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shumakerscott 06-12-2010 02:46 AM

Samsung Flat Panel Repair #2
 
2 Attachment(s)
I got another Samsung tv for repair. This is happening quite regular lately. This time I took pics. Again it was the caps that caused it to not come out of standby. The caps sit right next to a heat sink that is very hot. The are getting baked and popping their tops. I'm glad because I'm making some extra $$. Here are a couple pics. The replacement caps were a little larger in diameter so they don't sit flush but work just fine. dorf dude...

nap 06-12-2010 03:38 AM

of there is a problem with the heat, why not move them?

shumakerscott 06-12-2010 03:46 AM

Next time I will put a little piece of radiant heat shield on them. Even foil would probably be ok. dorf dude...

bofusmosby 07-07-2010 11:28 PM

Shu

The problem with the failure is not the heat. This is what I do for a living. Been a repair tech for over 33 years. When they (the manufacturers) build these sets, they are putting in capacitors that are not rated a high enough voltage. THIS is causing these to fail. They could make these sets last longer, but they don't want them to. More and more of a disposible society.

I guess you could use the extra money for your house building job. :yes: It always comes in handy!

shumakerscott 07-08-2010 12:23 AM

I put higher rated caps in, thats why they are a little bigger. dorf dude...

bofusmosby 07-08-2010 08:26 AM

Good job! That what I always do. You see, you took care of the cause without knowing it. Also, I might add, be sure and install high-temp 105 degree caps as well.

lynnster 09-29-2010 06:19 PM

hello i was wondering u seem to know about tv repair maybe you could tell me why my sound stop working on a 52'' RCA bigscreen pic is perfect but no sound, but a low popping noise. thanks

bofusmosby 09-29-2010 06:54 PM

The first thing you need to do is to turn the TV off, and unplug the AC power cord. Let it sit unplugged for maybe 15 minutes, then plug it back in and try it. Are you on cable, and using a cable box? If so, the cable box can cause this. If you have a VCR or a DVD player, try using one of these and see if you have any sound. There is no way that I can talk you through a repair on a problem like this, but just trying to make sure that your TV is the problem, and not something else.

Try unplugging it first, and see what happens.

shumakerscott 09-30-2010 12:16 AM

Check the power supply caps. If it is letting un-filtered voltage through then that could cause your problem. Look for bulging or cracked tops. dorf dude...

spaceman spif 09-30-2010 12:34 AM

Hmmmm...I've been thinking of getting a plasma tv soon, and was looking into the Samsung vs. the Panasonic. I've heard of repair issues like this with the Samsung. What have any of you seen/heard with regards to the Panasonic plasmas?

Kellie Dobbie 09-30-2010 07:09 AM

Quote:

Originally Posted by shumakerscott (Post 466754)
I put higher rated caps in, thats why they are a little bigger. dorf dude...

I just wanna know, when you say you put in higher rated caps, do you mean you used caps with higher voltage rating, higher capacitance or both. This is the same problem I encountered with my Samsung LCD monitor.

ttech 09-30-2010 07:45 AM

The capacitor problem has little do to with voltage or heat. It is a result of a stolen electrolyte formula that was not complete.

http://en.wikipedia.org/wiki/Capacitor_plague

The replacement caps must be Low ESR capacitors. Off the shelf Radio Shack capacitors will fail due to their ERS rating.

shumakerscott 09-30-2010 04:44 PM

Quote:

Originally Posted by Kellie Dobbie (Post 509177)
I just wanna know, when you say you put in higher rated caps, do you mean you used caps with higher voltage rating, higher capacitance or both. This is the same problem I encountered with my Samsung LCD monitor.

Higher Voltage. You should get as close to the same capacitance as possibe. dorf dude...

shumakerscott 09-30-2010 04:48 PM

Quote:

Originally Posted by ttech (Post 509184)
The capacitor problem has little do to with voltage or heat. It is a result of a stolen electrolyte formula that was not complete.

http://en.wikipedia.org/wiki/Capacitor_plague

The replacement caps must be Low ESR capacitors. Off the shelf Radio Shack capacitors will fail due to their ERS rating.

Great link , thanks for sharing. I hope I can make a little extra $$ fixing these problems. dorf dude...

shumakerscott 09-30-2010 04:49 PM

Quote:

Originally Posted by spaceman spif (Post 509150)
Hmmmm...I've been thinking of getting a plasma tv soon, and was looking into the Samsung vs. the Panasonic. I've heard of repair issues like this with the Samsung. What have any of you seen/heard with regards to the Panasonic plasmas?

My Samsung which is over 2 years old is working fine. dorf dude...


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