Samsung UN55ES550F Tcon Fuses

[Renovator]

Re: Samsung UN55ES550F Tcon Fuses

The list:

VGMA 1 11.26
VGMA 2 9.53
VGMA 3 8.96
VGMA 4 8.55
VGMA 5 8.28
VGMA 6 7.99
VGMA 7 7.78
VGMA 8 7.58
VGMA 9 6.23
VGMA10 5.43
VGMA11 3.63
VGMA12 2.66
VGMA13 4.05
VGMA14 3.35
VGMA15 2.09
VGMA16 3.85
VGMA17 3.04
VGMA18 0.37


There was no input connected, so it auto shutdown during the run.

I let it stabilize after reboot and read the exact same values.

The picture above captured more light than one would see.

IOW's these images are real dark, with no green. Not solarized as most gamma examples about the interwebs.

____

I'm not going to have an IC for gamma, am I?

Do Those traces run to the processors with the funky heat sinks?

[nomoresonys]

Re: Samsung UN55ES550F Tcon Fuses

Can you verify model number your sure it's UN55ES550F?

[budm]

Re: Samsung UN55ES550F Tcon Fuses

The list:

VGMA 1 11.26
VGMA 2 9.53
VGMA 3 8.96
VGMA 4 8.55
VGMA 5 8.28
VGMA 6 7.99
VGMA 7 7.78
VGMA 8 7.58
VGMA 9 6.23
VGMA10 5.43
VGMA11 3.63
VGMA12 2.66
VGMA13 4.05
VGMA14 3.35
VGMA15 2.09
VGMA16 3.85
VGMA17 3.04
VGMA18 0.37


There was no input connected, so it auto shutdown during the run.

I let it stabilize after reboot and read the exact same values.

The picture above captured more light than one would see.

IOW's these images are real dark, with no green. Not solarized as most gamma examples about the interwebs.

____

I'm not going to have an IC for gamma, am I?

Do Those traces run to the processors with the funky heat sinks?

The Voltages do look bad from 11 to 17.
https://www.badcaps.net/forum/showth...&highlight=VGH

[Renovator]

Re: Samsung UN55ES7100F Tcon Fuses

I never caught that typo.

I am absolutely sure it is not a 550. Looks like I stuck a sister search string in the title.

It's a ES7100.

UN55ES7100F.

(This Tcon is associated a lot with the 46.)


Nice Catch... Thank You

[nomoresonys]

Re: Samsung UN55ES550F Tcon Fuses

One there, don't know what kind of shipping charges there are, looks like you can use a coupon code too, don't know where to find one tho: https://www.tvpartstoday.com/BN95-00...n95-00712a.htm

[Renovator]

Re: Samsung UN55ES550F Tcon Fuses

I was wondering where you were going.

That's very thoughtful.

And I was looking for an acknowledgment that we are now in wonky processor land and give it a rest.

I've had that one in a cart, their ship starts at 14 dollars.

As you probably saw in your board search, darn near all pix show a skewed black flat aluminum heatsink on the proc nearest the test points.

That's not unusual maquiladora hand work. Could be anywhere, but that and the uninstalled other heatsink, means we need a US supplier for returns, because there's a good chance all this banged out in the same shifts are gonna look alike.

Anything with an airgap goes back. That DNie chip may not be a power hog, so it isn't sudden death, they may just degrade over time from the extra heat
_____

I'm still sorta on the fence with this one. If I get a good Tcon and the image is pretty nice except for the directional 'cloudiness', the cost of the Tcon has confirmed the main is OK as well.

The electronic disturbance being uniform screen wide, and the image problem not being represented in any net searches, means I won't offer the main for sale just yet. So worse case is still OK.
____

While it may be a BF run, I think this panel sticker is one for the 8 series as well. So if the clouds are diffuser stack hickies, it may have a pretty decent panel.

I haven't found any cracks. There are no lines, either way.

Anyway, the learning of the Tcon was truly beneficial, and thanks once again.

[Renovator]

Re: Samsung UN55ES7100F Tcon Fuses

I decided to wander out further on the diminishing return limb, and obtained another Tcon, with heatsink seated.

It made a significant change, but there is more to be done.

The boot screen with 'Smart TV' has always been fine and still is.

Now, the OSD menus are also displayed properly. (Previously they also showed the dark posterization.)

Now I have what more nearly looks like other solarization examples about the net. (These seem less to moderate in intensity.)

It is not localized. It is screen wide.

Yes, I simply installed the new board, and started her up. I have not checked any voltages, yet.

This is my first dance with an LCD, and I have only passing TV image knowledge.

My plan is to go back and hit all the labeled test points from the PSB onward, and adjust any pots to voltages listed.

If need be, I'll have to pull the stand to get to the Tcon, and hit those TP's and then the gamma string to verify this new board quality.

In recap, I have done nothing with the main, but wiggle connectors.

Should I be looking for main problems, related to the 5A Tcon fuses blowing?

[Renovator]

Re: Samsung UN55ES7100F Tcon Fuses

Lovely:

VGMA 1 16.3
VGMA 2 13.8
VGMA 3 13.0
VGMA 4 12.5
VGMA 5 12.0
VGMA 6 11.6
VGMA 7 11.3
VGMA 8 11.0
VGMA 9 9.0
VGMA10 7.9
VGMA11 5.2
VGMA12 3.9
VGMA13 5.9
VGMA14 4.9
VGMA15 3.0
VGMA16 5.6
VGMA17 4.9
VGMA18 0.5

(When I get a better gamma curve from a future board I'll let you know.)

[petehall347]

Re: Samsung UN55ES550F Tcon Fuses

try freezing the gamma ic and see if pic changes for the better

[Renovator]

Re: Samsung UN55ES550F Tcon Fuses

Hmmpf,

Another freeze spray application. (Half joking, I was considering using it on a 20 year old lawn mower starter troubleshoot this morning, but a bag of ice is just as handy for those.)

Point noted.
____

Lord Knows I could be off base here, but I can't find a familiar looking IC like a AS19.

I think the traces run under that sink or both, and they are what may be, probably are, BGA packages. I'm not there yet, skillfully.

But that doesn't mean we shouldn't try Mr. Freeze, just to see if it works.

(I can't get an RMA until Monday anyway.)
_____

Also, I'd like to take a moment to thank the spameister for bumping all those gamma threads, together. There were a couple I missed in my research on this issue and having them all together... well you know.

[Renovator]

Re: Samsung UN55E7100F Tcon Fuses

Woot Woot.

Third board's a charm.

The latest board showed a smooth set of gamma points and the picture looks very nice.

(I do have a 'clouding' issue, that may well be a crushed diffusion stack. I'll do the brussel sprout trick after It's warmed up.)
_____

I tried to freeze the last boards procs, but didn't see any volts change. With those sinks, and their less than stellar adhesive interface, you may need plenty more spray than I would throw at a proof of concept.
_____

Yes, that means I requested an RMA Monday morning. received a prepaid Priority return. I made it to the PO by closing.

Turns out they had shipped my newer board out hours earlier and it was here and installed by Wednesday.
_____

Thanx again.

No landfill for this one.

[budm]

Re: Samsung UN55ES550F Tcon Fuses

Thanks for the follow-up, you never know what you get when the seller claims as working board, but at least the seller back up what they sell.