LG50PC1D Plasma PSU Power up procedure.

[nogger]

Hi all
Just wondered if anyone had the procedure for bench testing this PSU for bringing up the output voltages in the correct sequence.

Procedure i have used so far is:

I get 5.3v standby & 4.8v on the AC detect pin.
Linking the Stby volts to RELAY ON i get all the secondary voltages (except 3.3 & Va/Vs) Again linking Stdby volts to the 3.3v_ON i get the 3.3v, so far so good.
Next i linked the Stby volts to the M5V_ON i get the 5 volts.

If i now link VS_ON to 5volts Va & Vs momentarily kick in before the relay drops out so not sure if i am testing in the correct sequence or if i have a VS/VA fault.

The original complaint from the owner wasjust set would come on but takingb longer &longer whichi attributed to the failing output caps.

Graham

[tom66]

Re: LG50PC1D Plasma PSU Power up procedure.

On these supplies Vs needs to be loaded or it will go up to about 220V then shut down due to over-voltage protect. A 60W or 100W, 230V light bulb works well.

[nogger]

Re: LG50PC1D Plasma PSU Power up procedure.

Thanks Tom,thats exactly the kind of info that i was looking for. I will give it a bash now & report back.

[nogger]

Re: LG50PC1D Plasma PSU Power up procedure.

Tom that's spot on, works a treat.

Thanks for your help

Graham