Vizio 60" E601I-A3 no display have sound

[tom66]

Re: Vizio 60" E601I-A3 no display have sound

Probably are.
Big one may be SMA/SMB size.
Small one may be SOD-123 or SOD-323 size.

[ecking767]

Re: Vizio 60" E601I-A3 no display have sound

Thanks!
And please - Would you be able to identify the following components -
COXA 16(sideways)
XOW 11(sideways)

B1 Y225
B2 Y234
C403 233

I had an working T-CON board on my work bench and I concluded those parts wasn't the problem.But I did find on the working board there was 1.2 volts on the AO4854 pins 5-8. The non working board I was getting only 0.2 volts.

shameem can you confirm this measure on the AO4854?
I also replace the AO4854 and got the same low voltage.


Thanks
ecking767

[shameem]

Re: Vizio 60" E601I-A3 no display have sound

I dont get any voltage at all - maybe 0.1v. The AO4854 is wired very similarly to this schematic - https://cdn.badcaps-static.com/pdfs/...436c6584b8.pdf

What voltage do you get between pin 5 and ground in the working board? Also it seems like pin 8 is connected to 12v supply.

I think the MAX17140 IC is supposed to provide the 5v supply through the route i marked in the attached picture - can you confirm with the working board. Thanks.

[ecking767]

Re: Vizio 60" E601I-A3 no display have sound

I dont get any voltage at all - maybe 0.1v. The AO4854 is wired very similarly to this schematic - https://cdn.badcaps-static.com/pdfs/...436c6584b8.pdf

What voltage do you get between pin 5 and ground in the working board? Also it seems like pin 8 is connected to 12v supply.

I think the MAX17140 IC is supposed to provide the 5v supply through the route i marked in the attached picture - can you confirm with the working board. Thanks.

On the working board pin 7 and 8 there was +12v and on 5 and 6 was +1.2v.
unfortunately i don't have this Vizio 60" on my work bench. But I have another on on the way with the same problem. I'm not sure on what this 1.2v is supplying power to or which components? I'm started tracing the board and couldn't find continuity to any I.C.s

[shameem]

Re: Vizio 60" E601I-A3 no display have sound

Based on further exploration and brief comparison with a working board i have narrowed it down to the component outlined in the picture. The points marked in blue have continuity on the bad board and don't have continuity on the good board. The markings for this transistor -
COXA (16 printed sideways) on the bad board
CO5A (16 printed sideways) on the good board

Could anyone please point me to a datasheet for this component? Thanks

[ecking767]

Re: Vizio 60" E601I-A3 no display have sound

Based on further exploration and brief comparison with a working board i have narrowed it down to the component outlined in the picture. The points marked in blue have continuity on the bad board and don't have continuity on the good board. The markings for this transistor -
COXA (16 printed sideways) on the bad board
CO5A (16 printed sideways) on the good board

Could anyone please point me to a datasheet for this component? Thanks

I check the same part on my T-CON, and I concluded that these are MOSFET, and you may have did an in circuit test. When you applied your test lead to the gate you cause the drain and source to closed. check again. I will do more signal tracing today on where this +1.2 volts is going

[shameem]

Re: Vizio 60" E601I-A3 no display have sound

I thought so too - i removed the transistor from the board and same result. The center tab and another pin is shorted. Do you know an equivalent transistor i can substitute on the board? Thanks

I think 1.2v is the core voltage for the T Con LVDS chip (Novatek)

I have attached an image of the transistor - that is as close i could go without macro lens....

[shameem]

Re: Vizio 60" E601I-A3 no display have sound

Could this be the transistor?

[ecking767]

Re: Vizio 60" E601I-A3 no display have sound

I thought so too - i removed the transistor from the board and same result. The center tab and another pin is shorted. Do you know an equivalent transistor i can substitute on the board? Thanks

I think 1.2v is the core voltage for the T Con LVDS chip (Novatek)

I have attached an image of the transistor - that is as close i could go without macro lens....

shameem, I remove them both transistors and only one of the two transistor were shorted. I upload a picture of " X0VV" which seem to be a MOSFET. The "COXA 16" is shorted from the center pin to the right pin. I'm getting a reading in both direction from the center tab and the left pin. I didn't find any datasheet on either.

[dudaman]

Re: Vizio 60" E601I-A3 no display have sound

hi guys,
any news on this transistor part number? im in the same boat.

thanks in advance

[magl555]

Re: Vizio 60" E601I-A3 no display have sound

Hi, I have the same problem with this TV, I have backlight, I sound (tested with HDMI), but I have no image.

Now change the T-con and Master card, but I have not managed,

Someone who can help me.

[audiofreak19]

Re: Vizio 60" E601I-A3 no display have sound

Mag you could have a bad panel. Test by removing one of the t con ribbons and turn the tv on to see if you get image on half of the screen. Then plug it back in and take the other one out and turn tv on to see if you get image on the other side of the tv. If you got a image on one side and nothing after you flip flopped the cables then the panel has a short in it.

[selldoor]

Re: Vizio 60" E601I-A3 no display have sound

This may be relevant

http://hdguru.com/vizio-issues-a-rec...led-lcd-hdtvs/

[ecking767]

Re: Vizio 60" E601I-A3 no display have sound

Hi, I have the same problem with this TV, I have backlight, I sound (tested with HDMI), but I have no image.

Now change the T-con and Master card, but I have not managed,

Someone who can help me.

What is the part number of your T-CON board?

if its P/N: RUNTK5261TPZE you will still have a blank screen

[fixerupper75]

Re: Vizio 60" E601I-A3 no display have sound

I have vizio 601i-a3 has video and sound but NO BACKLIGHT. Is this the issue Vizio is recalling.

[fixerupper75]

Re: Vizio 60" E601I-A3 no display have sound

Anyone got any feedback on this issue???

[Wackyracer]

Re: Vizio 60" E601I-A3 no display have sound

I have vizio 601i-a3 has video and sound but NO BACKLIGHT. Is this the issue Vizio is recalling.

I have one same problem. Has audio, video...the backlit goes on for a split second at bootup. There are 3 possibilities...1) power supply, 2) the cables to the leds, 3) the leds themselves

I tried 2 different power supplies ( the one in the set and second one purchased used and supposed to be good as per the seller)...same problem.

I have no voltage at the led connector on the PS, at the led connector on the cable my dvom shows open and my transistor tells me no component connected.

This leaves me to believe the led back lights are bad or partially bad causing the back light circuit to shut down.

The leds are part of the panel assembly...might not be easy to find and look like a PITA to change.

Can someone test the voltages on the power supply at the led connector...mine are just about zero (less then 1v).

Or supply me with a service manual and or schematic?

[Wackyracer]

Re: Vizio 60" E601I-A3 no display have sound

I have vizio 601i-a3 has video and sound but NO BACKLIGHT. Is this the issue Vizio is recalling.

No, they are replacing the T-con board that fails based on serial number of your TV .

The t-con controls video to the LCD and not the backlight....feel free to call vizio and complain.

Google you model for all the details.

[Ltank]

Re: Vizio 60" E601I-A3 no display have sound

I had one that had backlight and sound but no picture. The screen had light blue tint. I called Vizio . They will ask you for the sets S.N. They have a recall on sets that have a recall on some sets. This one was not but they decided to warranty it. They extended the warranty to two years on these sets

[satinser]

Re: Vizio 60" E601I-A3 no display have sound

Common problem with Sharp Tcons now failing in big numbers. The Gamma ic has failed and afraid not normally repairable. When Gamma ic fails voltage will be present on both sides of fuse of Tcon but no output voltage will be present. Not worth wasting time looking any further change the Tcon.