Philips 40pfl5505d/f7 power supply dps-320lp

[ozzy214]

Trying to figure this power supply out. No 5v reference, dead as a door nail. Got power in, fuse good. Two of the mosfets on the heatsink lower left is dead, no voltage in or out. The third one has voltage on 2 legs, other 2 dead. I cant get at the mains caps to check for voltage there with the shield on. And kinda nervous benching testing live while its upside down to check from underneath. This a stock photo I got off ebay. Can you point what to check as maybe I can save it....

[vinceroger69]

Re: Philips 40pfl5505d/f7 power supply dps-320lp

What Chassis do you have
look at the sticker on the backside of the lcd tv we can see if we can then find a service manual

[ozzy214]

Re: Philips 40pfl5505d/f7 power supply dps-320lp

What Chassis do you have
look at the sticker on the backside of the lcd tv we can see if we can then find a service manual

I dont have the cover for the back of the tv, so planning on keeping for myself. One of many basket cases Im resurrecting for myself. I also grew a little courage and the main caps are reading roughly 360v.

[CapLeaker]

Re: Philips 40pfl5505d/f7 power supply dps-320lp

I gues we need better pics than that.

[ozzy214]

Re: Philips 40pfl5505d/f7 power supply dps-320lp

Well I think its dead jim lol. I found one chip that according the diagram regulates the 5v line. Two of the legs were in the hole, but not even soldered!!! I tried to solder it and made a mess. For some odd reason solder was wicking onto the iron, but wouldnt wick on the legs. So unless someone here wants to try to fix my hack solder job, its toast. Sigh,...its real peculiar. I have soldered caps no issue, but the solder wouldnt "stick" to it. HMM..maybe I should just stick to replace board instead of repair lol.

[CapLeaker]

Re: Philips 40pfl5505d/f7 power supply dps-320lp

That's a question of cost, but if you have to, this board still can be repaired.

[CraigR]

Re: Philips 40pfl5505d/f7 power supply dps-320lp

Well I think its dead jim lol. I found one chip that according the diagram regulates the 5v line. Two of the legs were in the hole, but not even soldered!!! I tried to solder it and made a mess. For some odd reason solder was wicking onto the iron, but wouldnt wick on the legs. So unless someone here wants to try to fix my hack solder job, its toast. Sigh,...its real peculiar. I have soldered caps no issue, but the solder wouldnt "stick" to it. HMM..maybe I should just stick to replace board instead of repair lol.

I know this is old post but those legs are not used, and so nothing to solder them to.