Dell 2209WA Service Manual page 14

Service Manual
R835
VDD
20K
1/4W
Q953
PMBT2907A
2 3
R836
20K
1/4W
+5V_PI
R940
20K 1% R942
0402
R941
470
10K
I952 R943
4 1
1K 1%
3 2
LTV817M
Q860
R898
HIGH ON
1
5 PWR24V_ON
10K 0402 RK7002
R897
C897
1uF/10V 1M
0402
D850 is a rectifier in which there are 4 build-in diodes, inverting AC to
DC.
C854 is used to smooth the wave from rectifier. R870 is PFC current
sense Resistor. FR850,FR851,FR950 are fuse resistors to protect the
D858 1N4007
D859 1N4007
D850
GBU8-06
L853
- +
4 1
C874
1uF/450V
EMI Shield
R871
1M2
R870
1/4W 1/4W
0.22R/3W 1% R872
1M2
1/4W 1/4W
C887 C888
1000p/400V 1000p/400V R873
Y1 Y1
1M2
1/4W
R874
1M2
C812 1uF/50V 1/4W
U850
SG6901A
R813
1
VRMS IAC
68K
Signal GND R814
2
RI VEA
24K 1%
C819 100p/50V 0402
3
OTP FBPFC
C813 4700p/50V 0402
C814
R816 4
IEA OVP
1K 1% 1000p/50V
R817 0402 0402
5
IPFC RANGE
2K7 1%
0402 C815 Open 0402
6
IMP VDD
R818 2K7 1% 0402
R819 Open 7
ISENSE OPFC
0402
R824
8
FBPWM GND
100 1%
C820
4700p/50V
0402 9
IPWM OPWM
C821
Signal GND 2200p/50V
0402 10
AGND
R829 R825
10.5K 1% 200 1%
Signal GND
VDD
FR950
VBUS
0.2R 1W
R837 R838 R839
20K 1/4W 20K 1/4W 20K 1/4W
Q951
D953 MMBT4401
2 3
1N4148
C956 + R953
C957
0.01/50V 10u/50V
10K
ZD951
GDZ20B 20V
Q950
2SK3265
R956
8 5 1
HV GATE
47R
R951
U950
10K
7 1
NC RT
R958
LD7575
100K 1%
R957
2 3
FB SNESE
470R
C954
C953
1000p/50V 470p/50V
0402
Fig.6
13
D856
RT851
IN5406
SCK053
D860
L855 L856 L857
2 2 1 1 2
Bead Bead Bead
FR851 600V/8A
0.2R 1W
Q853 C882
1 100p/1KV
R831 FQPF12N60C
R885
300K
10K
1/4W
R832 R984
300K
1/4W
499K
R875 1/4W
R988
R833 20
1/4W
300K 499K
1/4W 1/4W
R834 R989
C811
300K 4700p/50V 15.8K 1%
1/4W
Signal GND Signal GND
20
C818 10uF/25V
19
Signal GND
18
R822
R821 C817
17 46.4K 4700p/50V 24K 1%
16 VDD
Signal GND
15
R858
C822
10K
1uF/50V
14
13
12
11
SS
C816
0.01/50V
Signal GND
C955
4700p/400V
T900
SPW-129 PQ2620
D951 .
1 7
FR10-10-LF
3
9
8
D952
ER104
12
5 11
C952 C951 10
.
47uF/50V 104p/50V
6
.
C860
2200p/400V
C958
100p/1KV
I950
4 1
3 2
LTV817M
R959
0R51 2W
L858 FR850
VBUS
1 2 1
Bead 0.2R 1W
C867 C868 R855
2.2nF/1KV 2.2nF/1KV 75K 3W
+ C854
120u/450V
R981 R985
499K 499K D851
1/4W 1/4W FR30-10-LF
R982 R986
499K 499K
1/4W 1/4W
R983 1
L859
499K Bead
1/4W
R987
2
499K
1/4W
Q850
SPA11N80C3
1
R886
10K
R854
20
R853
1/4W
0.12R 2W
C855 ZD851
10nF/400V P6KE350A
C881
100p/1KV
I850
4 1
3 2
LTV817M