Vizio Plasma JV50Phdtv10a no picture/no sound

[kkanc]

Sorry I think I posted my question in the wrong spot the other day. This is what I had posted: Hi Tom. Your guide on the troubleshooting of plasma tv's is great. I've learned alot so far but have a great deal more to learn before I'm really up to troubleshooting. At this point I'm probably doing something wrong with the guide. I'm new to this and don't have a great deal of experience troubleshooting boards. I'm more into mechanical. I have a vizio plasma JV50P HDTD10A serial PHLANAH1801xxx The original problem from reading was the sound would go on and then off with a loud noise. Then off and on with the tv. Then would work normal. Did this a few weeks. Now tv would not even turn on. Yellow vizio label would not turn white, no click, no sound. Took off back of tv, read many items on internet, wish I would have found badcaps first. I did see caps on power board were leaking bad. Replaced that board. Was able to then get tv to turn on, yellow vizio turn white and you can hear a click. Still no sound or picture. From what I had read elsewhere, I replaced the main board. I still have no sound or picture. You can hear a slight crackle from speaker when turned on but that's it. I found this website and tried your troubleshooting guide but didn't seem to help pinpoint anything else wrong. I know I must be doing something wrong. I have noticed that I believe there use to be a small red light that could be seen when using the remote, that is no longer doing that. Batteries have been changed and does turn tv on and off, but I have been using side controls of tv during testing. Any other possible tests or retests that I could try. I did check the few fuses that I could find (regular fuses). As I say, I'm not really into board troubleshooting but learning from the posts on badcaps. Thanks, Ken

[tom66]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Please use paragraphs next time.

Can you take pictures of the boards in your TV?

Do you have a digital multimeter?

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Hi Tom,
Sorry about the no paragraphs. Did a copy and paste and it got messed up. I'm attaching photos of the boards so hope that it helps.

With the main board there was one part that wasn't included on the recertified one, it plugged in to the top left of the board and had a wire running down to a bulb type of item below. (its not really named anywhere that I can find).

As for the digital multimeter, I have one but it's not the greatest. If needed I'll have to buy one. Let me know. Thanks, Ken

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Tom, the part that I was talking about that did not come with the recertified control board is marked on this picture. I could not find a name for it on any drawings I've been able to find. Thanks, Ken

[tom66]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

This is your PSU:
https://www.badcaps.net/forum/attach...2&d=1361158532

There is a pin "AC-DET" on PSU to main board connectors, which are labelled. Can you see this pin?

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Picture didn't attach first time, sorry.

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Hi Tom. I didn't see that you posted this morning in between my picture. Sorry.

On the board your talking about I see the connector (I believe) and it has AC-D on one of the pins and DET on another.

attached is the connector.
Let me know what else you need.
Thanks, Ken

[tom66]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

AC-D is the one. Test the voltage here, red probe on the pin (stick it where the wire goes) and black probe on chassis of the TV. If all is well, I expect to see more than 4V.

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Hi Tom. I was able to get the voltage test you were talking about. I also measured the rest of the pin set on that connector as well. The results are:
AC-D is 9.5v
RL-DN is 10.0v
5Vsb is 10.2v
DET is -00.0
V5-ON is 9.9v
5V-D is 0.0v
GND is 0
Hope these make sense to you. Let me know what you would like for me to check next. I appreciate very much all your help.
Thanks, Ken

[retiredcaps]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

The results are:
AC-D is 9.5v
RL-DN is 10.0v
5Vsb is 10.2v
DET is -00.0
V5-ON is 9.9v
5V-D is 0.0v
GND is 0

Your batteries in the multimeter are likely dead/bad. The voltages reported are almost double what they should be.

Change out your batteries and retest.

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

I changed out the 9v battery in my meter. It was down to 8.7v. Put in a new 9v and rechecked the voltages.

The two that changed are:

5Vsb had measured 10.2vac and is now 10.3vac
V5-D had measured 9.9vac and is now 10 vac

All the others are measuring the same as before. The readings were taken with the set on.

I posted pictures in the original request here and thought I had them focused pretty good, but do realize that they are not as close up as possibly needed? Not sure if you would like a more detailed picture of a certain board perhaps?

Please let me know if I need to get another one or take any closer up pictures here for more guidance.

Thanks

[tom66]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

You need to use volts DC not AC.

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Thanks Tom for the direction. Apologize for the mistake.
Retaking the measurement readings are:
AC-D is 4.60vdc
RL-DN is 4.80vdc
5Vsb is 4.95vdc
DET is 0vdc
V5-ON is 4.79vdc
5V-D is 0vdc

All readings taken with tv turned on. Input from cable tv not plugged in at this time.
Let me know what you'd like for me check next. Thanks.

[tom66]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Do you get any VS/VA voltage with VSON at that voltage?

[kkanc]

Re: Vizio Plasma JV50Phdtv10a no picture/no sound

Hi Tom,
I'm not sure where you want the voltage measured at, but I did measure it on the power board connector just above where the other voltages were taken. I attached a picture of the connector/location measurements taken.
With the tv on, and meter set on 500dcv the readings are:
Vs is 189dcv and steady (this is on all three terminals)
Va is 60dcv and steady (on both terminals)

Hope that helps. Thanks.