Power Board - HP L1740 Service Manual

17" LCD Color Monitor

7.2 Power Board

Philips HPL1940T/L1740
PCB : 715G1821-1/715G1995-1
VDD
R804
10K
R803
2 1
10K/NC
R801
10K Q801
2 1 1 2N7002
BRIGHTNESS
R802
100K C830
1000pF/NC
R806
100K/NC
PANEL_ID
R871
2 1
BL_CTL
10K 1/2W
R872
100K
VDD
C811
1uF
1/10W
R815
R811
30K
3M3
U811
1 16
DRV1 PGND
2 15
VDDA DRV2
3 14
TIMER GNDA
4 13
DIM CT
5 12
ISEN SSTCMP
C826
6 11
VSEN LCT
IC901
0.01uF/NC
7 10
OVPT ENA
8 9 C812
NC1 NC2
R812
R816 0.1uF
620K
OZ9938GN
20K
C831
C846 C832
0.33uF
1uF 0.1uF
VDD
R807
2 1
10K
R819
C819
1M
0.01uF/25V
R861
PANEL_ID 2 1 Isen
100K_1%
+12VCC
2 Q873
PDTA144EU
Q871
1 2N7002 R874
R873 330 1/10W
TPV 2n7002
2K 1/10W
C871
0.1uF_NC
1 Q874
2N3904
ZD874
VDD
RLZ5.6B
C874
1uF
PT801
1
2 7
+12VCC
3
4
C820 C821 R822 R823 5 8
470uF/25V 1uF 10R 10R 6
24:24:2400
C822 C823
0.001uF 0.001uF
R813
33K_1%
Q821
1 8
S1 D1
2 7
G1 D1
3 6
S2 D2
4 5
G2 D2
AM9945N
PT802
1
C813
2 7
560pF
3
+12VCC
C847 4
0.022uF/25V
C840 C841 5 8
1uF
470uF/25V 6
R842 R843
24:24:2400
10R 10R
C842
C843
0.001uF
0.001uF
Q841
1 8
S1 D1
2 7
G1 D1
3 6
S2 D2
4 5
G2 D2
AM9945N
R863
2 1
33K 1/4W
VDD
Isen
R880
10K 1/10W
Q880
2N7002 1
C880
0.1uF/25V
Q881
2N7002 1 2
1K
R881
C881
0.01uF 100K 1/10W
Q883
2N7002 1 2
1K
R883
C883
100K 1/10W
0.01uF
Q885
2N7002 1 2
1K
R885
C885
100K 1/10W
0.01uF
Q886
2N7002 1 2
1K
R887
C887
100K 1/10W
0.01uF
18
C802
3PF 3KV R834
6.2M 1/2W_NC
C803
C801
JUMP
R835
10pF/6KV 1 2
10K_1%
R824
C838
7.5K_1%_NC
1000pF R836
10K_1%
D833
BAV70/SOT23B
2
R837 C860
7.5K_1% 3
220pF
R829
1
0 1/10W
R830
C805
R839
10K_1%_NC
5pF/3KV_NC
6.2M 1/2W
C804
5pF/3KV_NC
C807
R854
3PF 3KV
C806
6.2M_NC D853
10pF/6KV C808
BAV70/SOT23B
JUMP R855
1
10K_1% 3
R857
R856
C861 2
7.5K_NC 10K_1%
1000pF
R825
C858
7.5K_1%
390pF
R849
1 2
0 1/10W
R850
10K_NC
R859
6.2M 1/2W
D881
R882
OP1
1
1/10W
IN4148
D883
R884
OP2
1
1/10W
IN4148
D885
R886
1 OP3
1/10W
IN4148
D887
R888
OP4
1
1/10W
IN4148
HP L1740
1
CN831
OP1 2
CONN
R831
1K
D831
BAV99
R833
1.2K
OP2
2
CN833
1
CONN
1
CN851
OP3 2
CONN
R851
1K
D851
BAV99
R853
1.2K
OP4
2
CN853
1
CONN
R865 R866
C865
232R 100K/NC
33nF