Vizio gv47l fhdtv10a

[budm]

Re: Vizio gv47l fhdtv10a

U5 correction:
3.26 In, 3.0 Out, 1.08 Adj

I confirmed the Out several times.

Part number is:
AMC1117
F0706J

Close up of U5/U10/U9 attached.

Still think replacing that AMC1117 at U5 is a good starting point?


I'm still not getting how to check out those fuses...
With the unit off I get continuity but how do I check the current draw?

Thanks again

It is bad, replace it first and go from there. The DCV between ADJ pin and the Vout pin should be = 1.25V, you have almost 2V.

[jwillifixit]

Re: Vizio gv47l fhdtv10a

Smacking palm to forehead... now that makes sense!

Cheers

[jwillifixit]

Re: Vizio gv47l fhdtv10a

Guys... thanks so much for the assistance! I have the 1.5 amp fuse (I know it's not needed but) and the voltage regulator on order and on the way. It is going to be so exciting to swap out that part and see if a simple $1.74 part can fix this nice TV. I checked pin 3 to ground on all the other IC's and they all seemed okay so I'm thinking it's just this one. We'll see in a few days when the parts get here.

[budm]

Re: Vizio gv47l fhdtv10a

If you cut the legs of the IC off first then use flux and add solder to the big tab then it will be easy remove IC using 40W soldering iron with wide tip.

[jwillifixit]

Re: Vizio gv47l fhdtv10a

THANKS ALL...!!! It was that voltage regulator IC and that seems to have been all. I had some trouble getting the old one off and then realized that my soldering iron simply wasn't getting hot enough. I picked up a new one and from there it was a piece of cake. Image is crisp and bright, sound is awesome with those big external speakers (one being a subwoofer). I may not sell this and just put it on the wall of my garage shop? Hey silly question but what happens if you leave an LCD tv in your Green Bay garage over the winter?

[budm]

Re: Vizio gv47l fhdtv10a

Thanks for the follow-up on the repair.

[Agent24]

Re: Vizio gv47l fhdtv10a

The TV's user manual should give some indication as to the temperatures\moisture levels it can withstand during storage and operation.

But, if you think the garage is too damp or cold, then maybe it is, for a cheap TV.

[PotShotScott]

Re: Vizio gv47l fhdtv10a

I have the same TV with a very similar problem. No backlight. The caps on the backlight inverter boards were roached. I replaced them all with new 680uF@35V (except for one that's a 25V cap) I have all of the needed voltages including the turn on at the master board (24V, grounds and 3.1v and 5V). This is at the master. Is there anything else I should be looking for? Relay clicks, TV turns on, Vizio lights up and then the logo lighting goes weak.

TV has audio when connected to video source. The backlights simply do not turn on.

Thoughts?