RCA 42PA30RQ abnormality

[Maushinator]

Re: RCA 42PA30RQ abnormality

No, the voltage holds steady. Tested it for about 2 minutes straight only randomly changed .1v either way.

[Maushinator]

Re: RCA 42PA30RQ abnormality

Yes, rapidly actually.

[Maushinator]

Re: RCA 42PA30RQ abnormality

My eyes played a trick on me.. The voltage drops rapidly with the buffer connected. without the buffer it held voltage +/-.1v

[tom66]

Re: RCA 42PA30RQ abnormality

The buffer is definitely bad then.

[Maushinator]

Re: RCA 42PA30RQ abnormality

I have the new one, shall I swap it out and see what happens?

[Maushinator]

Re: RCA 42PA30RQ abnormality

So I swapped boards.. Not good. With my unit unplugged I connected the ribbons and slid it into the Y main. A little spark emitted from the connector closest to the top (I thought that was normal) tightened the buffer down turned the TV on and... Back to safe mode

[Maushinator]

Re: RCA 42PA30RQ abnormality

I probably should have tested the board before I installed it there is a few .01 readings on the pins

[tom66]

Re: RCA 42PA30RQ abnormality

Was it powered up while you made the connection? Small spark is OK, but the new buffer may have been shorted. Y-buffer boards from cracked plasmas tend to be bad. I'd have to say at least half are. It's just the luck of the draw. I pulled one which is very bad. See here to test (board from PS42B450, similar to your set.)
http://www.youtube.com/watch?v=51SZsfH60EY

[Maushinator]

Re: RCA 42PA30RQ abnormality

Could the panel side be shorting the buffer?
I mean I can't find any apparent issue/s with the Y main... Unless there's something I haven't checked.

[tom66]

Re: RCA 42PA30RQ abnormality

There is a small chance the panel is bad but it is unlikely.

[Maushinator]

Re: RCA 42PA30RQ abnormality

My meter never beeps but here's an example of what I found. Let's say 1200 across each pin, then all the sudden .1,.1,.1 then back to 1200 on the pins for the same chip.

Both my boards are like that. Different chips though. The new buffer I just got has the same model and PBA number, but different REV and PCB. Is that okay?