Working on a Vizio 320E that has issues with the main board. The main IC U12 gets extremely hot. Wondering if anyone else has had this same problem? How can I confirm it's the main IC. Also has anyone else ever tryed to change this IC? Saw them on eBay for $15.50.
Vizio VO320E main board
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Re: Vizio VO320E main board
Working on a Vizio 320E that has issues with the main board. The main IC U12 gets extremely hot. Wondering if anyone else has had this same problem? How can I confirm it's the main IC. Also has anyone else ever tryed to change this IC? Saw them on eBay for $15.50.Attached Files -
Re: Vizio VO320E main board
https://www.badcaps.net/forum/attach...1&d=1496523291
Sorry about that. Let me know if you need better pictures.Comment
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Re: Vizio VO320E main board
I did remove the aluminum heatsink because I wanted to see the part number on the main IC. It gets very warm.
With in 50 to 60 seconds you can't touch it. I first thought it was U2 voltage regulator because the voltage reading on the output pin was .17 volts and it was also very hot, I change it but nothing changed. I'm thinking that's because something else in the circuit is shorted.Comment
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Re: Vizio VO320E main board
I have already change U2 voltage regulator and it still gets hot because something else in circuit is shorted. Does anyone out there have a schematic for this TV?
I realize this TV isn't worth much money.Last edited by shadetreetrader11; 06-03-2017, 04:39 PM.Comment
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Re: Vizio VO320E main board
I'm sorry I miss read your post. Yes output pin to ground is 0 ohms dead short.Comment
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Re: Vizio VO320E main board
You will need to run that trace and check components for short. If it runs to main processor with no shorted components between then I hope you have good soldering skills.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Vizio VO320E main board
I ordered a main board off ebay because we're getting pretty deep here. So just for fun I took my hot air gun and removed the main IC and the short to ground remained. (which really surprised me because that IC was getting so terrible hot) So then I removed IC U39 and then the short to ground was gone. It now reads 270 ohms to ground. So at this point I guess I really don't know what to say.Comment
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