Samsung - LE32A457C1D - screen artifacts

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

Are you getting power to your t-con?

Yes. 12v, 3.3v , 1.5v, 1.0v ,1.2v

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

TV name is Acoustic Solutions (don't know the model) Sn: 6464686 900044I. I suspect that T-con is bad? T-con Nr: 320AA05C2LV0.0
Any help, guys?

[dskall]

Re: Samsung - LE32A457C1D - screen artifacts

Couple of those voltages look low

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

What voltage should be? What points I have to check?
Ps.: Here is another picture what I got after connecting a Tablet to the HDMI port. Here could be T-con problem or not?

[dskall]

Re: Samsung - LE32A457C1D - screen artifacts

T-con voltages (typical)
1. Vin (Vcc): 12Vdc or 5Vdc
2. Vlogic,LCM, Vddd,VCC): 3.3Vdc
3. Vda (Vs, Vsource,VDD, Vdda,Avdd): 14Vdc~20Vdc
4. Vgh (Vgon,VGHR, Von, Vddg): 20Vdc~30Vdc
5. Vgl (Vgoff,VST,VGHF,VGHEVEN, Voff,Veeg): -5Vdc~-7Vdc
6. HVDD about 8v
7. DVDD,VDDC 3.3v, 1.2v
8. VCOM about 5~10vdc
Would also check gamma voltages. Need picture of t-con

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

Need picture of t-con

Attached

[dskall]

Re: Samsung - LE32A457C1D - screen artifacts

You could post vgma1-18 voltages in order

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

vgma1-18 voltages

Point me, please where they are...

[diif]

Re: Samsung - LE32A457C1D - screen artifacts

There's a tcon that looks the same on ebay for £3.25 delivered.
I'm pretty sure the gamma voltages will be off.
What's the markings on the component top right ?

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

Thank you for your quick reply. It's:
MAXIM
MAX9590
ETU905
NTP60CB
It is the chip IC15

[diif]

Re: Samsung - LE32A457C1D - screen artifacts

Thanks, as suspected that is the gamma IC. However if a tcon is £3.25 delivered, there's not much point replacing the IC.
I've marked the points that show where the gamma voltage test points are.

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

You were right, my friend. There are no volts at all. Is that mean if there are no volts on these points, the gamma IC is broken and resoldering this IC will fix T-con board (in this case)? Or it is not worth to do soldering jobs when this model of T-con cost a few pounds only?

[diif]

Re: Samsung - LE32A457C1D - screen artifacts

Or it is not worth to do soldering jobs when this model of T-con cost a few pounds only?

This The washed out image certainly looks the same as when the more common AS15 gamma ICs Fail. Those tcons can cost over £15 and commonly over £30 so replacing a 50p part that takes 5 minutes to replace is worth doing.

In your case it looks like the tcon at £3.25 delivered is cheaper than the IC that has to come from China.

I would have expected some volts on those pins, but I still think it's worth just replacing the tcon.

[antas]

Re: Samsung - LE32A457C1D - screen artifacts

Thank you, my friends, for the help and time, spent for me. T-con ordered. I'll let to know what happens after replacement.