Samsung LE37A556P1F blue tint to the screen?

[Loz2212]

Hi guys,

As the title says, the TV has a blue tint to the screen, really quite bad as well, it's unwatchable. I've just put a new T-Con (well, refurbished with new gamma chip) into it as well. I'm not entirely sure what the fault was before, it was probably 12 months ago when I looked, I just had a record that it needed a T-Con board so ordered it up. Not sure whether the picture was blue before

Any ideas? Knackered LCD ?

Thanks.

[dick_barton]

Re: Samsung LE37A556P1F blue tint to the screen?

Any pictures to show the problem?

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

Pic of what the screen looks like.

Apologies for it being upside down and dusty lol. The picture is also very dark.

[Hamie]

Re: Samsung LE37A556P1F blue tint to the screen?

Probably a faulty AS15-F chip on the TCON.

Testing gamma voltages would confirm.

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

I've just purchased a refurbished one and he said that had been changed

How can I test these voltages please Hamie?

[Hamie]

Re: Samsung LE37A556P1F blue tint to the screen?

See pics.

Test points for gamma.

Post results.

Eg:

vgma1 = 15.2
Vgma2 = 14.7

Etc
Etc

[Hamie]

Re: Samsung LE37A556P1F blue tint to the screen?

The problem with the refurbished board isn't the fact that he's not changed the chip. It's probably down the fact that 2 in 10 (roughly) of brand new AS15 chips tent to be faulty.

I bought 10 recently and 3 of them were faulty straight out the box.

So if he's just changed the chip and not had a working tv to test its probably not the sellers fault. However it might be worth going over his solder joints and make sure they are all connected.

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

Vgma 1 = 15.29
Vgma 2 = 15.23
Vgma 3 = 15.08
Vgma 4 = 12.26
Vgma 5 = 11.46
Vgma 6 = 10.51
Vgma 7 = 9.95
Vgma 8 = 9.68
Vgma 9 = 8.18
Vgma 10 = 7.85
Vgma 11 = 7.79
Vgma 12 = 6.54
Vgma 13 = 6.50
Vgma 14 = 6.22
Vgma 15 = 4.98
Vgma 16 = 4.76
Vgma 17 = 4.29
Vgma 18 = 3.51
Vgma 19 = 2.84
Vgma 20 = 0.49
Vgma 21 = 0.36
Vgma 22 = 0.31

[dskall]

Re: Samsung LE37A556P1F blue tint to the screen?

Looks like a fail

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

Definitely? Want to be certain before I send it back. Thanks

[dskall]

Re: Samsung LE37A556P1F blue tint to the screen?

Here is the gamma checker. You can use. Has your numbers in it.

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

Apologies. I'm really not an excel user. No idea how to even use that haha. I tried inputting my voltages in but nothing happened.. As I say, I've never really used excel before. Is there any other way to test it? Thanks

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

If anyone could lend a hand with that excel document, that would be great

Guy on Ebay is telling me he definitely checked it before it was dispatched.. I'm not sure what else it could be now.

Thanks

[vinceroger69]

Re: Samsung LE37A556P1F blue tint to the screen?

ive just put your readings in the spread sheet and it does say fail

[Loz2212]

Re: Samsung LE37A556P1F blue tint to the screen?

Thank you Vince. Appreciate that a lot!

[noledud]

Re: Samsung LE37A556P1F blue tint to the screen?

Just search for AS15 repair service on ebay there are a few sellers offering it as a mail in service