RCA 42PA30RQ plasma tv problem

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Nothing reads a 0.00.

[capkid]

Re: RCA 42PA30RQ plasma tv problem

Here you go: https://www.badcaps.net/forum/showpo...17&postcount=9

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

high resistance means no shorts, low resistance means a short

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

I read something about that but something confused me. I don't remember exactly what is was but I should be testing the resistance? If so what readings should I get?

[capkid]

Re: RCA 42PA30RQ plasma tv problem

Ok, so your issue is a typical one. I'd stop right there and pull both the Y-main and X-main to check the heat sink components for shorts. If you continue to test without pulling boards, you may do more damage.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

As far as some other things go, there is a slight screen glow I don't notice any pixels when I hit the menu button, one normal click on and the LED on the control board is on for maybe 5 seconds and off for about 2.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Both stay steady over 200 (200 is max on my multimeter). With the Y main plugged in the voltage drops.

[capkid]

Re: RCA 42PA30RQ plasma tv problem

If you'd said the opposite was happening, you could probably point to the Y-buffer as being the issue. Otherwise, the Y-main being disconnected pretty much means the Y-buffer is disconnected, too. How does your VS voltage look?

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Here is the pictures..

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

OK I think Tom66 would be best at helping with this...

Take pics of each board and then one of the entire back of the chassis so we can see everything.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

My VA with everything accept the Y buffer unplugged is staying steady at 120..

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

Ok whats the issue?

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

I have a similar problem with my RCA 42PA30RQ. I've read various posts but none of them cover my exact problem. I am also unable to create a new post as I just became a member today..

[Stude]

Re: RCA 42PA30RQ plasma tv problem

X Main shows a short.
Thanks for everyone's help. I think next time, I will save myself money and time and just send the tv to be recycled from the start.
We have all Panasonic tvs now, so hopefully won't have premature failures. 18 months is a pretty short life span for a tv, not impressed with this RCA/Samsung for sure.

You all have a Merry Chrisymas and happy New Year.

[capkid]

Re: RCA 42PA30RQ plasma tv problem

Pull your mains and check the transistors and diodes again. I'd probably bag it if you find shorts.

[Stude]

Re: RCA 42PA30RQ plasma tv problem

Update:
Received second Y main and Y buffer from Retech and installed. Checked the transistors and diodes on the Y main before installing. No shorts found. X Main had been checked, no shorts found. Verified all of the plugs and ribbons are seated properly and locked in place. All screws installed in the panels.
Watched the screen as I turned it on the first time. First click on- There were some lines that flashed blue for a second and then two more clicks- nothing. Seems I am back at sqaure one. Three clicks of the relay and no worky. This time I did notice a green LED that slowly flashes on a small panel in behind the output board. Could have been flashing before but I never noticed it.
Removed the Y buffer, and turned on, still clicks 3 times and off. Unplugged the X Main and clicks once and apparently stays on. Appears to be an X Main problem again, but I am not sure of much at this point.
Any suggestions before I call it quits on this and blew a bunch of money for nothing?

[capkid]

Re: RCA 42PA30RQ plasma tv problem

I agree that the panels rarely are at fault in these Samsungs.

[Stude]

Re: RCA 42PA30RQ plasma tv problem

I was finally able to contact Retech Tv and explained the situation, and they are sending another Y Main and Y buffer. I metioned replacing all 3 boards to be safe, but I guess it is their call as the X Main tested maybe ok.
The guy metioned that the panels can short out even though there may not be any visible cracks, although he stated it is on seldom occasion that they see a bad one.
So, I will see what happens, and let you know how it ends up. Hopefully good, because if it doesn't work this time, it is probably headed to the transfer station to get recycled. "Gotta know when to hold em, and when to fold em".

[tom66]

Re: RCA 42PA30RQ plasma tv problem

Especially given a good number of the Y-buffers are damaged after the screen cracks (which they are pulls from, cracked screen sets.)

[capkid]

Re: RCA 42PA30RQ plasma tv problem

I personally don't trust the old Y-buffers and the tests performed to verify their states in these thin-profile Samsungs, but they rarely fail. Also, I'd perform the same heat sink component tests on your replacement X-main and Y-main before installing them.