Samsung model LN52A750R1FXZA Power cycling

[bbsimons]

Has anyone seen and fixed this problem on a Samsung LN52A750R1FXZA? I have come across two different issues with these TV's on these boards. One was the capacitor issue with the bulging capacitors. I have replaced the capacitors with no luck and the problem persist. The TV will go into a constant loop of powering off and powering on. Only way to stop it, is to unplug the power.

I also came across this thread,
https://www.badcaps.net/forum/showthread.php?t=32061, which discusses the same issue on many Samsung TV's about the same age. All were fixed by changing out the c102 Tantalum Capacitor. Thought that I found my fix for sure; however, my main board is slightly different and doesn't have that capacitor.

I have posted two different pics (front and back of my board). Anyone have any ideas with this specific model?

Thanks,

Bobby

[budm]

Re: Samsung model LN52A750R1FXZA Power cycling

Try heating those NEC-TOKIN caps (those are the same type of failed cap as used for C102).
Pictures provided bu shopjimmy.

[bbsimons]

Re: Samsung model LN52A750R1FXZA Power cycling

I heated the chips as recommended. This worked for about 4 days. The TV started cycling again over the weekend. I think I will start replacing these and see if I can make the fix more permanent.

[eblaize]

Re: Samsung model LN52A750R1FXZA Power cycling

I'm beginning to have issues with this same model not powering up and when it does I sometimes get a screeching sound accompanied with a distorted green image. Going to begin to look into it this weekend.

[braxton]

Re: Samsung model LN52A750R1FXZA Power cycling

yes please continue to update this thread and let us know if any bad caps are found on the main board...

I have a ln46a650 that also does not have C102, but occasionally power cycles (accompanied by a glitchy image during the power cycles)

[budm]

Re: Samsung model LN52A750R1FXZA Power cycling

For ref:
https://www.badcaps.net/forum/showth...228#post631228

[braxton]

Re: Samsung model LN52A750R1FXZA Power cycling

For ref:
https://www.badcaps.net/forum/showth...228#post631228

Thanks!!! I will order some caps for replacement...

[Dapper Dan]

Re: Samsung model LN52A750R1FXZA Power cycling

SAMSUNG BN94-01658E C102 location number is under IC101 if you are looking for that first, good luck.

The kit from ShopJimmy is a ceramic replacement cap with no polarity which can be installed in either direction.

Shopjimmy offers no support at all!

IC1203 - STA335BWS (SSOP-36) I could only find this on Ebay!
IC101 - (MP2363DN) Digi-key P/N 1589-1366-ND
C102 - 47uF 10V Tantalum Capacitor Digi-key P/N P16230CT-ND

I used an iron to mount C102 after I mounted IC101 due to size, worked nice for me!

Hope this will help someone!