Sony KDL46z4100 red hazy picture

[JBVeldkamp]

Re: Sony KDL46z4100 red hazy picture

Hi all! It seems from other posts that this is quite the popular problem to have right now! It also seems that TCONs are basically impossible to find without paying ~$200!

I did find an advertisement on ebay for a guy that does circuitboard (specifically said he does TCONs) repair for ~$50. Does anyone have any experience with repaired boards? In light of the fact that we can't find a simple modular replacement, would this be a decent way to go?

Thanks!

[tom66]

Re: Sony KDL46z4100 red hazy picture

If he is repairing the t-cons, he's probably replacing this IC. You can test it, if you have a digital multimeter.

[JBVeldkamp]

Re: Sony KDL46z4100 red hazy picture

Ah, ok. I will borrow one from my neighbor. What sort of signals am I looking for?

OK and one more problem... sorry I am being overly needy today!! When messing with the tcon, I managed to tweak the little 1" x 1.5" ribbon cable that attaches the TCON to the screen. Probably need to get a new one, but can't find a part number. Anyone have any idea what this part number is, and / or a good online shop that might have a replacement?

Thanks!!

[tom66]

Re: Sony KDL46z4100 red hazy picture

Take a close picture of that area and I or someone else will highlight the area.

OK and one more problem... sorry I am being overly needy today!! When messing with the tcon, I managed to tweak the little 1" x 1.5" ribbon cable that attaches the TCON to the screen. Probably need to get a new one, but can't find a part number. Anyone have any idea what this part number is, and / or a good online shop that might have a replacement?

You will need to ask someone who has broken apart this TV to see if they kept those cables, they are rarely stocked.

[JBVeldkamp]

Re: Sony KDL46z4100 red hazy picture

It seems that my trend of not making my life any easier continues! OK, I'll continue to search around for those cables...

Attached are the close ups of the IC circuit from front (and back if needed)!

[tom66]

Re: Sony KDL46z4100 red hazy picture

Above that chip, do you see the points marked VGMA1 VGMA2...VGMA12?

[JBVeldkamp]

Re: Sony KDL46z4100 red hazy picture

Got it... think those are the solid points opposite the "hollow" points opposite CG16-CG27, with the "grey" square circuits in between?

[tom66]

Re: Sony KDL46z4100 red hazy picture

Yeah... those gold points are called test points. The voltage on there, with the board installed and the TV powered up, can be tested. Red probe on each, black probe on the chassis of the set. From VGMA1 to VGMA12 the voltage should either increase or decrease monotonically. i.e. there should be no dips or spikes in between. Also it should range from around 0V to around 15V.

[JBVeldkamp]

Re: Sony KDL46z4100 red hazy picture

OK sounds good. As I have it pulled off right now, any way to test without reinstalling; or it needs power going through it to work?

Thanks!

[tom66]

Re: Sony KDL46z4100 red hazy picture

It needs power unfortunately.

[JBVeldkamp]

Re: Sony KDL46z4100 red hazy picture

OK, I'll hook it back up and see what I can find! Thanks!!

[cwmcobra]

Re: Sony KDL46z4100 red hazy picture

Are there similar test points on this board?

[tom66]

Re: Sony KDL46z4100 red hazy picture

Possibly, any chance you can take a higher resolution photo, or perhaps four smaller ones of each corner?

[cwmcobra]

Re: Sony KDL46z4100 red hazy picture

Here you go; the front of the T-Con board. I didn't take the thermal pads off because they seem quite fragile. But if I need to, let me know and I will. If you need to see the back of the board, let me know.

Thanks!

Chuck

[eki912]

Re: Sony KDL46z4100 red hazy picture

Got a package from China...... was really worried what is inside.
The board was just like mine ! Started to put it back in, with shaking hands...
Eventually got it all back together, no screws left over.
Slowly powered it up, and........
It works !!!!!!!
The T-Con board was bad !

So guys , a BIG thank you to all !
You gave me the idea, what to do, and pointed me to the right direction.
Alone, I would have NEVER had the courage to open the cover. Let alone take a board out from inside of the unit !

I am a happy man now ! Less than 100$ , and our old Sony is back in operation ! I think I paid less than a shop charges for giving an estimate !

Keep up the good work !

[budm]

Re: Sony KDL46z4100 red hazy picture

Great news, I hope you put all the thermal pads back in place.

[cwmcobra]

Re: Sony KDL46z4100 red hazy picture

Congrats! Wish I could find a reasonably priced T-Con for my set that might get it going again. Where did you order from? Perhaps I can see if they have one for my TV.

Thanks,

Chuck

[eki912]

Re: Sony KDL46z4100 red hazy picture

I ordered it fom the company, whose site was linked here. Somewhere earlier in thi thread, or was it another thread? Anyway, on that message, the picture of the problem was identical as my problem picture was, as was the T-Con board. I couldn't find that board anywhere else.

http://www.wisiny.com/

I was a bit worried, when I saw where my payment went...

But everything turned out OK!

Thanks to them as well !

I hope it works now for another 5 years, being from 2008. A surprisingly short lifespan for a Sony TV, I have to say.
My previous Bravia lasted 21 years, and was still working, when it was replaced by a flat one.

[eki912]

Re: Sony KDL46z4100 red hazy picture

Oh, and it came all pads etc fitted, just like in my original one.

The biggest issue was getting those flat ribbons back in their holders, the 2 on top of board.
Taking the long metal piece with holes in it out helped a lot.

[eki912]

Re: Sony KDL46z4100 red hazy picture

Still happy !

Watched it last night, and all works OK.
Sadly TWC no longer shows anything without a box, which I have never had. And will not get.
Was feeling miserable for a while.... but after a short think, installed a 6 feet long wire to antenna plug, atteched it to venetian blind
and chose "antenna input" from menu and pressed "autotune" and....
after about 10 mins more than 50 channels ! Over the air ones. Local news etc and some in HD !
Enough for me, as I use Netflix and other internet sources anyway.

Should I throw the broken T-Con away? Or is there a place who might wan't to fix it ?