Power Board - HP LP2275w Service Manual

22" LCD Color Monitor

7.2 Power Board

R901
!
680KOHM +-5% 1/4W
!
BD901
R902
680KOHM +-5% 1/4W L902 4 -
!
10MH
KBJ608G
R903 1uF/450V
680KOHM +-5% 1/4W
!
C902
NC
L901
!
13.0mH
C901
0.47uF/275V !
Add C904 and C905 for
! version B !
C904 C905
0.001uF/250V
0.001uF/250V
!
RV901
NR901
!
Varistor
NTCR
! !
R919
C909 C908 1M OHM 1% 1/4W
100PF/250V 1000PF/250V
!
F901
FUSE
CN901
R920
SW901
1M OHM 1% 1/4W
2 1 1 2
!
!
SW
SOCKET R921
1M OHM 1% 1/4W
R922
240K OHM 1% 1/8W
C906
0.001uF/250V
!
C981
NC
!
C982
0.001uF/250V
!
C903
0.001uF/250V
!
HS1 for
BD901:
90G6064-1
HS3 for D901:
90G6084-1
Modify L903 value 120uH to 200uH for
version B
L903
FMX-G26S
+
1 L904
200uH
C911 C912
1uF/450V
408uH
!
HS2 for Q901 :
90G6084-1
R908 220K OHM 1/8W
D903
!
R909 15K OHM 1/8W LL4148
R938
Q901
2R2 1/8W
R912 14A 600V
10R 1/8W R913
470R 1/8W
5 4
ZCD CS
6 3 Modify R9101 value
GND MOT
7 2
0.18 to 0.1 for
OUT COMP
8 1
version B
VCC INV
R9101
0.1 OHM 2W
C915 C917
56pF IC901
FAN7529MX 1NF 50V
!
Vcc1
R907 C910
56K OHM 1/8W C916 R911
NC 10K 1/8W
1NF 50V
C918 C919
0.047uF 0.33uF/50V
R924 R925
150K 1/4W
150K 1/4W
Vcc2
D902
BNO
LL4148
R923
C907 150K 1/8W
1uF
B+
Modify C914 value 120uF to 100uF for
D901 version B
R905
400V
0.1 ohm
C914 C923
+
100uF/450V
C913 C929 2200PF 500V
10nF 10nF
!
C935
2200PF 500V
R948
C922 1K 1/8W
R914 COMP BNO 0.01uF
D904
680K OHM +-1% 1/4W
LL4148
IC902
LD7522PS
1 8 R927
BNO OVP R931
R915 2 7 22R 1/8W
COMP VCC 2R2 1/8W
3 6
(-)LATCH OUT
680K OHM +-1% 1/4W 4 5
CS GND
R928
10K 1/8W
R929
C920
470R 1/8W
0.01uF R930
R916
51K 1/8W
Delete R9111 and R9118 for version B
680K OHM +-1% 1/4W
C921
220PF/25V
R9113
1.5 OHM +-5% 1/4W
R917
13K 1/8W R918
NC
R932
10K 1/8W
D905
R926
LL4148
150K 1/4W
C924 + C925
0.1uF/50V 10uF/50V
Vcc1
Q903 R939
100 OHM +-5% 1/4W
PMBS3906
Q904
+ C936 PMBS3904
47uF/50V
R936
1K 1/8W
R937
1K 1/8W
+
R935
10K 1/8W
31
!
NC
T902
C953
R9109 100K OHM 1/4W
POWER X'FMR
1
100K OHM 1/4W 7 R952
8
NC
R9110 2 9
10
11 R953
NC
R9111 3
100K OHM 1/4W 6
12
R9112
HS5 for
100K OHM 1/4W
D906 5 D951:
90T426501
PR1007R
GP
2
!
D951
Q902 DIODE Y A868C06RSC 30A/60V TO-220
10A 700V
HS4 for Q902:
90G6084-1
R9114
1.5 OHM +-5% 1/4W
!
+5V
COMP
D907 R933
US1D-E3/61T 4.7 OHM +-5% 1/4W R964
470 OHM +-5% 1/8W
Modify R954 value 1K to 2.2K for version B
!
+ C926
47uF/50V R954
IC950 2.2KOHM +-5% 1/8W
PC123X2Y FZOF
C958
0.1uF
R934 C959
R957
4.7 OHM +-5% 1/4W 0.1uF
D908
10K 1/8W
US1D-E3/61T
3
IC953
TL431ACZ-AP
C927 R960
47uF/50V 150KOHM +-1% 1/8W
Add R960 for version B
+5V1
R962
1K 1/8W
!
IC951
PC123X2Y FZOF
Add R965 for version B
R965
NC
Q951
PMBS3904
ZD901 C962 R963
10K 1/8W
RLZ15B
0.1uF/25V
HP LP2275w
Add C954 for version B
C954
NC
+5V1
L951
C955 3uH C957
470uF/16V
1000uF/35V
+5V
C961
R966
+ + 0.1uF
+ C956
1000uF/35V NC
Add R966 for version B
+5V
R959
10KOHM +-1% 1/8W
R961
10KOHM +-1% 1/8W
PS_ON