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Old 05-11-2013, 10:49 PM
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Default simple amp repair?

So I got a Planet Audio BB2400 from a friend for free, he just didn't want to mess with fixing it. The problem is, it needs the rca's replaced. I've got the new part here, but where I'm stuck is how to remove the board from the case. As far as I can tell, that's the only way to replace the part, since there's 6 spots that have to be soldered in about a 1 square inch area.

Has anyone ever repaired the rca's on an amp? I was told that it would be a pretty easy fix so I figured I'd have a go at it myself. I'm just stuck on how to get the board out without damage, since I'm not seeing any mounting screws or anything.
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Old 05-11-2013, 11:06 PM
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Ud have to unscrew all the gets, keeping track of the isolators behind them (little plastic sheets) then any other screws and end caps that need to be taken out that hold the board down...then u can pull the board...de-solder and re-solder the new rca... get some new dielectric grease (the white crap behind the gets that gets everywhere) they sell it at radio shack, apply a lil new grease... and do everything u did to remove it, but backwards...the sheets behind the gets is very important that there not lost or placed to allow the fet to touch

Encase ur unsure, this is a fet
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Old 05-11-2013, 11:15 PM
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That board may be a slide out design once the fets are free
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Old 05-11-2013, 11:17 PM
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Thanks jeff! The only thing I'm not getting is the fets part. I'm not seeing any screws or anything holding them down, just a metal piece over them that kinda pinches them in place. I can get a pic but it'll take a minute.
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Old 05-11-2013, 11:20 PM
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Originally Posted by jheist1991 View Post
Thanks jeff! The only thing I'm not getting is the fets part. I'm not seeing any screws or anything holding them down, just a metal piece over them that kinda pinches them in place. I can get a pic but it'll take a minute.
There clips

How to easily remove Mosfet Spring clips Tutorial - YouTube
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Old 05-11-2013, 11:27 PM
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Ok I feel like at this point, I should be getting mildly nervous. I've gotten a portion of the clips off, revealing 10 fets, and not one thing holding them in, no screw, bolt anything.
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Old 05-11-2013, 11:31 PM
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Ok I feel like at this point, I should be getting mildly nervous. I've gotten a portion of the clips off, revealing 10 fets, and not one thing holding them in, no screw, bolt anything.
Might be a slight bit of glue behind them...what ever u do, Do NOT pinch the fets with pliers and such.. there brittle

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Old 05-11-2013, 11:35 PM
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The fets will adhere to the thermal pad, you will have pry them away from the heatsink.

There us also a couple screws holding the board in, don't forget the gnd wire also.
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Old 05-11-2013, 11:36 PM
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Yep, nothing there. No screws, no glue, nothing. Just the white grease and slip behind them. Oh and now I understand why these amps are so cheap lol. Using the codder pin tool like in the vid, I'v already had 2 of the clips start to crack around the hole with almost no pressure.

In all honesty, this is starting to seem like more work than it's worth, but now I'm too far in to stop lol
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Old 05-11-2013, 11:38 PM
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The fets are held by the clips and dielectric compound. Pry them up and slide the board out... on those amps the board actually isn't anchored to the heat sink. I just took two apart last week lol

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