Philips 42PFL5522D/05 Not Powering

[tom66]

Re: Philips 42PFL5522D/05 Not Powering

The diode is in parallel with a resistor, to test it you need to partially lift off the diode. As for the resistor, the only R604 is bottom below chip, do you mean that one?

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

yeah the resistor underneath it, can you see markings on it in 2nd pic.?

Lifted the diode, lifted pin nearest resistor..with red on lifted black on other im getting 580 but it fluctuates
Other way im getting 130..

[tom66]

Re: Philips 42PFL5522D/05 Not Powering

Are you testing across the diode you partially removed? Or just the board?

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

just across the diode, one pin still attachted to the board - will i remove it altogether and test.?

[tom66]

Re: Philips 42PFL5522D/05 Not Powering

One pin should be fine. Diode could be leaky then so worth replacing. Something like 1N4148W would work.

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

Okay - got the bits today, MOSFET, IC and diode - popped them all in, replaced fuse..

Powered on, and a spark came from the board, not 100% sure as it was pretty quick but i think it was from one of the thermistors above the bridge rectifier, it definetly came from something around that area..

Any ideas on where i start re-testing or am i just fighting a losing battle.?

[CapLeaker]

Re: Philips 42PFL5522D/05 Not Powering

I am just saying... at SJ I think you can buy a replacement board for 35$. Depends on you if you want to continue on fixing the old or just replace.
Check the inner to pins of the bridge rectifier for a short.

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

Yeah i saw that, be the handiest option alright but id rather be able to fix these things, but i guess replacing the boards will have to do until i learn the craic..

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

Got the new board from SJ, working grand initially but then the tv starts making noise, and then starts flashing, gets really quick then finishes with a black line down the middle and no flashing..

Any ideas..?

[CapLeaker]

Re: Philips 42PFL5522D/05 Not Powering

pics or a vid maybe?

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

http://youtu.be/28yYWISZKE0

Cheers!!

[CapLeaker]

Re: Philips 42PFL5522D/05 Not Powering

Can you make a pic of your Tcon board?

[liamoc74]

Re: Philips 42PFL5522D/05 Not Powering

Will do - be an hour or so, until then ive uploaded a vid of the sound it makes when flashing - may be some help, sound is coming from psu..

this is a board from sj and i still have old one so i can switch a few components if need be..

thanks again..

http://youtu.be/OMRaaZqUkfI