Author Topic: TV repair??? Help (Read 2464 times)

domain · « **on:** November 23, 2015, 10:45:39 PM »

https://youtu.be/2ec1gmjxpCM

Samsung PN50A550S1F

All caps appear ok

c102 replaced with 47uf lytic no change see video its crazy

Im good with dmm but do not know tvs

Vs and Va are dead on but drop then rise again when it resets.

standby stays constant

redrock · « **Reply #1 on:** November 25, 2015, 03:16:06 PM »

Hi, go to shopjimmy.com and punch in your model #. They sell the Y-main board and the power supply boards. They also sell rebuild kits for both boards. No capacitors in either kit. Give your complaint and maybe they are your answer. I bought a kit for a different set from them with excellent results. Paul

TPerkins · « **Reply #2 on:** November 25, 2015, 03:46:36 PM »

Is that cracking noise coming from the TV?

I actually work at Shopjimmy and have done TV repair for about 20 years now.

If you go to GSPN, there is a bulletin on how to run your set without the main board. It will bring up test patterns, but it will eliminate the main board as the cause of your issue....which I have a feeling it is.

domain · « **Reply #3 on:** November 25, 2015, 03:51:46 PM »

yes all noise from tv beside my wife speaking lol. ive narrowed it down to the main pcb... any thoughts

TPerkins · « **Reply #4 on:** November 25, 2015, 03:58:02 PM »

Do you have access to GSPN domain?

Looks like we are currently out of stock on all 4 main boards used in that model though....

domain · « **Reply #5 on:** November 25, 2015, 05:57:07 PM »

I dont man... these boards are rare. Idk what to do! Thank u for helping

TPerkins · « **Reply #6 on:** November 28, 2015, 09:24:01 AM »

I'll see if I can link the service bulletin about isolating the main board sometime today for you. Give me an hour or so here.

TPerkins · « **Reply #7 on:** November 28, 2015, 09:44:17 AM »

TPerkins · « **Reply #8 on:** November 28, 2015, 10:16:11 AM »

Not able to link it because the wmv file is too big.

Basically what you want to do is find the connector the goes from the power supply board to the main board. Use a jumper wire to short the PS_ON pin to GND. Don't use chassis ground, just use one of the pins on that connector. Not sure which power supply you have in your set as Samsung used 2 different ones.

Then take an alligator clip and short the 2 highest numbered pins on the logic board. Some logics had a 4 pin and some had a 6 pin connector. On the 4 pin, short pins 3 and 4. On the 6 pin, short pins 5 and 6 using the alligator clip. These pins will look like connector CN2013 located on the lower right of the board in the attached picture.

http://www.shopjimmy.com/samsung-lj92-01531b-main-logic-ctrl-board.htm

Then power up the set. You should see test patterns on the screen. If the test patterns look good and the set doesn't cut out and make that popping noise like in your video, then its 100% confirmed the issue is on that main board.

Hope that helps! Lemme know if you have any other questions.

domain · « **Reply #9 on:** November 28, 2015, 01:54:52 PM »

im sorry that i didnt tell you. I HAVE DONE ALL THE STEPS and agree is the main. I ordered 2 tatylum caps, buck ic but not the audio one in the shop jimmy kit. DONT FEEL like this will help but ill try

TPerkins · « **Reply #10 on:** November 30, 2015, 08:26:09 AM »

I can check and see if we have any defective boards in stock and possibly pull the audio IC for you if you wanted to give that a shot.

Would need the part number of your main though if you wanted to try that. Let me know.

domain · « **Reply #11 on:** November 30, 2015, 09:21:07 AM »

Yeah i replaced those three and no change. I just need a main. Any ideas?

TPerkins · « **Reply #12 on:** November 30, 2015, 09:23:00 AM »

Whats your board number?

http://www.shopjimmy.com/catalogsearch/result/index/?cat=56&q=PN50A550S1F

domain · « **Reply #13 on:** November 30, 2015, 11:38:31 AM »

Bn94-01658e. I hope you can help lol

TPerkins · « **Reply #14 on:** November 30, 2015, 12:35:07 PM »

Kinda spendy, but found one in stock here...

http://www.tvserviceparts.com/BN94-01658A.html

domain · « **Reply #15 on:** November 30, 2015, 01:59:03 PM »

Darn! maybe you could put a kit on a defective main you have and I buy??

TPerkins · « **Reply #16 on:** November 30, 2015, 02:26:03 PM »

Lemme see what I can do for ya. Gimme a couple hours here and I will find out. Im swimming in defective air compressors at the moment

domain · « **Reply #17 on:** November 30, 2015, 02:43:00 PM »

I can pay upfront ill pm my number to TEXT

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