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8
TROUBLESHOOTING GUIDE
1. NO POWER
Appendix
Drain
76
I801 MR2520
54321
Vin
Vcc
GND
F / B
Z / C
Source
/OCL
FB01
L801
R801
C810
C811
D883D884
D882 D881
125V 4A
++
+
+
L805
C820
C814
R814
R813
R822
C818
D804
R821
C819
OCP
+133V
+45V
+12V
(Sound)
+5V
(St-By)
Q871
R827
Q873
R877
(Micom Power on/off)
PWR on : H
PWR off : L
R875
R873
R824
D806
D805
4
5678
321
D871
I803
R868
I806
LTV817
I804
LTV827
I805
LTV817
D811
C891
C892
C807
R805
D810
R892
R891
L811
C809
Check
Waveform
#6
#5
+
#11
#10
+12V
C871
R872
R869
R879R870
R878
C812
R819
R817
Q805
C876
D812
+
D813
C832
C815
+
+
D841
C841
D824
D807
L807
C813
+133V
#4
#3
#2
R807
C804
+
T801
TSM-3541T8
L841
+45V
+13.5V
#9
#14
#12
#13
C893
R874
R826
Q806
+5V
(H Vcc)
R876
Check
F801(125V/4A)
Check
F801(7W, 2.2)
Check
Voltage
Check
voltage
Check
Voltage
Check
Voltage