vizio E320-A1 not working

[mhoward]

I plug the tv in white light blinks lower left then goes out
I can push the power button and light will come on steady and stay on
but nothing else happens
I have tested the power at out put plug and they match the stated voltages next to plug

I also have seen that they have problems with voltage regulators and to of them have an out put of 3.3 volts with a part number of 17-33
and according to data sheet I found it should be 3.3 v
one other slightly lager one part number 1234dg or 1084 has 3.2 volts out
connected to another one 912T63 that has 3.3 volts in and 1.19 volts out

is there anything else I can check or would it be easier to replace main board which I think is bad

the video board is 715G5660-M0E-000-004K

thanks for any help

[retiredcaps]

Re: vizio E320-A1 not working

one other slightly lager one part number 1234dg or 1084 has 3.2 volts out
connected to another one 912T63 that has 3.3 volts in and 1.19 volts out

Assuming your multimeter is accurate, both the readings above are out of specification and could be causing your problem. See

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

as to why.

[mhoward]

Re: vizio E320-A1 not working

okay I have retested them

1084
1234DG
pin 1 2.05 volts
pin 2 3.3 volts
pin 3 5.23 volts

connected to the out put of first one is

0283
912T63
pin 1 ground
pin 2 1.19 volts
pin 3 3.3 volts

25D
17-33
pin 1 ground
pin 2 3.29 volts
pin 3 5.25 volts

25D
17-33
pin 1 ground
pin 2 3.29 volts
pin 3 5.23 volts

[retiredcaps]

Re: vizio E320-A1 not working

0283
912T63
pin 1 ground
pin 2 1.19 volts
pin 3 3.3 volts

The above is correct. I was looking at the wrong datasheet. The correct one is

https://cdn.badcaps-static.com/pdfs/...25e4855b99.pdf

which specifies it is a fixed 1.2V regulator.

25D
17-33
pin 1 ground
pin 2 3.29 volts
pin 3 5.25 volts

25D
17-33
pin 1 ground
pin 2 3.29 volts
pin 3 5.23 volts

The above two are good. When you reort just 3.2V it implies 3.200000V. Obviously, when you report 3.29, you can see what a difference it makes.

[mhoward]

Re: vizio E320-A1 not working

okay thanks
but any ideas what else I could check as to why it will not turn on at this point

[retiredcaps]

Re: vizio E320-A1 not working

On the connector from power board to the main board, measure the DC voltages and report them like this.

pin 1 = legend says 12V, I get 11.99V
pin 2 = etc

[mhoward]

Re: vizio E320-A1 not working

okay I have

pin legend reading

13 on/off 247.5 ohms to ground
12 Dim 6.78 ohms to ground
11 +12v 12.38v
10 +12v 12.38v
9 GND 0.0 ohms to ground
8 GND 0.0 ohms to ground
7 GND 0.0 ohms to ground
6 +24v 24.75v
5 +24v 24.75v
4 ps_on 4.83v
3 5.2v 5.25v
2 5.2v 5.25v
1 nc

the pin 13 never seems to see any voltage not sure if it will at some point or not, same with the 12 pin for dim

thanks

[retiredcaps]

Re: vizio E320-A1 not working

13 on/off 247.5 ohms to ground
12 Dim 6.78 ohms to ground

Pin 13 is likely backlight on/off. If there is no voltage, the backlight will not come on. The main board controls this functionality.

Hookup a source (like a DVD player) and see if you have picture and/or sound.

[budm]

Re: vizio E320-A1 not working

"13 on/off 247.5 ohms to ground
12 Dim 6.78 ohms to ground"
The readings are in Ohms instead of Volts, what are the voltage reading on these two pins?

[mhoward]

Re: vizio E320-A1 not working

there is no voltage on the pins 12 and 13

I also hooked up the TV to my cable box by way of the RCA audio and video plugs
and I have nothing no sound at all

[Cosmo66]

Re: vizio E320-A1 not working

Does the backlight come on?

[mhoward]

Re: vizio E320-A1 not working

no the back light does not come on

[budm]

Re: vizio E320-A1 not working

Those two signals:bl_on (or ON/OFF) and the backlights dimming control are generated by the main board, that is why there is no backlights even though you have 24V feeding the inverter board. The PS_ON signal from main board is working otherwise you will not get the 24VDC for the inverter board. You will have to work on the main board next, I am not sure if this VIZIO series is one of those with the bad EEPROM pronblem or not.

[ecking767]

Re: vizio E320-A1 not working

this Vizio 32" has LED back-lighting. you need to upload pictures of the power supply and LED driver board section.

[mhoward]

Re: vizio E320-A1 not working

here is some pics of the power supply and main board

[mhoward]

Re: vizio E320-A1 not working

does anybody have any other ideas?

[bmolke]

Re: vizio E320-A1 not working

mhoward did you ever figure this one out? I have the same issue

[mhoward]

Re: vizio E320-A1 not working

no I ended up just replacing the main board

[Beester]

Re: vizio E320-A1 not working

I have the exact same issue and same TV. I wish there was a known solution to the problem.

[mhoward]

Re: vizio E320-A1 not working

the board was $69 on ebay and the guy gave me $20 back for giving him the old one