Samsung ue49k6300ak

[dick_barton]

Re: Samsung ue49k6300ak

What voltage do you have on both sides of the Tcon smd fuse "F1"

[Davi.p]

Re: Samsung ue49k6300ak

HI, first of all i guess one very fast spike of voltage has hit your house, fast enough to pass over the entire PSU without damaging glass FUSE/Varistor. Then if you want to make things seriously for me you have to test voltages on tcon 'cause i suspect some robbers have cheat you and you bought a bad tcon. IF you want to put extra efforts of work on this pubblish a clear tcon picture with all serigraphy well visible, then i try to guide you through testing, if not you can buy a new one asking for sure to have it from a broken panel tv. Bye

[oxonater]

Re: Samsung ue49k6300ak

Hi again

Ok so I have checked all the voltages on PSU and all were present and correct apart from the od/ud connector (not sure what this is).

Also with regards to the mainboard and T-con testing I just replaced them with known working ones (although that sometimes is not the case when buying used items).

Again pretty lazy I did check the mainboard for power and that appear to match the power supply voltages. T-con doesn't appear to have a fuse as such that I could see I have uploaded a pic of it and maybe could be pointed in the right direction for testing.

Also did notice when running my finger along the TV bezel at the bottom had some weird colours that appeared.

Other than that the TV still does the same can hear sound no display it's back together at mo so not to sure when I will look at it again!!!

[vinceroger69]

Re: Samsung ue49k6300ak

fuse is above white connector on left hand side marked f1 32v

[Davi.p]

Re: Samsung ue49k6300ak

There are some testpoints, test with and without all connected:
VON, VSS, 1.1V, 3,3V, AVDD, HAVDD

[PedroBorges9]

Re: Samsung ue49k6300ak

Hi guys, I just got a tv with the same problem. My HAVDD point does not have any voltage with the tv on, is that normal?

[Davi.p]

Re: Samsung ue49k6300ak

I retire my guess about bad tcon, in theese newer models ususally something goes bad in the screen section, if one is lucky enough there can be a little cap broken on the small border boards.

[budm]

Re: Samsung ue49k6300ak

Hi guys, I just got a tv with the same problem. My HAVDD point does not have any voltage with the tv on, is that normal?

That is not normal.
Are getting 12VDC on both ends of the fuse on the T-CON board when TV is turned on?

[PedroBorges9]

Re: Samsung ue49k6300ak

Yes I'm getting voltage of the f1, about 15v on each side.

[budm]

Re: Samsung ue49k6300ak

Yes I'm getting voltage of the f1, about 15v on each side.

15V with ref to chassis ground?
Disconnect both ribbon cable between LCD panel and the T-CON and see if you will any Voltage you have listed.
BTW, are you sure your DC Voltmeter is OK and accurate since there is no power supply that generates 15VDC so I do not expect to have 15VDC feeding the T-CON?

[Davi.p]

Re: Samsung ue49k6300ak

15V on a tcon fuse it can't be heard....!

[nomoresonys]

Re: Samsung ue49k6300ak

Check some other stuff with your meter, new 9 volt battery or other known voltages.

[PedroBorges9]

Re: Samsung ue49k6300ak

Got a new t-con board to no avail. I noticed that if I unlock and wiggle the flatcable on the motherboardside I can see a bit of the bottom of the display with an arrow pointing down and all.

[PedroBorges9]

Re: Samsung ue49k6300ak

Sorry the F1 is reading 12,74 on both sides with both bottom flatcables disconnected or connected it does't matter.

[nomoresonys]

Re: Samsung ue49k6300ak

.

[budm]

Re: Samsung ue49k6300ak

So if the two cables from T-CON to the LCD panel are not connected, you still do not see any Voltages at these test points, VON, VSS, 1.1V, 3,3V, AVDD, HAVDD on the T-CON board?
You never tell us what you get on the old T-CON board when the two ribbon cables to the LCD panel are not connected either.

[PedroBorges9]

Re: Samsung ue49k6300ak

Reporting back.
point - Ribbons Connected - Ribbons Disconnected
1.1v - 1.1v - 1.1v
2.5v - 2.5v - 2.5v
3.3v - 3.3v - 3.3v
AVDD- 167.5mv - ~167.5
HAVDD- 0 - 0
VON - 177.6mv - 200mv
VSS - 100 -> 55mv - 100 -> 33.9mv

[budm]

Re: Samsung ue49k6300ak

Are these the reading of old and new T-CON boards?
So far it is missing important Voltages.

[PedroBorges9]

Re: Samsung ue49k6300ak

This is with the new one. The old one was the same I think. Which voltages are missing?

[budm]

Re: Samsung ue49k6300ak

This is with the new one. The old one was the same I think. Which voltages are missing?

These Voltages:they should be way lots higher, for example the AVDD should be 15 ~ 20 VDC.
AVDD- 167.5mv - ~167.5
HAVDD- 0 - 0
VON - 177.6mv - 200mv
VSS - 100 -> 55mv - 100 -> 33.9mv