50" Philips 50pf7320a now power

[satch_jdj]

I got a 50" philips plasma given to me today. The person who gave it to me said that they were watching it and it was like someone just pushed the power button to turn it off. It is getting no power whatsoever. I took it apart and checked all the caps and fuses and all of them look really good. I blew it out real good and vacuumed it. I tried using other cables i had laying around and all have the same outcome. Im not sure why some of the fused have a red, blue or black mark on them but they all seem to be good. Any info would help. Thanks

[satch_jdj]

Re: 50" Philips 50pf7320a now power

???

[tom66]

Re: 50" Philips 50pf7320a now power

When you checked the fuses, did you use a multimeter to test them?

Basic checks - absolutely no power right? No power LED, no sign of life...

Check to see if you get any clicking when plugged in from a relay...

[satch_jdj]

Re: 50" Philips 50pf7320a now power

I used a multimeter and there were no power at all. No clicking from the relay or no leds...not too sure what it is. Maybe the box that the plug goes in?

[satch_jdj]

Re: 50" Philips 50pf7320a now power

Still cant figure this one out...

[tom66]

Re: 50" Philips 50pf7320a now power

Can you post some pictures of the power supply, I will highlight some checks to make.

[Plasma]

Re: 50" Philips 50pf7320a now power

I just picked up one of these too. I pulled back cover. I found the typical 3330uf Caps were slightly bulged at the top. Is there anything special that needs to be done prior to pulling the board? do caps need to be discharged prior?

I don't know that much about electronics, but can do soldering, and understand basics of circuits etc...

[tom66]

Re: 50" Philips 50pf7320a now power

Unplug the power supply 30 minutes before servicing, that should be fine.

[Plasma]

Re: 50" Philips 50pf7320a now power

Unplug the power supply 30 minutes before servicing, that should be fine.

So I can just unplug the various connectors, pull circuit board and perform operation?

Is there issue with capacitors that might be under load?

Thank you.

[tom66]

Re: 50" Philips 50pf7320a now power

Just mains power.

The capacitors typically have a voltage no greater than 20V across them which does not pose a shock hazard. However, if you wish to be sure, you may measure the capacitors before desoldering them.