VIZO VX32l HDTV10A

[geep]

I am needing some help on this one. I have searched the forum and read the post on this style VIZO TV seems most problems are with the voltage regulators. the tv has no back lighting but the vizo emblem turns from orange to white back to orange with power button. I have not checked the audio short of turning up the volume with the audio + button no sound heard but no audio source hooked up to tv either. tv has 5 volts from j7 power header but no 12 or 24 volts. The voltage regulators are as follows
U2
AMC 1117
f0632j
1 3.24
2 5.25
3 8.14

u4
AMC 1117
f0632j
1 3.27
2 5.27
3 8.09

u7
AMC 1117
f0632j
1 0
2 1.93
3 5.07

u8
AMC 1117
f0632j
1 3.22
2 5.19
3 8.00

u9
AMC 1117
f0632j
1 0.38
2 2.31
3 5.08

u33
AMC 1117
f0632j
1 3.14
2 5.03
3 7.88

[geep]

Re: VIZO VX32l HDTV10A

HERE are some pics of the set

[budm]

Re: VIZO VX32l HDTV10A

U2, the output should be 1.25 + 3.24 = 4.49V, you are getting 5.25V
AMC 1117
f0632j
1 3.24
2 5.25
3 8.14

u4, the output should be 1.25 + 3.27 = 4.52V, you are getting 5.27V
AMC 1117
f0632j
1 3.27
2 5.27
3 8.09

u7, the output should be 1.25 + 0 = 1.25V, you are getting 1.93V
AMC 1117
f0632j
1 0
2 1.93
3 5.07

u8, the otput should be 1.25 + 3.22 = 4.47V, you are getting 5.19V
AMC 1117
f0632j
1 3.22
2 5.19
3 8.00

u9, the output should be 1.25 + .38 = 1.63V, you are getting 2.31V
AMC 1117
f0632j
1 0.38
2 2.31
3 5.08

u33, the output should be 1.25 + 3.14 = 4.39V, you are getting 5.03V
AMC 1117
f0632j
1 3.14
2 5.03
3 7.88

Since ALL the outputs are wrong, I would say check you meter's batteries first! Are you using chassis ground as the ground ref?

[geep]

Re: VIZO VX32l HDTV10A

i will check battery in my cheapo meter. i was using one of the power board hold down screws for ground

[geep]

Re: VIZO VX32l HDTV10A

went to the store got new 9v battery old one was at 6.4v then i rechecked voltage regulators they still seem off
u2
AMC 1117
f0632j
1 2.03
2 3.28
3 5.06

u4
AMC 1117
f0632j
1 2.05
2 3.29
3 5.06

u7
AMC 1117
f0632j
1 0
2 1.24
3 3.25

u8
AMC 1117
f0632j
1 2.05
2 3.30
3 5.10

u9
AMC 1117
f0632j
1 1.24
2 1.47
3 3.25

u33
AMC 1117
f0632j
1 2.02
2 3.25
3 5.06

[budm]

Re: VIZO VX32l HDTV10A

u2, 1.25 + 2.03 = 3.28V Good
AMC 1117
f0632j
1 2.03
2 3.28
3 5.06

u4, 1.25 + 2.05 = 3.3V (3.29) Good
AMC 1117
f0632j
1 2.05
2 3.29
3 5.06

u7, 1.25 + 0 = 1.25 (1.24) Good
AMC 1117
f0632j
1 0
2 1.24
3 3.25

u8, 1.25 + 2.05 = 3.3 Good
AMC 1117
f0632j
1 2.05
2 3.30
3 5.10

u9, 1.25 + 1.24 = 2.49, You got 1.47V BAD
AMC 1117
f0632j
1 1.24
2 1.47
3 3.25

u33, 1.25 + 2.02 = 3.27 (3.25) Good
AMC 1117
f0632j
1 2.02
2 3.25
3 5.06

So you have one bad regulator. Do you see how I come about finding out which is good which is bad? The output should be within 2%. Please read the link below so you will understand, I also provide the link to Digikey for ordering adjustable 1117 series regulator.
Thanks for posting correct format on the read out of the regulator, it makes my job much easier.

[geep]

Re: VIZO VX32l HDTV10A

thank you for the help. I will read more about the regulators

[martyparish]

Re: VIZO VX32l HDTV10A

Hey geep, you may want to check my thread here. I have exact same power supply as you and I am thinking you may have PSU issue as well.

[MisterD]

Re: VIZO VX32l HDTV10A

I repaired a Vizio 42" with the AMC1117 Series Regulators,only one regulator was bad, U7 in my case. But since U33 seems to have a high failure rate in these Vizios I replaced it as well, they were 49 cents each from Digikey, Power supply was fine in mine and the set is still working since October.

[retiredcaps]

Re: VIZO VX32l HDTV10A

thank you for the help. I will read more about the regulators

How to test a voltage regulator.

https://www.badcaps.net/forum/showthread.php?t=22231

We get these low battery problems about once a week. Some cheaper multimeters do not display low battery warning on the lcd and give incorrect readings which leads us on wild goose chases.

[geep]

Re: VIZO VX32l HDTV10A

So there are a LOT of voltage regulators on digikey. I am not sure of my choice so if some one could give me a little guidance would on of theses work
http://www.digikey.com/scripts/dksea...732&PV1291=140

[tom66]

Re: VIZO VX32l HDTV10A

I myself use TLV1117 (high reliability, 125C max operating temp): http://www.digikey.com/product-detai...98-1-ND/705738

[geep]

Re: VIZO VX32l HDTV10A

would these work http://www.ebay.com/itm/TI-LM1117MPX...item5d351ba23f

[tom66]

Re: VIZO VX32l HDTV10A

Umm yeah, but digikey is like $3 shipping... so not worth it as you only need one (get one spare maybe.)

[geep]

Re: VIZO VX32l HDTV10A

I dont have a credit card just dont like them i am in the usa so probably more than that for shipping not sure if digikey is in the usa or not

[tom66]

Re: VIZO VX32l HDTV10A

Digikey is based in Minnesota which I believe is one of the States of the Union.

You need a credit/debit card to pay with PayPal anyway... so I dunno what difference it makes...

[geep]

Re: VIZO VX32l HDTV10A

i use green dot money packs

[tom66]

Re: VIZO VX32l HDTV10A

OK, in which case those parts look fine to me.

How to replace the part:
https://www.youtube.com/watch?v=cNFzBJELFoU&t=8m30s

Be careful not to lift the pads.

[geep]

Re: VIZO VX32l HDTV10A

Thank you all for the help. When i get the parts in i will update this thread thanks.

[geep]

Re: VIZO VX32l HDTV10A

well i got the voltage regulators in and i am still only seeing .24 on the nubber one pin on u9