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Equipment Repairs => LCD TV forum => Topic started by: kodie on March 19, 2015,13:52:26

Title: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: kodie on March 19, 2015,13:52:26
My tv has a problem with resistor 1.8 ohm in psu keeps blowing
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: Turnip on March 20, 2015,12:40:22
Hi Kodie,

Suspect the input PFC FET is S/C and drive chip probably duff (without any more info) Had it been the bridge rectifier the mains fuse would have blown.
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: kodie on March 20, 2015,19:50:06
Quote from: Turnip on March 20, 2015,12:40:22
Hi Kodie,

Suspect the input PFC FET is S/C and drive chip probably duff (without any more info) Had it been the bridge rectifier the mains fuse would have blown.

Thanks turnip, I will try, yes if the main fuse is blown I suspect the bridge rectifier, but this is the resistor, maybe a diode or transistor that drive the relay.
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: Turnip on March 21, 2015,13:11:11
Hi Kodie,

Need more information to have any sensible idea - panels maybe, genuine Toshiba or Vestel ?  - Chris
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: jordan on March 22, 2015,04:45:29
42rv530u
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: kodie on March 22, 2015,10:03:24
Quote from: jordan on March 22, 2015,04:45:29
42rv530u

I was reading the pdf, but no schematic diagram. Thanks Jordan. I bought  the same pdf, bought lcd/led repair tips on eBay. No idea about this 1.8 ohm resistor
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: Turnip on March 22, 2015,12:40:33
Hi Kodie,

Cheap Toshiba mostly Vestel. Might be useful if you give panel details, as Toshiba doesn't seem to in the download for some reason - Chris.
Title: Re: Toshiba 42rv530u, fuse resistor keeps blowing
Post by: watteau on March 24, 2015,10:29:57
Hi,
Check these power-supply circuits: