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Service Manual ASUS VW224U&VW224S
4.2.2 Inverter/Power Board
AC input Bridge Rectifier
Rectifier Transformer diodes
EMI filter
and Filter
Start Circuit: R904, R932, R933
CN902
5V
Feedback
PWM
Control IC Circuit
12V
ON/OFF
Output Transformer MOSFET
Circuit
ON/OFF
Lamp Feedback Control
PWM
Circuit
Control IC
DIM
Over Voltage IC801
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Service Manual ASUS VW224U&VW224S
5.2 Power Board
715G2538-1-ACE
100 1/4W R918 F902
0R05 1/4W
1K 1/4W 1K 1/4W 1K 1/4W 1K 1/4W
+14V
100 1/4W R919 L904
C912 1.1uH
0.001uF ZD902
R923
R928
100 1/4W R920 C917 RLZ16B
R921
R922
+ + C918 +
680uF25V 680uF25V C922
2
2
NC R929
T901 1 3 1K 1/8W
ZD901
4 9 D906 NC
100K 2W
SP10100 Q902
R908
1
BD901
1
KBP208G R904 R905 C906 PMBS3904 R936
4K7 1/4W NC 1500pF 2KV 5 7 R935 100 1/4W 3 1 C910 NC
+
C938 + C905 0.001uF
2 3 1500pF 2KV 120uF/450V D905
C929 SB1060FCT R967
2
6 11 R961 100 1/4W 0.001uF 0R05 1/4W
R932 R906 D900 4
+5V
-
4K7 1/4W NC PR1007R 10 L903
1.1uH
! VCC D901 R909 R962 100 1/4W
4
PS102R 10R 1/4W 6 + C915
1 8 470uF16V C916
C904 0.1uF
1
0.22uF/275V C908 + R940
C907 22uF/50V R933 R907 D907 33K 1/10W
R924
0.1uF 4K7 1/4W NC FB901 3 12 NC + C939
BEAD 1000uF25V 1K5 1/10W
POWER X'FMR
1 8 D903
! 2 Vcc DRAIN 7 BAW56DIODES
2
GND HVS
2
2
C902
0.001uF/250V
C901
0.001uF/250V
3
4 PROTECT DRIVER
CTRL SENSE
6
5
Q901
! ZD921 ZD922
R927
3.6K 1% 1/10W
RLZ16B RLZ5.1B
4
1
STP10NK70ZFP
IC901 R910 IC903 R925
TEA1530AT 10R 1/4W R938 PC123X2Y FZOF 1K 1/10W 1%
1
1
FG R917 10K 1/8W
1K 1/8W
3
2
C911 R912 D915 D916
R915 22K 1% 1/8W C924 LL4148WP LL4148WP
0.22uF/25V 220K 1/8W 0.1uF/25V
L901
1 2 R913 C909 R914
R911 NC 0.22uF/50V 0.22 2W
1K 1/8W R926 R942
4 3
! IC904
KIA431A-AT/P
3.6K 1% 1/10W 1K 1/10W 1%
R916
26mH 4K7 1/8W
R930
2.4K 1% 1/10W
9
R931 C928 C921 8
8K2 1/8W 0.0012uF 0.0047UF/400V 7
+5V
C903 6
0.47uF/275V 5
+12V
4 CN902
3 WIRE HARNESS
R903 R902 R901 HS1 HS4 2
510K 1/4W 510K 1/4W 510K 1/4W HEAT SINK(D906) 090G6276 1 C931 C930 1
1 1 0.1uF 0.1uF
2 2
VAR901
DIM
NC HS3 GND1
NR901 HEAT SINK(Q901) GND
NTCR
t F901
4.0A/250V 1
2
1
2
ON/OFF
FUSE ! FG
FG
3
2 1
TPV ( Top Victory Electronics Co . , Ltd. ) OEM MODEL 20/22'LCD Size B
CN901 G2538-4-X-X-35-080716 TPV MODEL PWPC8C42MQF1 Rev 4
SOCKET Key Component 02.POWER PCB NAME 715G2538 1 ACE
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Date Wednesday , July 16, 2008 Sheet 2 of 3
28
Service Manual ASUS VW224U&VW224S
2
2 1
T801 E
POWER X'FMR 3 D805 R817 R821
1 8 C BAW56 10K 1/10W 1K 1/10W 1% CN801
R855 1 CONN
15 1/4W C839 B 2
F801 1500pF C819
0R05 1/4W 4 3
3 0.0022uF
+12V
C801 1
10pF/6KV
+ C802 C824 R801 D801
3.6K 1/10W 470UF/25V 0.1uF R856 7 9 1K 1/10W 1% BAV99
R819
R804 15 1/4W
100 1/8W Q802
Q801 P5506
PMBS3904 4 5
G D
Q808 3 6 2
PDTA144WK R839 S D C838 1
Q805 2 7 1500pF
PDTC144WK Q804 G D R828 R822
0 1/8W
2
PMBS3906 1 8 10K 1/10W 1K 1/10W 1% CN802
ON/OFF S D
1 CONN
2
R823
C807 C823
0.1uF/25V 3.6K 1/8W T802 3
3
POWER X'FMR 0.0022uF
R857 1 8 1
Q811 15 1/4WC840
PMBS3904 1500pF R814 D802
1K 1/10W 1% BAV99
4
3 C811
R850 10pF/6KV
+ C803
0 1/8W 470UF/25V C805
Q812 R858 7 9 2
2
PMBS3906 0.1uF 15 1/4W 2 1
1 E
DIM
3 D808 R833 R809
C BAW56 10K 1/10W 1K 1/10W 1% CN803
Q803 1 CONN
3
P5506 B 2
4 5 C841 C815
R827 G D 1500pF 3
01/10W 3 6 0.0022uF
S D 1
2 7
G D R815 D803
1 8 1K 1/10W 1% BAV99
S D
Q806 R853
PMBS3904 68K 1% 1/10W
2
1
R834 R812
10K 1/10W 1K 1/10W 1% CN804
C835 CONN
NC R808 R813 2
10K 1/10W 10K 1/10W 1% C816
3
D817 0.0022uF
LL4148WP 1
Q810
RK7002 R816 D804
1K 1/10W 1% BAV99
R811
2.7K 1% 1/10W
D809
LL4148WP
R841
68K 1% 1/10W
R851 R829
R802 C842 22R 1/8W
NC 0.01uF
13 KOHM +-1% 1/10W
R825
22R 1/8W
R837
47K 1/8W
C822 R832 R806
1uF/25V 10K 1/10W 68K 1% 1/10W D814
IC801 LL4148WP
1 16
2 IN1+ IN2+ 15
D812 IN1- IN2-
3 14
4 FB VREF 13 R818 D806
5 DTC CONT 12 1K 1/10W 1% LL4148WP
6 CT VCC 11
0 OHM +-5% 1/4W 7 RT C2 10
8 GND E2 9
C821 C1 E1
0.1uF/25V TL494
R861
R810 270K 1% 1/10W R854
51K 1/8W 68K 1% 1/10W Q809
R803 RK7002
Q807 R807 1M 1/10W 5%
PMBS3904 47K 1/10W
C825
R820 R863 R831 C820 R805 R824 0.1uF/25V C846
47K 1/10W NC 2.4K 1% 1/10W 220pF NC R826 1K 1/10W 1% NC
1K 1/10W 1% C834 R835
C817 C845 R862 0.1uF/25V 1M 1/10W 5%
NC 2.2uF/16V 1M 1/10W 5%
T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL 20'&22 LCD Size Custom
G2538-4-X-X-35-080716 TPV MODEL PWPC8C42MQF1 Rev 4
Key Component 03.INVERTER PCB NAME 715G2538 1 ACE
<>
Date Thursday , July 17, 2008 Sheet 3 of 3
29
Service Manual ASUS VW224U&VW224S
6.2 Power Board
715G2538-1-ACE
35
Service Manual ASUS VW224U&VW224S
36
Service Manual ASUS VW224U&VW224S
11.2 Power/Inverter Board
1.) No power
Check CN902 pin4, 5 = 12V
NG
Check AC line volt 110V or 220V
OK NG
Check AC input
Check the voltage of C905 (+)
OK NG
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin8 of IC901
NG
OK Check R904, R932, R933 and Change IC901
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK NG 1) Check IC901
2) Check R909, D901 circuit
Check IC901 pin6 PWM wave
OK
NG
Check IC901
Check Q901, IC903, IC904, D915, D916, ZD921, ZD922
76
Service Manual ASUS VW224U&VW224S
2.) W / LED, No Backlight
Check CN902 pin4, 5 = 12V
OK NG
Check adapter or MB
Check ON/OFF signal
OK NG
Check Interface board
Check IC801 PIN12=12V
OK