Question about RCA RT2500 System

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RCA RT2500 Buzzing Sound - Replace 6800uv 16v caps

Hi,

I need help. Can someone walk me through the steps of replacing the 6800uf 16v capacitors on my rca rt2500. Apparantly I need to replace these to fix my buzzing sound problem.

Thanks,

Mobay

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I did it. I decided to go ahead with the repair myself. I have never done something like this before but it was easier than I thought. I filed off the old parts and soldered on the new. It works like a charm. Thanks.

Posted on Mar 17, 2008

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Posted on Jan 02, 2017

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Tv whines and turns on and off. good picture everything works just makes the buzzing sound and turns off and on by itself. I think replace power supply. any input would be great thanks.


It is more than likely a capacitor or two on the power supply. I would replace the power supply or the capacitors on the PSU board if you are comfortable with a soldering iron, flux and desoldering braid/ vacuum pump.
When I replace the caps I always get a slightly higher voltage and ensure I get 105° rated caps. If possible find some low ripple capacitors. Typically if they are 16V 1000uf I will replace with 25V 1000uf 105°.

Dec 14, 2015 | Televison & Video

1 Answer

6800uf/16v Capacitor?


You can use a higher voltage capacitors without problems its the value of uf that should remain the same. But sometimes you can use a higher uf like a 330uf can be replaced with 470uf but never go lower than the original value on uf and voltage. But you can safely use 6800uf 25v or 35v.

Jul 07, 2008 | RCA RT2500 System

1 Answer

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Similar problem here, at first 20-30 min warm-up time, followed by irregularity in sound levels, to a complete failure after using for around 30 minutes after warm up (choppy sound to a steady buzz). I wonder if over heating has something to do with it since I left it on all the time after the need of a warm-up occurred. One night, a horrid buzz came from the system and ever since it would become unbearable to listen too after a few minutes, I am debating either to attempt a fix or chunk it. I haven't tried the caps and fuses yet, but seeing your problem leads me to believe it is something more to the problem, and more likely a better investment would be an upgrade.

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Hey EmperorBob, was reading a short across D119 & D120. pulled (I think it was) C139 and was able to get a good reading across the two diodes. reading a short on the cap (out of circuit). Still poking around. Will let you know if I find anthing else...

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1 Answer

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I'd suspect your power supply capacitors are on their last leg. replace them.  - This was posted by videoguy1742. :   this problem is CURED simply by replacing 2 capacitors inside on the main board. They are easily identified by a bulge on the top end of the capacitors. The capacitors are located between the heat sinks. The size is 6800uf/16v.
I am a RadioShack dealer and sold a few of these in 2000/2001. I bought one for myself. I have repaired only 2 that had the same problem as listed by HAGUC above. They both are working great and for the record. . .are NOT peices of JUNK,. . .hehe. . .they just need a little TLC. Parts available from larger electronics parts houses, not at RadioShack

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It sounds like a capacitor in the power supply is just about to die. With the power disconnected have a look at the large tin can looking gizmos near the power transformer. There could be a couple of them. Leave the unit switched off for a while before going near them they could still pack a splat. Replace them with the same value and make sure they're connected the right way and it should solve your problem. Whilst in there have a good look for any other smaller capacitors which look as if they're getting rounded at the top. Replace them too. Either that or dig deep and buy a new one.

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i have the same system that i bought new and after about 3 yaers it did the same thing for no reason. i think you get what you paid for!!!

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