samsung ln46a540p2fxza red light blinking

[Barn01]

Re: samsung ln46a540p2fxza red light blinking

I've got the blinking red LED as well. I've replaced the usual caps on the P/S and that didn't change anything. They didn't look bad but I thought it was a go to. Then I found this thread and started playing with the main board.

I've replaced C102 on the back and C131 on the front with 47uF Tantalum caps but not surface mount. See pics!

Anyhow that didn't fix it.

I also re-soldered the legs of IC101 and that didn't fix it either.

Any thoughts?

[jet]

Re: samsung ln46a540p2fxza red light blinking

Got it going (no power cycling) now I have to fix the bad picture. I think I saw another thread here somewhere on that. Looking now.

[vinceroger69]

Re: samsung ln46a540p2fxza red light blinking

Thanks budm thats a better picture than i managed to find and thanks for the resistor smd chart ive saved it too.

[jet]

Re: samsung ln46a540p2fxza red light blinking

budm,

Thanks for that chart I did not have that, have saved it to my bookmarks. I will get on it in the morning, will also check R104 to make sure it's OK.

Now back to watching The Tragically Hip's last show OTA on my 50" Samsung Plasma I repaired with help from this forum

Thanks again will let you all know how it worked out

[budm]

Re: samsung ln46a540p2fxza red light blinking

R107 is 18C = 15K Ohms (http://www.talkingelectronics.com/pr...-Markings.html)

R104:39K (R1 formula), R107:15K (R2 formula) are the Vout Voltage setting resistor network, in this case, it is set to 3.3V Output for the IC101 MP2363.

[jet]

Re: samsung ln46a540p2fxza red light blinking

so if it is 180 that make is 18 ohms then i think?

[vinceroger69]

Re: samsung ln46a540p2fxza red light blinking

ive looked at a few pictures online r107 it looks like 180 is printed on it? maybe budm has a idea or a picture showing the resistor as im sure he has done this repair before

[jet]

Re: samsung ln46a540p2fxza red light blinking

Hi,

I attempted this fix, got the cap replaced but in the process I lost R107, my eyes are not what they used to be and soldering with a magnifying glass is tough LOL. Can someone tell me the value of R107 so I can replace it?

TIA, jet

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

I appreciate the help

[budm]

Re: samsung ln46a540p2fxza red light blinking

Thanks for the repair follow-up.

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

You are good. I replaced that capacitor. C102 and the tv is working now


Thank you very much

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

ok just ordered one

lets see if it fixes the issue

thanks

[budm]

Re: samsung ln46a540p2fxza red light blinking

http://www.digikey.com/product-detai...0CT-ND/4146673

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

What is the difference between a black and beige capacitor? Looking on ebay currently. Unless you have a better suggestion. Thanks

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

Ok I guess I need to order one of those capacitors

Thanks

[budm]

Re: samsung ln46a540p2fxza red light blinking

The 'C102' silkscreen printing is partially under the IC IC101. it is on the right of R107.
https://www.badcaps.net/forum/attach...8&d=1450311523

Notes: Silver bar on this TANTALUM cap indicates POSITIVE leg of the cap.

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

I do not see a c102

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

Yes I was using chassis ground

[budm]

Re: samsung ln46a540p2fxza red light blinking

http://www.shopjimmy.com/samsung-bn9...repair-kit.htm

Replacing just C102 (Tantalum 47uF 10VDC) will usually solve the problem.
From SJ PAGE:
The Samsung BN94-02077D Main Board Component Repair Kit includes all necessary components to repair common failures on the Main Board. Symptoms include no audio on any input, repeatedly turns on and off, red power LED blinks forever.

Samsung BN94-02077D (BN41-00975B, BN97-02472D) Main Board

[cjrolke]

Re: samsung ln46a540p2fxza red light blinking

I see another part number. Bn41-00975b (2008.01.10)