Westinghouse LTV-32W1 SMPS blown

[Wizard]

Main SMPS section of this board have 2 transistors, one of them is blown along with .1 ohm resistor fried (but can tell the original color bands).

Q301 and Q302, R2.

The pair of transistors is P20NM50FP.

Problem is our local supplier have this transistor here but there is other suitable MOSFET transistors if I can sub in. Care to show some good subs?

Cheers, Wizard

[kc8adu]

Re: Westinghouse LTV-32W1 SMPS blown

iirc this uses an sg6841 which has also died.
http://search.digikey.com/scripts/Dk...50FP&x=20&y=23
should be simple to sub this.dk has them in stock.

[Wizard]

Re: Westinghouse LTV-32W1 SMPS blown

kc8adu, Thanks for replying, this uses two MOSFETs not one with this controller (checked, their application notes shows one MOSFET).

I'll pull board and see what IC it is.

Cheers, Wizard

[Krankshaft]

Re: Westinghouse LTV-32W1 SMPS blown

Sheesh 6 bucks for a FET?

Someones milking on the way through the supply chain.

[Gianni]

Re: Westinghouse LTV-32W1 SMPS blown

Wizard check this type FDPF20N50-ND or in this page .
These are rated at 500V while the P20NM50FP is rated at 550V.

Give a look also at FCPF20N60-ND.

Ciao
Gianni