Samsung capacitor replacement

[rdarioh90]

Have a samsung 52" with 4 25v 1000uf 85c capacitors in the power supply board. 2 were blown. replaced those 2 with nichicon 35v 1000uf 105c capacitors. I understand you can go up in voltage and heat resistance as long as the uf is the same, but i have replaced those capacitors twice now with the same results, they blew within 3 days. Should I replace all 4? I saw 50v 1000uf 105c capacitors online, should I go with those instead?

 

[ram1009]

It's very likely that something in the TV circuit is over taxing the power supply. If the caps were under speced from Samsung you should be able to find others with the same problem using google.

 

[rdarioh90]

Hey Ram, thanks for your reply. Yeah, they were underspeced, thats why I went up from 25v to 35v, still with the same results. Thats why Im considering the 50v. Do you think that would be too much? Its double the original capacitor. Will continue to see if there are other results in google as well.

 

[ram1009]

Hey Ram, thanks for your reply. Yeah, they were underspeced, thats why I went up from 25v to 35v, still with the same results. Thats why Im considering the 50v. Do you think that would be too much? Its double the original capacitor. Will continue to see if there are other results in google as well.

If I thought the TV was worth saving I would let a qualified repair person render an opinion, assuming such a person exists. Why do you think they were under speced? Have you found others with the same problem? Surely your TV wouldn't be the only one.

 

[rdarioh90]

I had the same problem with a 32" samsung a while back, these also had 25v capacitors, did some research and found that samsung had underrated their capacitors for several of their brand tvs, or went with an inferior quality capacitor. After asking a tv repairman, he wanted to repair it for nearly half the price it originally cost! So I decided to buy 35v capacitors ($6.95), replaced them and the tv has worked without a problem ever since. Thats why I decided on the repair myself for the 52".

 

[ram1009]

I had the same problem with a 32" samsung a while back, these also had 25v capacitors, did some research and found that samsung had underrated their capacitors for several of their brand tvs, or went with an inferior quality capacitor. After asking a tv repairman, he wanted to repair it for nearly half the price it originally cost! So I decided to buy 35v capacitors ($6.95), replaced them and the tv has worked without a problem ever since. Thats why I decided on the repair myself for the 52".

Well, I guess if I'd had the same experience as you I'd be doing the same thing. Please post the outcome. I'm curious.

 

[rdarioh90]

Will do, this time I think I will replace all 4 capacitors with 35v, rather than just the 2 that went bad. Its possible the other 25v capacitors are not up to par and the new ones are taking the brunt of the load. Will order and update in about 1 1/2 weeks.

 

[ram1009]

Will do, this time I think I will replace all 4 capacitors with 35v, rather than just the 2 that went bad. Its possible the other 25v capacitors are not up to par and the new ones are taking the brunt of the load. Will order and update in about 1 1/2 weeks.

You're theory could be correct. It depends on the circuit. I don't suppose you have a schematic do you?

 

[makkem]

Hi
If the 35v capacitors blew within three days then you need to get a multimeter and measure the voltage and whether it is AC or DC on the capacitors,as this could be a blown rectifier diode that is putting a high AC voltage on the Caps instead of DC.

 

[ram1009]

Hi
If the 35v capacitors blew within three days then you need to get a multimeter and measure the voltage and whether it is AC or DC on the capacitors,as this could be a blown rectifier diode that is putting a high AC voltage on the Caps instead of DC.

Yeah, I agree. I thought about making similar suggestions but the OP's experience level is unknown and power supplies are not to be poked at especially without a schematic.

 

[americanaudiophile]

You should also get caps rated for 105 degrees temp instead of the common 85 degree. This is where the makers under spec all the time.

 

[rdarioh90]

I went ahead and ordered 4 Panasonic 1000uf 35v 105degree capacitors rather than the nichicon capacitors i had last time. Rec'vd them last friday and replaced all 4 capacitors on the power supply board. Its now been a full week and the unit is working like a dream! I thank all you guys for your suggestions, they were all sound and very well thought out, but I was 80% to 90% it was the capacitors. Thanks Again

 

[ram1009]

I went ahead and ordered 4 Panasonic 1000uf 35v 105degree capacitors rather than the nichicon capacitors i had last time. Rec'vd them last friday and replaced all 4 capacitors on the power supply board. Its now been a full week and the unit is working like a dream! I thank all you guys for your suggestions, they were all sound and very well thought out, but I was 80% to 90% it was the capacitors. Thanks Again

Thanks for the feedback. Troubleshooting something like this is always something of a crapshoot. At least you had blown caps as a clue. It's hard to believe a company the size of Samsung would make such a mistake. They probably had some intern design the circuit. Please re-post (or PM me) if this recurs. BTW, you never said how long the set was in service before the first failure.

 

[rdarioh90]

No prob! And thanks as well, the 52" set was in service for 2yrs before it crapped out, again the same thing occured with the 32" I had. The research I followed also stated that these samsung units had a life span of about 2 yrs thanks to these capacitors. Im thinking they did this on purpose to force people to purchase new units after a certain amount of years go buy, they just didnt think they would blow so soon and they got called out on it!

 

[ram1009]

No prob! And thanks as well, the 52" set was in service for 2yrs before it crapped out, again the same thing occured with the 32" I had. The research I followed also stated that these samsung units had a life span of about 2 yrs thanks to these capacitors. Im thinking they did this on purpose to force people to purchase new units after a certain amount of years go buy, they just didnt think they would blow so soon and they got called out on it!

Every company I've ever worked for ties to define/control the life of their product, however 2 years on a high dollar item isn't going to engender much brand loyalty. Let's hope the repair holds up. It's always great to hear of someone beating the system.