I need help with a vizio v0420e power board # PLHL-T802A
The main fuse was blown
after the fuse was replaced I had a very bright light when using a 25 watt lamp in series with the ac input
I replaced a shorted mos fet a K13a600 after which the lamp was no longer lit
when powered up normally the main dc voltage was 186 VDC
The stand by voltage was 1.2 volts should be 5vdc
all other voltages were o
I removed and tested all electrolytic caps ESR and value
Tested all thru hole Fets
Tested all diodes including the zener diodes
Was unable to find any data on u501 part # DK19B I think that this a regulator
The voltage across ZD105 an smd zener is .141mv in circuit and the correct value 16vdc when removed
The main fuse was blown
after the fuse was replaced I had a very bright light when using a 25 watt lamp in series with the ac input
I replaced a shorted mos fet a K13a600 after which the lamp was no longer lit
when powered up normally the main dc voltage was 186 VDC
The stand by voltage was 1.2 volts should be 5vdc
all other voltages were o
I removed and tested all electrolytic caps ESR and value
Tested all thru hole Fets
Tested all diodes including the zener diodes
Was unable to find any data on u501 part # DK19B I think that this a regulator
The voltage across ZD105 an smd zener is .141mv in circuit and the correct value 16vdc when removed
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