Pioneer Elit 1120HD Power Supply issue?

[tom66]

Re: Pioneer Elit 1120HD Power Supply issue?

Continuity is one click from the last V~ setting, the one that has the audio symbol and diode symbol. Sorry on mobile so can't highlight it. This is for seeing if any outputs are shorted Freak's test is more general

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

Thanks Tom. I see it. So if it beeps, its good?

[tom66]

Re: Pioneer Elit 1120HD Power Supply issue?

Beep is bad that's a short
There should be no beeps, you may briefly get one but it shouldn't be continuous

[tom66]

Re: Pioneer Elit 1120HD Power Supply issue?

One thing you can do as well is run the probe along the connection quickly which should let you find shorts in not much time. Test your meter first by touching the probes together and you should hear a beep

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

Forgot to ask, where does the black probe and red probe go in the highlight square you showed me?

[tom66]

Black probe on the gold pad
Red probe on each of the vias/micro drills.
You may be able to run the probe fairly quickly along the vias as I said above.. This depends on your meter being fast enough (most are)

You're basically trying to test between the big gold pad and the outputs of the buffer/scan board

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

I get it for the red probe but for the black, where is the 'gold pad'? Sorry for my noviceness!!!

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

Oh you mean the GRND gold pad right?

[freakaftr8]

Re: Pioneer Elit 1120HD Power Supply issue?

Yes use GNDH for the grounding point. This would be a sure test to know if in fact those scan ICs are shorted or not. Its a time consuming process but a thorough one.

[tom66]

Re: Pioneer Elit 1120HD Power Supply issue?

This is my video on this technique. I believe I'm actually the originator of this check - but been a while...

https://www.youtube.com/watch?v=51SZsfH60EY

If your meter responds quickly to continuity it takes almost no time at all.

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

If found 4 vias/micro drills that beeped in the lower board. See picture with red dots.

I tried doing the same test to the upper board but I wasn't getting a reading. i.e. no numbers would show up. Just the L. I am not sure what I was doing wrong.

[freakaftr8]

Re: Pioneer Elit 1120HD Power Supply issue?

Unfortunately, there's your problem with the tv...

This board is unreplacable. How many hours would you say you have on this set?

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

Well I bought back in 2005 or 2006 and has been the main TV in the house.

Maybe there is a board I buy on Ebay or something.

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

Replacing the IC Scan chip by a professional?

[freakaftr8]

Re: Pioneer Elit 1120HD Power Supply issue?

Since this board is fused to the panel, it cannot be replaced. The IC can but it requires a certain skill to do so. Hot air and a fine point soldering station. Flux as well. I have done it quite a few times, unfortunately I cannot just have you send me the board for repair..

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

Maybe someone locally can do it?

[freakaftr8]

Re: Pioneer Elit 1120HD Power Supply issue?

I'm sure in Maryland you can find someone. That's like east coasts tech area!

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

There is a place .5 miles from my house. Ill give them a call. Is it worth it though?

[freakaftr8]

Re: Pioneer Elit 1120HD Power Supply issue?

Thats always the question.. These IC's are like tires. When one goes, it's usually a sign that the others may be on their way as well. But Given Pioneers reputation, like Tom said, they use a better way of driving the ICs so they are not "maxed out" all the time so. It's a gamble.

[Boyd1966]

Re: Pioneer Elit 1120HD Power Supply issue?

What would you expect the charge for the work would be? Ballpark...

I am planning on buying the Sony XBR75X900E TV. Good reviews. Good price too now.