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Re: [Shop-talk] Shop-talk Digest, Vol 13, Issue 24

Subject: Re: [Shop-talk] Shop-talk Digest, Vol 13, Issue 24
From: Mark Miller via Shop-talk <>
Date: Mon, 25 Feb 2019 22:27:33 -0800
References: <>
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Late to the game but:

the cap that blew was on the input (connected to pin 1, leftmost in your 
image), so I would guess there was a voltage surge that came in and took 
out the cap and possibly the regulator (but my guess is the regulator is 
probably fine - they are pretty tough).

Change them both and give it a try, worth the few $$s it will cost.  
Parts are quick and easy to get from either Digikey or Mouser.

(be careful to gt the polarity right with the cap or they go off like a 


Mark Miller   707-490-5834

On 2/23/2019 7:12 AM, wrote:
> Today's Topics:
>     1. Help identifying a chip (Battmain)
> ----------------------------------------------------------------------
> Message: 1
> Date: Sat, 23 Feb 2019 05:07:29 +0000 (UTC)
> From: Battmain <>
> To:
> Subject: [Shop-talk] Help identifying a chip
> Message-ID: <>
> Content-Type: text/plain; charset="utf-8"
> Finally got around to installing an amplified speaker I had sitting around 
> for years.? It was supposed to be a simple install, but looks like I fried 
> something in the haste.?
> I already picked up the capacitor in the picture,? but I think the regulator 
> might be fried also based on the burn marks.Seems there are different models 
> of that regulator.? The amp is in a 12v application.? Anybody have any ideas 
> as to what model regulator it is? (or what I could substitute it with? Will 
> be getting it from that auction site. :) )?Picture in the link...(that's the 
> best I could get)?
> I figure if I throw $5 at it in parts, it wouldn't hurt to try.?
> Brian

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