Re: Vizio JV50P HDTV10A Plasma

I used my Kill-O-Watt meter on the panel today ... during a typical TV show it was running around 3.8amps, 450 watts. Not as bad as I thought.

I think we probably average around 6-7 hours per day run time, so that would be about 210 hours per month, which works out to about 94KWh per month. Round that to 100Kwh/month. In my area (California, near Fresno) the more power you use the more it costs, and I usually average around 1500Kwh per month during the summer months due to air conditioner use. Using that level of power probably works...

Re: Vizio JV50P HDTV10A Plasma



When I was looking for a source for the 1117 regulator I did see at least one manufacturer that rated it as 1.5a, although I am suspect of that rating. When you check the data sheet for a 1117 it normally says 800ma. Maybe it can handle higher current depending on how it's mounted (soldered) to the pc board.

Considering it took 5 years for the regulator to fail I don't think it's a big risk to use the same part. Part of the problem may be that it appears the output of U33 is used as source voltage for two other regulators...

Re: Vizio JV50P HDTV10A Plasma

Well, that was easy

I was just about to order a couple of AMC1117 regulators when I decided to look at my "graveyard" of old motherboards that I keep around (I fix computers for a living). I figured in the computer world 3.3v regulators are probably pretty common. Sure enough, the first board I checked had three of those little rascals on it. So I got out my SMD rework tool and removed one of them and transplanted it to the U33 position on the Vizio's main board. I then hooked everything back up, powered it up and - it WORKS!...

Re: Vizio JV50P HDTV10A Plasma

Yes, I was being lazy ...

I found a nice thread at [URL="http://www.ecoustics.com/electronics/forum/home-video/590118.html"]http://www.ecoustics.com/electronics/forum/home-video/590118.html[/URL] that, along with your help put me on the right track.

After measuring voltages on the LDOs I see U33 is probably bad. It supplies 3.3v to U7 and U9, which make them appear bad too, but they are not because they do not have any source voltage and U33 does.

The only thing I am not sure of is if the LDO is...

Re: Vizio JV50P HDTV10A Plasma

I only saw two voltage regulators on the main board, one on the left side, near the WiFi module (an LDO) and one on the right (a standard 7805T). The 7805T checks ok with 5V, the 1084 is a bit harder to check because I believe it's output is adjustable. I get 1.3v on pin 1 (adj), 2.6v on pin 2 (Output) and 4.8V on pin 3 (Input). I have no idea what the output voltage should be, but 2.6v seems a little odd. However, I would expect the output voltage to be lower than the input voltage, which it is. Maybe I should replace it anyway, it's cheap enough....

Hello all,

I've come across a non-working Vizio 50" Plasma TV that was abandoned by it's owner. It is a Vizio JV50P HDTV10A. The inside label says it's made by LG and it's model number PDP50X4TA35.

The previous owner said they watched the TV all day and the next morning they went to turn it on and got nothing, other than a click. No pops, smell or picture/sound problems prior to it dying.

I pulled the back and had a look around. I don't see any evidence of bad capacitors, although I did check the ESR many of the larger ones on several boards. The...