Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

[lyt]

Greetings all,

New to the forum but have used it as a resource before...thanks ....
Tried to look this up....but others boards looked different than mine....
I'll try to make this quick....

I picked up a vizio vx32L HDTV circa 2006 from a neighbor who said it just stopped working and left it in the trash. The TV looks like new, so I figured I should at least give it a try. I suspect the power board, but since I am quite proficient with a temp controlled soldering iron, I thought instead of purchasing a new board that may not last long since these boards cannot be found "new" anymore, I should just replace the component that failed.

Here is the power board:



the part # of the board is 0500-0502-0180

ok so when I first got it... I plugged it in and pressed the power button ....the front light came on for about 3 seconds and then off.... then I could not power on. Then I unplugged for 5 seconds, plugged in, powered on and got the same thing.... I could power on for 2-3 seconds, sometimes with a slight buzzing noise.

Then I opened up the back of the TV, plugged in, powered on to start the testing and heard a LOUD ZAP (scared the BJesus out of me) and now I cannot power on at all.

Ok so where do I start....I have my meter, TV is plugged in, how can I proceed to test?

[Dgtech]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Check the main fuse. I hope the original problem and the zap are connected. Post the pic of your other boards.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Check the main fuse. I hope the original problem and the zap are connected. Post the pic of your other boards.

I have been unable to locate a fuse on this board. I cannot see it anywhere. I was looking for a cylinder shaped regular fuse, but to my surprise it's no where on this board. is it located elsewhere?

[Mr Bill]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Here is a picture of where your main fuse is. For future reference please use the manage attachments for your pictures. Some of the "regulars" either have a slow connection speed or a pay per data plan. You might have to shrink the picture with paint to get it within the 2000 x 2000 limit.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

yes sorry, was not aware... so you prefer links to these? instead of IMG?

Ok so the fuse is hard wired to the board? I guess I am behind the times.... I am unfamiliar with this style fuse... how to I check it?

detailed instructions would suffice, do i remove board and meter it?

[MisterD]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

See that large black capacitor on the power supply board? has a + for positive on the right as in the picture in post #4, with the set plugged in set your Meter to DC Volts and very carefully not to let the probes slip, place the black probe of the meter on the left negative lead and the red probe of your meter on the right positive lead of this capacitor, you should have about 165 volts, if you do then the fuse is good, that way you don't have to pull the board to get to the bottom circuit traces to check it's continuity.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

See that large black capacitor on the power supply board? has a + for positive on the right as in the picture in post #4, with the set plugged in set your Meter to DC Volts and very carefully not to let the probes slip, place the black probe of the meter on the left negative lead and the red probe of your meter on the right positive lead of this capacitor, you should have about 165 volts, if you do then the fuse is good, that way you don't have to pull the board to get to the bottom circuit traces to check it's continuity.

wow

ok i went to go do the test and plugged in television....and BANG again. loud POP scared the crap out me again. Seriously loud zap.

I am nervous to touch the thing really....

[MisterD]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Did you drop any screws into the chassis or circuit boards while removing the back? examine it closely, if you don't find anything then I suggest lifting the TV face up and seeing if any screws of anything metal falls out.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

O boy,

ok I just attempted (beyond my safety instincts) to recreate the ZAP.

It appears to be coming from the bottom of that large capacitor I was told to test. There does appear to be a small pin hole in the side, like something hit it. In other words, the black plastic coating has a pinhole where i see metal. the plastic on the bottom was blown clean off so what do i do?...

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Did you drop any screws into the chassis or circuit boards while removing the back? examine it closely, if you don't find anything then I suggest lifting the TV face up and seeing if any screws of anything metal falls out.

I am quite a meticulous person, not careless at all ... all screws are placed in an area where i can remember them and where they go.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

perhaps i dropped a screwdriver on it? or accidentally scuffed it?

will this behaviour be expected if so?

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

ok so let's change this thread to "how to replace a capacitor without dying"

lol..

well it is quite domed.....i would imagine it is the culprit, or at least one of them.....

[MisterD]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

I think that Main Capacitor has blown and will need to be replaced, I'm really not sure if any other components are shorted on your power supply board, it looks like someone removed the metal cover from the power supply and poked a hole in that capacitor during the process.

You can remove and replace the capacitor and should be able to find a replacement, I would think the value would be printed on the black plastic cover, another similar Vizio power supply I saw has a 150UF 450V Main Capacitor. here's a place to purchase a replacement power supply board, but you may want to just start with replacing the Capacitor on yours.

http://www.shopjimmy.com/catalogsear...0500-0502-0180

[Mr Bill]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Will you post a picture of the large cap where the mark is you suspect? You can test the large cap and see if it's shorted with your meter set to OHMS. Make sure the power supply is unplugged from the 120v outlet. i'd let it sit unplugged for about 5 minutes before preforming the test.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Hi Yes I saw the board, thanks for the link......

But as I said earlier, buying a used board does not appeal to me.... simply because it is used. life expectancy is not great....

it is a 450 150 CAP i will replace and continue troubleshooting once finished....

really do appreciate all the help on this....

[MisterD]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Will you post a picture of the large cap where the mark is you suspect? You can test the large cap and see if it's shorted with your meter set to OHMS. Make sure the power supply is unplugged from the 120v outlet. i'd let it sit unplugged for about 5 minutes before preforming the test.

I can see it in post #1, The large black Main Cap. it appears something has penetrated the exterior shell.

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Will you post a picture of the large cap where the mark is you suspect? You can test the large cap and see if it's shorted with your meter set to OHMS. Make sure the power supply is unplugged from the 120v outlet. i'd let it sit unplugged for about 5 minutes before preforming the test.

yes continuity is broken in the CAP. i read 1 not 0

[lyt]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

I can see it in post #1, The large black Main Cap. it appears something has penetrated the exterior shell.

yes agreed.... being as careful as I usually am... i do not see how i did this....however there is always a chance......

either way i will replace cap and be back!

[MisterD]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

Hi Yes I saw the board, thanks for the link......

But as I said earlier, buying a used board does not appeal to me.... simply because it is used. life expectancy is not great....

it is a 450 150 CAP i will replace and continue troubleshooting once finished....

really do appreciate all the help on this....

you want to make sure it's 150uf at 450Volts and not the other way around, or the new one will blow for sure if it's only 150 volts.

[Dgtech]

Re: Help with VIZIO VX32L HDTV (2006) 0500-0502-0180

yes continuity is broken in the CAP. i read 1 not 0

Caps should read open - infinite resistance. If a cap reads zero ohms then it is bad. Resistance is only one way to test one aspect of a cap. Another way is a capacitance test. ESR testing is a third way.

I suspect bad caps on the two inverter boards as well. Post pics of these two boards as well. I just fixed a digital lifestyles tv with a similar layout.