Y sus test - ebr31650403

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Re: Y sus test - ebr31650403

Hi tom its left to right and I must of re-seated the dam things 10 times and still the same

[tom66]

Re: Y sus test - ebr31650403

Can I get a picture then?

[truep]

Re: Y sus test - ebr31650403

If you were in the US, I could ship you one! I have a working EBR39522801 sitting here in front of me That I was about to put on Ebay for $50. I don' know about shipping international and it would probably be too expensive anyway.

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Re: Y sus test - ebr31650403

Can I get a picture then?

I will try tomorrow mate and get pics, the brother and I had a little bit of a falling out..thats why I couldnt get the pictures in the first place.

Before I get pictures Tom, is there anyway of testing which ribbon is faulting, ie

Connect ribbon 1 and see the results and so on down the line until all ribbons are connected and working fine or do they all need to be connected and its just a trial and error exercise

Cheers Truep, but the y sus is fine now.

[tom66]

Re: Y sus test - ebr31650403

Each ribbon drives 1/N of the panel e.g. 10 ribbons on 1080p panel each drives 108 lines, so if you know from the top or bottom where the fault is, it will correspond to the ribbon at the same position.

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Re: Y sus test - ebr31650403

Each ribbon drives 1/N of the panel e.g. 10 ribbons on 1080p panel each drives 108 lines, so if you know from the top or bottom where the fault is, it will correspond to the ribbon at the same position.

Thank you, my only two other concerns is the tv started shutting down and restarting....would an unseated ribbon cause this to happen and the bottom part with the purple speckles and more of a grey colour

Is there any possible chance this buffer is bad and I am fighting a lost cause

[tom66]

Re: Y sus test - ebr31650403

A bad Y-sus can kill the buffer, it's possible it could also have wounded it.

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Re: Y sus test - ebr31650403

Right ok, for the sake of £15-£20 I am going to take the gamble and buy a new one.

Whilst your here Tom can you just help my learning curve (and maybe others) on this pic parts of the board are labelled SUS-UP SUS-DN and HS2 ermmm what are these and what do they do/mean/control

[tom66]

Re: Y sus test - ebr31650403

They're in parallel.
SUS UP connects output to Vs.
SUS DN connects output to GND.

A picture will help determine if fault is actually with buffer.

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Re: Y sus test - ebr31650403

They're in parallel.
SUS UP connects output to Vs.
SUS DN connects output to GND.

A picture will help determine if fault is actually with buffer.

Thank you, I think I will get the new buffer because knowing me I will spend 6 hours reseating and achieve nothing, if the new buffer is doing the same thing then I will know it is me at fault

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Re: Y sus test - ebr31650403

Hi

Just put the new buffer in and no difference, I am either getting white bands or black bands that dont light up, here is a pic

I hope it isnt another ebay special that came from a popped screen

[tom66]

Re: Y sus test - ebr31650403

Is the image different at all, or is it exactly the same as it was?

How to test Y-buffer
https://www.youtube.com/watch?v=51SZsfH60EY

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Re: Y sus test - ebr31650403

Yes mate the picture is different, I can make the white lines dissappear but then I have just a black screen..its like there is no inbetween, i can make the whole screen white but then the tv shuts down

If I make the whole screen dark I get no OSD and it does look like the screen isnt working at all

Cheers for the video link, I have already watched it..it is embedded in the grey matter forever more and did the exact test before fitting

[tom66]

Re: Y sus test - ebr31650403

Yes mate the picture is different, I can make the white lines dissappear but then I have just a black screen..its like there is no inbetween, i can make the whole screen white but then the tv shuts down

If I make the whole screen dark I get no OSD and it does look like the screen isnt working at all

Cheers for the video link, I have already watched it..it is embedded in the grey matter forever more and did the exact test before fitting

Many of these newer TVs have thin plasma panels, which means if the screen is smashed while it is energised there is a good chance the buffer will fry.

Your symptoms do match those of a bad Y-buffer.

Did you use a multimeter with fast continuity, like mine, to do the test? Or just use ohms?

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Re: Y sus test - ebr31650403

I very much doubt my DMM is anything like yours and I couldnt tell you if it has a fast continuity...I ddnt test in ohms..shall I do it that way and what am I looking for