Samsung LN46A530P1 solarized picture

[splitcrete]

Hi everyone I have this tv that I saved from the land fill . I have read on many threads that the gamma chip will cause this kind of picture, and I checked service menu for main board settings check OK . I have changed the main board as it had a broken antenna input on it. Then I changed the T-CON with one from e-bay. I still have a bad picture. I ordered some gamma chips AS15-s and changed it being careful not to pull off the pads. Now I have the same picture. I have the gamma volts and the power board volts plus pictures. Any help would be appreciated.

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

More Pics.

[tom66]

Re: Samsung LN46A530P1 solarized picture

Which set of voltages is your current & which is your new? First pic is definitely bad, second also looks bad, but not quite as bad.

[tom66]

Re: Samsung LN46A530P1 solarized picture

One other trick: I haven't yet verified it but I think it will work. If you check the REF voltages below the gamma IC, they should (within a few percent) match the VGAMA points.

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

That is the voltage from cn801

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

I'll check the ref points and post results.

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

Here is a picture of the VGAM points compared to the REF points. A close up of the points on the board.

[tom66]

Re: Samsung LN46A530P1 solarized picture

It's hard to be sure, then, they're a close match.

Tomorrow, I'm getting a 37" Sony with a bad AS15 IC, and I will go about comparing REF to VGAMA.

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

I did a 42" Sony with a bad AS15 IC, and had no problems .The picture came right back. So what do you think about my voltages should I be getting a normal picture ?

[tom66]

Re: Samsung LN46A530P1 solarized picture

The voltages look OK, it is possible they are bad but it is close. I do not think the picture would look that bad, if that were the case. So, time to look elsewhere...

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

I already re soldered the LVDS connections. I have tried all the inputs. No cold solder joints
That is the third IC I put on that board. Could it be I got bad ICs from China? Maybe the cable? Where would you start testing tom ? I don't want to part this tv out not knowing if any boards are bad,that just wouldn't be right.

[Alastair E]

Re: Samsung LN46A530P1 solarized picture

What does the set look like--with its original mainboard?

[splitcrete]

Re: Samsung LN46A530P1 solarized picture

It looks the same. I tried changing the settings in the service menu and only gets worse. Maybe I should take the IC off and try a different one. I soldered it on at 600 deg. F , and used 60/40 solder. Should I try a different setting on my station ? I don't want to mess up the pads they are so small and look like they will lift off very easy.