Phillips 42PFL6704D/F7 blows fuse when plugged in

[smai]

Hey guys (and gals if any ) got this tv no power at all opened it up and circled cap was blown and left some soot on the board, replaced it and the fuse and as soon as i plug it in it just blows the fuse. I checked resistance at the plug and it shows starts at 5M ohms and climbs to 14.5M ohms and holds does that mean nothing is shorted?

I searched for service manual but i nothing for this exact model (board is PLHL-T828A)

any ideas which direction to go next ? Thanks

[Hamie]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

Theres no pictures attached?

[smai]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

sorry that happened when im sleep deprived

[dick_barton]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

Device alongside it has probably short circuited. Red box. Use you meter to check between the 3 legs.

[dick_barton]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

Manual
https://www.electronica-pt.com/esque...ileinfo/25749/

Power supply may be similar.

[smai]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

Device alongside it has probably short circuited. Red box. Use you meter to check between the 3 legs.

that is a mosfet, this is what happens multi meter set to 200k ohms
- probe set on the source + on gate = meter shows 9.9
- on source + on drain ohms climb to about 168 then shows open then stays open when checked a few min later flashes anywhere from 168 to 192 then shows open
- on gate + on drain same as above

i already downloaded both those links, the service manual doesnt go into detail on the PSU board and the other schematic, the board is too different

Thanks

[budm]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

Can you provide good clear straight shot pictures of the whole bottom side of the power supply board?

[smai]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

im now realizing my camera sucks let me know if you need better images thanks

[smai]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

update i found a similar board for a different model, looks exactly the same just a couple things are different, i decided to use the replacement as a guide to repairing the old one, i started at the plug and worked my way though only checking for continuity that lead to a shorted mosfet (EY43 if anyone cares) ordered a couple new ones well see how that works out thanks people

[smai]

Re: Phillips 42PFL6704D/F7 blows fuse when plugged in

back up and running!!!