
L904 3.3uH
+5VS
+5VR
R987 82R
HV
2
1
3
4
BD901
0.8A600V
C947
104
BP
2
S
5
S
6
D
4
UV
1
S
7
S
8
U908
TNY284
R983
2M
R984
2M
C946
47uF/400V +5VR
R904
10K
R903
10K
R901
390K
R912
1M
R902
390K
C922
22uF/25V
D905
BAT54J
D906
BAT54J
2
3
1
IC901
TL431
VCC
1
2
3
4
8
U901A
LM393
GNDP
5
6
7
U901B
LM393
R905
10K
K901
HF115F-I
R995
100R
R996
100R
VCC
D922
M7A
GNDP
Q901
BT139X-600F
R911
150R
R910
150R
C901
10nF 500V
R916
1K
GNDP
VCC
VCC
VCC
1
2
T901B
TR
C906
1u/25V
C923
104
C905
1u/25V
OC
D908
BAS316
R972
10K
C961
100nF
STB
C963
100uF/35V
C960
100nF
R971
47K
R993
4.7K
R994
1K
VCC1
IN
1
2
OUT
3
GND
U906 L7812
VCC
C962
100uF/25V
C959
100nF
GNDP
C950
100UF/35V
D920
MURS120
VCC1
GNDP
T902
BAW56W
Q911
BC807-25
R930
10R
R945
1K
T903
BAW56W
Q914
AOT412
Q907
BC807-25
R931
10R
R939
1K
T904
BAW56W
Q916
AOT412
Q909
BC807-25
R933
10R
R941
1K
T906
BAW56W
Q915
AOT412
Q908
BC807-25
R932
10R
R940
1K
T905
BAW56W
Q917
AOT412
Q910
BC807-25
R934
10R
R942
1K
T907
BAW56W
C913
150P/200V
R957
22R
C912
150P/200V
C915
150P/200V
R958
22R
C914
150P/200V
D921
1N5822
V+
V-
1
2
3
J903
CON3-3.96
+5VS
U902
MOC3043
U910
PC817
U909
PC817
6 7
T901C
TR
4
5
T901A
TR
14
13
T901D
TR
9
10
T901E
TR
11
12
T901G
TR
10
8
T901F
TR
4
3
5
6 2
1
8
9
7
10
T909
EE16
F901
FUSE1
R981
10R
Q930
2SB647-D
C976
1uF/25V
D912
P6KE200
+5VS
C948
100pF/1kV
G N D P
GNDP
CY902
2.2nF
C936
220UF/35V
D914
MURA220T3
R980
1R/1206
R979
1R/1206
C933
1nF/200V
R954
12R/1206
C938
330UF/25V
SGND
C
942
1
04
IN
2
1
OUT
3
GN D
U907 MC7912
IN
1
2
OUT
3
GND
U905 L7812
+12VD
C940
220UF/35V
D916
MURA220T3
C935
1nF/200V
R956
12R/1206
C941
330UF/25V
SGND
C944
104
-12VD
D915
MURA220T3
R949
1R/1206
C934
1nF/200V
R950
12R/1206
C965
63V/470UF
C970
100nF/200V
C968
63V/470UF
C966
63V/470UF
L906
65R7A
L907
65R7A
C964
63V/470UF
C971
100nF/200V
C969
63V/470UF
C967
63V/470UF
L905
65R7A
L908
65R7A
SGND
SGND
VOUT-
VOUT+
V+
V-
S G N D
+1 2 V D
+5 V S
S G N D
S T B
V O U T -
V O U T +
S G N D
1
2
3
4
5
J904
CON5
1
2
3
4
J905
CON4
S G N D
VDR
-12VD
R986
10K
R982
47K
C977
20
0V
/6
80
U
F
C978
20
0V
/6
80
U
F
CSD
SGND
90
TH901
U903
PC817
Q931
BC846BW
GNDP1
GNDS
+5VS
CSD
2
1
3
4
BD902
0.8A600V
C929
100nF
GNDP
GNDP
C930
100nF
C931
100nF
GNDP
C932
100nF
1
2
3 16
14
15
8
10
12
11
9
13
18
17
T908
EC42
VOUT-
VOUT+
SGND
1
2
3
4
5
J902
CON5
SGND
VDR
1
2
3
4
J901
CON4
G N D S
R 970
0R22
C979
100nF
C958
100nF
S G N D
S G N D
1
2
3
J906
CON2
D923
18V, 3W
SGND
R992
47k
R927
100K
Ω
, 2W
D924
M7A
D925
12V0.5W
C957
10uF/50V
CY903
1nF
CY904
1nF
FG
C973
220UF/35V
D913
MURA220T3
R961
1R/1206
C972
1nF/200V
R968
12R/1206
C974
330UF/25V
C975
104
R900
1M
TH902
103AT
1
2
3
4
J907
CON4
IN
1
2
OUT
3
GND
U913 L7812
+12V
+12V
SGND1
SGND1
SGND1
S G N D
C937
220UF/35V
C939
23
0U
F/
25
V
C943
104
VOUT-
VDR
R947
47K
R93
1k
C928
10nF
Vi
1
Vo
2
g
3
V
d
4
U912 KA78R12
T910
BAW56W
Q924
BC856BW
R9
1
47k
C980
22
0n
F
Q925
BC856BW
R94
47k
C981
100nF
R92
1M
D926
BAS316
C982
1uF
R95
1M
C983
100nF
D 917
5.6V
R96
47k
Q932
BC846BW
R948
22k
R955
1R
GNDs
C984
0R
R97
0R
EARTH1
C985
0R
R98
0R
EARTH2
C986
0R
R99
0R
EARTH3
C987
104
SGND1 SGND
0 1
S903
GNDP SGND SGND
0 1
S901
0 1
S902