So I got this thing broken. When I go to test it, it will turn on and function as a completely normal TV. When I hit the power button when it's cold, it will turn back on when I hit the power button. It will not after being turned on for a long time. And it will run for as long as you want until you turn it off. I brought it to my apartment to temporarily use and now it won't even turn on...All the caps look good on both the main board and the power board although not a fan of the cap choice. Is it probably the voltage regulators on the main board? I'll get my multimeter back tomorrow. In the meantime, is there any ideas to what it could be?
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Re: Vizio 37" having intermittent issues
Sounds like an intermittent regulator though Vizio I know used some crap caps in their 37" PSUs.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Vizio 37" having intermittent issues
Yeah I'll have to check the regulators. The caps on the PSU are Sam Young on the secondary and a NCC on the Primary. Some of the Sam Young's looks like there's pressure in between the vent stamps but not bulging towards the middle, know what I mean?Comment
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Re: Vizio 37" having intermittent issues
Whats the model I might have the power board? Not, for free but I'll work with you on the price.Originally posted by Pentium4 View PostComment
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Re: Vizio 37" having intermittent issues
I prefer these types of problems rather than the intermittment ones. I have an ATX power supply that sometimes works and then dies and sometimes it doesn't power on. I wish it would just do the latter and then I can start troubleshooting it.Originally posted by Pentium4 View Post--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Okay so I got around to testing this thing. Let me know if there are more I need to test if I missed any. Looks like I have at least 1 bad voltage regulator...Here are the results:
#1
Pin 1 = 0.000
Pin 2 = 1.252
Pin 3 = 3.326
#2
Pin 1 = 2.056
Pin 2 = 3.306
Pin 3 = 5.050
#3
Pin 1 = 0.000
Pin 2 = 0.000
Pin 3 = 0.000
#4
Pin 1 = 0.559
Pin 2 = 1.816
Pin 3 = 3.333Attached FilesLast edited by Pentium4; 10-24-2012, 09:09 PM.Comment
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Re: Vizio 37" having intermittent issues
1) What is the part number for #3?Originally posted by Pentium4 View Post
2) Are there any DC voltages on the caps around the #3 regulator?
3) Are there any DC voltages on the resistors around that #3 regulator?
4) Can we get a close up shot of that area?--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Thanks for the reply! Part # is: EH11A 127F25. Circled is the closest thing that gets DC power (I didn't test the caps though)Attached FilesLast edited by Pentium4; 10-24-2012, 09:43 PM.Comment
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Re: Vizio 37" having intermittent issues
What is part number TU1? Post a link to its datasheet as well.--- begin sig file ---
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Re: Vizio 37" having intermittent issues
On pin 3 of TU8 (regulator #3), see what it has continuity to. Namely, does it have continuity to any pins on TU1 or the caps TCE5 and TCE6?--- begin sig file ---
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Re: Vizio 37" having intermittent issues
All 4 of them have the same Part # on them.
thank you for your help so far!
Pin 3 of #3 has continuity to only cap TCE5Last edited by Pentium4; 10-24-2012, 10:35 PM.Comment
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Re: Vizio 37" having intermittent issues
I mean the datasheet for TU1 (8 pin IC).--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Ohhh okay. I can't find anything on it. It reads:
432N
C0J5
07
Thank you for being patient with me
Last edited by Pentium4; 10-24-2012, 10:48 PM.Comment
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Re: Vizio 37" having intermittent issues
1) See if there is DC voltage across the TCE5 cap.Originally posted by Pentium4 View Post
2) See what else is the + leg of TCE5 is connected to.--- begin sig file ---
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Re: Vizio 37" having intermittent issues
It could beOriginally posted by Pentium4 View Post
https://cdn.badcaps-static.com/pdfs/...a5f3eed1f1.pdf
See if pin 3 (VCC) has any voltage wrt to chassis ground.--- begin sig file ---
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Re: Vizio 37" having intermittent issues
Whats the model I might have the power board?Comment
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