Power Board - AOC envision L37W431 Service Manual

37'' LCD TV

9.2 Power Board

715T1852-3
VCC2
!
D901
1N5406
L907
C974
Y G972S6R
0.01UF/1KV
C911
1uF/450V
! R907
R903 68K 1/10W
620K 1/8W
L903 VCC2
!
120uH R904
620K 1/8W IC901
FA5500AN
C910
+
1uF/450V R905 C913
0 1/8W C914 22uF/50V
! 0.1uF
BD904
+
4 - 1
!
D25XB60
R906 C915
11K 1/10W 1% 0.01uF
FB904
BEAD C916
220pF
D111
2 3
L911 R111 R112
!
BA159G 4.7M 1/8W 4.7M
1 4
C111
0.01UF/1KV
C908
0.47uF/250V
!
C902 C905 B+
680PF/250V 680PF/250V
! !
2 3
L902
!
R965
1 4
VCC1 10K
C909
0.47uF/250V
!
C912
0.1uF/50V
IC905
LD7575
2 3 LD7575
7
N.C
L901
1
RT
1 4
R974
R900 R902 100K 1/10W
330K 1/8W 330K 1/8W
!
!
! !
!
R901 330K 1/8W
C903 RV901 C904
1000PF/250V Varistor 1000PF/250V
!
F901
! !
5A/250V
!
CN901
3P/3.96mm
Q910
J916
2 3
PMBS3906 100 1/6W
1K 1/8W
R960
R955 470 1/8W
10K 1/8W
R922
RLZ15B
R920
100K 1/8W
1 Q903
PMBS3904
D904
UF4003PT C920 C919
+
22uF/50V 0.1uF B+
NR901
1 2
FB903
D902 SCK055 BEAD
C906
+
C907 120uF/450V C921 C985
+
FB905 120uF/450V
0.01UF/1KV 0.01UF/1KV
BEAD
R915
330K 1/8W
R908 D903
0 1/10W LL4148WP
!
R909
22 1/10W Q901
R949
20K 1/10W ZD901
FET FCA20N60 FAIRCHILD RLZ18B
R910
IC902 VCC3
20K 1/10W R916
330K 1/8W 1 8
Demag HV
2 7
FB N.C
R911
330 3 6
CS Vcc
C926 4 5
GND Drv
R918 R912 R917 470PF
NC 0.3 /3W 330K 1/8W
NCP1377
C925
C918 0.1uF
330PF/50V
R938
18K 1/10W 1% R967
R914 270K 1/10W
10K 1/10W R919
10K 1/10W 1%
C927
1500PF
IC111
C917
0.47uF/25V 1 4
OUT GND
2 3
VIN N.C
R113 NCP305
1/8W 4.7M 1/8W
C112
0.1uF
R114 BD901 H.S.
330K 1/8W
R983 C957
47 1/2W 0.001uF/500V
D924
FME-220B
FB902
BEAD T903 2
6
12
O
11
R971
100K 2W R984 C958
C950
47 1/2W 0.001uF/500V
1500pF/1KV
O 10
1/8W D900
BA159GPT
D916 4 8
UF4003PT 7
2 2
C951 R973 D921
+
22uF/50V 2R2 1/8W O 9 N.C FMW-2156
ZD904 1 O
27Vz
D920
LL4148WP
R976
Q900
5 1 STP8NK80ZFP
OUT
3 10 1/8W
CS
R977 R997
10K 1/10W 470 1/4W
ZD921 ZD922
RLZ13B RLZ5.1B
R979
1K 1/10W
C952 R978
220pF/50V 0.56 /3W D915
LL4148WP D917
LL4148WP
C953
470PF/25V R923
IC904 1K 1/10W
PC123FY 2 4P
D911 R921
N.C LL4148WP 1K
C966
0.1uF/50V
C954 R981
0.1uF/50V 100K 1/10W R932
1K 1/4W
IC911
KIA431
!
1 Q904
PMBS3904
C901
1000PF/250V
ZD906
VCC3
NCP1377 VCC C900
330PF/250V
13.8 ON
C930
20V籹祘
!
2200PF/1KV
FB901 T901
BEAD
1 7
FME-220B
C929 10
0.01UF/1KV
R925 11
47K 3W
FME-220B
C922
D906 D907
2200PF/1KV
BA159G BA159G 3 12
R926
5
20K 1/10W
9
!
C923 R927 6 8
100PF 10K 1/10W
D908
LL4148WP
R928
22 1/10W Q902
2SK3679
FME-220B
C938 R939
!
C924 + C973 ZD910 R929
RLZ18B
0.1uF 20K 1/10W 1000PF/1KV
47uF/50V R935
20K 1/10W
R930
100 1/10W
R931
0.33 3W
R941
470 1/6W
C969
4700PF
R942
+12VP
2K 1/10W
IC910
PC123FY 2 4P
L921 L
0 1/10W
C943
R943
C959 C960
+ + +
1000uF/25V 1000uF/25V C972 ZD920
PTZ9.1B 0.1uF
1000UF/25V
L922 L IC921
KIA431
+ C962 + C956 +
1000uF/25V 1000uF/25V
C963
470UF/25V
R975
220 2W
VCC1
VCC2
Q914
2 3
PMBS3906
R966
1K 1/10W
R985
10K 1/8W
R934
33K 1/10W 1% IC912
PC123FY 2 4P
R998
10K 1/10W R999
3.6K 1/10W 1%
!
1/10W
C965
0.1uF/50V
R924
1K 1/10W
R933
2.4K 1/10W 1%
52
24VI
R940
22 /2W
L905
RJ901
1
C931 C932 3.5UH C935
+ + +
D931 1000uF/35V C934 470uF/35V
+ +
1000uF/35V C933 1000uF/35V
1000uF/35V
D932
R950
1K 1/16W
IC931
5
Vcc
FP130
+18VI
D910
L906
F902
47 /1W 3.5UH R30-250(30V/2.5A)
R913
!
C939 C941 1K1W
+ +
470uF/35V
1000uF/35V
+5VP
R989
JUMPER
10K 1/10W
R944
R990
75K 1/10W 1% ZD905
RLZ24B(22.61~23.77V)
C944
0.1uF
ZD903
MTZJ27B(24.97~26.26V)
R946
15K 1/10W 1%
R945
D913 D918
LL4148WP LL4148WP
0 1/10W
R947
1.5K 1/10W 1%
S_PROTECTION
F903
0
Q907
+12VP
AO4411
1 8
S1 D1
2 7
S1 D1
R987 3 6 C961
S1 D1
4 5
G1 D1
33K 1/10W 0.1uF
S_PROTECTION
R986 R991
1K 1/10W 2K 1/8W
R994
1.5K 1/10W
SCR901
2N5060 2
Q915
R988
PMBS3904
1
1K 1/10W
C964
0.1uF
R993
Q923 1 C967 R995
PMBS3904 1uF 1K 1/10W
1K 1/10W
C968 R992
0.1uF 2K 1/8W
Envision L37W431
FOR BACKLIGHT
24V
24V/5.7A
CN921
1
2 2
3
8m C942 4
1000pF 5
6
C936 7
0.1uF 8
9
10
11
R951 12
1K 1/16W R952 13
1K 1/16W 14
Q921 14P/2.0mm
PMBS3904
R953
CN922
1 1K 1/16W
out
FB906 1
BEAD 2
R954 C970 3
24K 1/10W 0.1uF 4
5
6
7
D923 C940 8
1N4148 9
0.01uF
10
+18V
10P/2.0mm
S_PROTECTION
+12VP CN923
1
2
3
4
5
6
7
8
9
10
11
PS
12
C945 C946 C947
0.1uF 0.1uF 0.1uF
12P/2.0mm
1/8W
PS
Thursday, September 07, 2006
Title
POWER OUT 5V&12V&18V&24V
Size Document Number Rev
3
T1852-3-X-X-2-060830
Date: Sheet 1 of 1