LG-50HP660V - Board testing

[dick_barton]

Hello,
I've acquired this set which has a shattered screen that I intend to strip down for spares/repairs.

I've disconnected the power supply from the Xsus (which links across to the Ysus) and all the power supply voltages come up when switched out of standby.

The set also has sound and respond to the remote control.

Is there any way to power up the Xsus, Ysus and control board for testing without blowing any of the boards.

Thanks

[Alastair E]

Re: LG-50HP660V - Board testing

ould have thought the chassis would run if all is well--providing the tabs to buffers and X are disconnected from the boards...
--Never tried it, but cant see why it shouldnt run...

BTW--Your chip-shop is just down the road from me....!

http://nadeshiko-manchester.up.n.see...a202.jpg?d=a10

[dick_barton]

Re: LG-50HP660V - Board testing

Thanks Alastair, That's what I was hoping I could do. Will let you know how it pans out.

Just googled it. Haven't been over that side of Swansea for many years. Is it any good?

[Alastair E]

Re: LG-50HP660V - Board testing

Thanks Alastair, That's what I was hoping I could do. Will let you know how it pans out.

Just googled it. Haven't been over that side of Swansea for many years. Is it any good?

Rather expensive, never open when you want it--but guess its OK. Other chippies round here-
Covelli's in Mumbles used to be OK, but haven't been there since new people took over.
Johnnies has gone downhill--Cook to order, take forever and not nice...
I dont rate Rossi's by the stadium at all, regardless of all the publicity...

Best chips Ive had--at least round here would be from Charlos in Pontardawe...
Massive portions, and well cooked, Feller who runs it is Round, a huge round bloke always happy tells jokes all the time--you cant understand due his accent, and laughs after telling 'em...

[dick_barton]

Re: LG-50HP660V - Board testing

Checked both Xsus and Ysus panels for shorted diodes, mosfets and all appeared to be fine.

Powered up with the plasma panel ribbons disconnected and reconnected all supply cables.

Measured +Vy and Vzb. The +Vy voltage was rising fairly fast towards +300V and then dropping out. I believe that over voltage protection was kicking in.

So it certainly doesn't look like any major faults on the boards.

Thanks to Alastair for his advice.