Toshiba 42rv530u psu, keeps blowing fuse resistor

[Rome]

https://www.badcaps.net/forum/attach...7&d=1400080869

I have a power supply like this in my attachment, I found a bad resistor ( circle in red) w/c is 1.8 ohms fuse resistor. I replaced with new resistor & it blows again. So what's the problem, it's the rectifier diode or the relay.

[budm]

Re: Toshiba 42rv530u psu, keeps blowing fuse resistor

I did not look at the SCH in details yet to see what the resistor is for. There are two revision of the SCH, REV1 and REV2.
http://elektrotanya.com/?q=showresul...oria=&kat2=all

[Rome]

Re: Toshiba 42rv530u psu, keeps blowing fuse resistor

I did not look at the SCH in details yet to see what the resistor is for. There are two revision of the SCH, REV1 and REV2.
http://elektrotanya.com/?q=showresul...oria=&kat2=all

Thanks budm, I will try

[Rome]

Re: Toshiba 42rv530u psu, keeps blowing fuse resistor

Budm, I look at the diagram, check mosfets 820 & replaced the power IC q840 ( str-A6169). BTW I replaced also the resistor r850 & relay 81 when I plug the TV, the resistor r850 blown again. I don't know what my next idea.

[stj]

Re: Toshiba 42rv530u psu, keeps blowing fuse resistor

is yours the rev1 or 2 ?

[loonytu]

Re: Toshiba 42rv530u psu, keeps blowing fuse resistor

hi im having the same issue how do I tell if I have rev1 or 2

[rickou]

Re: Toshiba 42rv530u psu, keeps blowing fuse resistor

So have you try put a lamp ohmic +-100w in série with your phase that supply for your PS if the lamp goes on and stay on you have a short, let on for a couple of minute s and look for what is getting hot. If nothing get hot check the snubber circuit.