Samsung LN46A500T1F Color Distortion problem

[inb4tehlulz]

Re: Samsung LN46A500T1F Color Distortion problem

Also, how do these ribbon cables work? They look like the tabs should be squeezed, but no amount of gentle pressure seemed to move them and I don't really want to break them experimenting.

[LN-46-A-500]

Re: Samsung LN46A500T1F Color Distortion problem

Hello

In need for some advice: got this same problem (solarization picture color) need to identify either is IC or Tcom. Have not opened it yet. Tried the first usual suspects:
1. Picture diagnostic test
2. Factory reset
3. Firmware upgrade? (Haven't found where to obtain it)

Have some pictures but I'm on a mobile device and have bad time trying to upload as attachments so I uploaded them to a shared folder, here:https://www.dropbox.com/sh/791317y81...8Mcg0HXqa?dl=0

Any reply about this it will be really appreciated.

Best regards

[budm]

Re: Samsung LN46A500T1F Color Distortion problem

I would check the DC GAMMA Voltages at the test points on the T-CON board.

[LN-46-A-500]

Re: Samsung LN46A500T1F Color Distortion problem

Thanks flr the reply: will try to do that, however I think Im looking for a spare, compatible t-con board to test if is that part then find/buy a new/used one.

[LN-46-A-500]

Re: Samsung LN46A500T1F Color Distortion problem

Hello, I'm waiting for a replacement board. Meantime I need to found one or more of the clipping that attach the two ribbon cables. Pics for clicks:

[tom66]

Re: Samsung LN46A500T1F Color Distortion problem

I don't think you can buy those separately - you have to buy a whole new T-con board.

[LN-46-A-500]

Re: Samsung LN46A500T1F Color Distortion problem

Right. I'm ordering a new board. But it does include new ribbon retainers (the brown stuff there that hold down the ribbon contacts) I mean if then OK I should be more careful removing them. Just didnt figured out and accidentally broke one retainer (or it just was toast due to age / heat and when I forced out just came apart) anyhow, I'm waiting for the seller to confirm that have the board on stock and if they can issue the broken retainers (or how they're named). Any reference on how to successfully put them back on a new board? Hope I can fix this HDTV. Can't afford a new TV right now or on the next months, maybe years.

[LN-46-A-500]

Re: Samsung LN46A500T1F Color Distortion problem

Yes! After two months the new board finally arrived. Hopefully had the ribbon 90° clips with it so replacement was easy. Turned on and everything seems right, no more solarized colors. I'm testing the board watching a couple Premier League matches. I thank you all for the help. If I did not found this forum I was lost with a non working HDTV. Thanks

[budm]

Re: Samsung LN46A500T1F Color Distortion problem

Thanks for the repair follow-up.

[hiroo]

Re: Samsung LN46A500T1F Color Distortion problem

My Samsung LN46A500T1FXZA has developed this color distortion:



I measured the voltages on my TCON board: (These are referenced to the large copper sections on the corner, which I took to be ground.)

1 15.17
2 13.05
3 12.22
4 11.34
5 10.93
6 10.55
7 10.1
8 9.47
9 8.88
10 6.02
11 2.65
12 5.03
13 4.84
14 4.58
15 4.19
16 3.32
17 2.5

Any recommendations on whether these voltages are the cause and whether changing out the chip would help?

Pictures of the board and chip:

[budm]

Re: Samsung LN46A500T1F Color Distortion problem

Bad GAMMA IC AS19 (same common failure as AS15).

[hiroo]

Re: Samsung LN46A500T1F Color Distortion problem

Bad GAMMA IC AS19 (same common failure as AS15).

I ordered an AS19 replacement chip but noticed that repair kits advertised for this problem/board also include a surface mount fuse and resistor. Are those usually necessary?

[tom66]

Re: Samsung LN46A500T1F Color Distortion problem

No, not unless all voltages are nearly zero, which is a very uncommon fault.

[hiroo]

Re: Samsung LN46A500T1F Color Distortion problem

Ok, I had problems with pads lifting as well. I lost 6 pads in the process. (Should have had more patience with the heat gun)



Anybody think this is worth trying to jumper all those connections? The three adjacent pins seem pretty difficult given how small these pins are.

What kind of wire is good for this sort of thing? Any tips on how to solder wire to a pin with only two hands?

There is also a stubborn solder-bridge between two pins (4 and 5 from the bottom on the right side) that I can't get out using solder wick. Any advice on that?

[laxdad]

Re: Samsung LN46A500T1F Color Distortion problem

Hey guys, I have a Samsung LN46A500T1FXZA and I believe the Tcon board is bad. Below are the readings I've taken after reading a few posts. The part number of the Tcon board is V520H1-C06. I've gone ahead and checked out jimmyshop and I don't see them getting the part in any time soon. /:
T1 15.15
T2 13.27
T3 12.38
T4 11.85
T5 11.51
T6 11.9
T7 12.52
T8 9.96
T9 9.97
T10 6.37
T11 6.91
T12 5.61
T13 4.98
T14 4.69
T15 4.37
T16 3.79
T17 3.12
Can someone please verify whether or not my Tcon board is bad please?

[budm]

Re: Samsung LN46A500T1F Color Distortion problem

It is bad.

[laxdad]

Re: Samsung LN46A500T1F Color Distortion problem

Thanks Bud! Any suggestions where I should buy my replacement by chance?

[budm]

Re: Samsung LN46A500T1F Color Distortion problem

The T-CON board or the IC? I get my IC from EBAY, or replacement boards/ICs from shopjimmy.

[laxdad]

Re: Samsung LN46A500T1F Color Distortion problem

The board. Im trying to avoid long down times as I know I'd jack up the repair.

[matt526]

Re: Samsung LN46A500T1F Color Distortion problem

same TV here with a very dim picture and
My T-Con voltage is: I think it looks good but not sure.
Volt 1 -12.65
Volt 2 -12.65
Volt 3-12.64
Volt 4 -12.64
Volt 5 -12.65
Volt 6 -12.63
Volt 7 -12.63
Volt 8 -12.62
Volt 9 -12.62
Volt 10 - 13.91
Volt 11-13.90
Volt 12-13.89
Volt 13-13.90
Volt 14-13.90
Volt 15-13.90
Volt 16-13.92
Volt 17-14.08
Volt 18??19.27

maybe it could be the Backlight Inverters. Any idea on how to test those and what volage I should be getting?