rusty999 Posted January 17, 2009 Share Posted January 17, 2009 If it's anything like the 4000, then don't use it on bottom end duty. I've had 2x 4000's go into thermal and fall over. Just wondering if thats the problem I am having with my s1200 Dynacord--going into thermal as the above post suggests? The problem started when I noticed the right meter on the front going right into the red and staying there Both channels were still working away but when I tried turning down the faulty Chanel I found the volume knob had no effect and the level still remained full on. I was told by a well meaning friend that I could use the amp like this until I got it repaired, but that I would have no control over the volume on the right chan What has happened now is that the right chan is gone dead Whats the verdict? Hope someone here knows what I am on about as I am a bit of a novice thanks guys regards Rusty Link to comment Share on other sites More sharing options...
ChazHS Posted January 18, 2009 Share Posted January 18, 2009 If it's anything like the 4000, then don't use it on bottom end duty. I've had 2x 4000's go into thermal and fall over. Just wondering if thats the problem I am having with my s1200 Dynacord--going into thermal as the above post suggests? The problem started when I noticed the right meter on the front going right into the red and staying there Both channels were still working away but when I tried turning down the faulty Chanel I found the volume knob had no effect and the level still remained full on. I was told by a well meaning friend that I could use the amp like this until I got it repaired, but that I would have no control over the volume on the right chan What has happened now is that the right chan is gone dead Whats the verdict? Hope someone here knows what I am on about as I am a bit of a novice thanks guys regards Rusty Could quite possibly have cooked something, probably the output transistors. Was she running hot when she went? Link to comment Share on other sites More sharing options...
rusty999 Posted January 25, 2009 Author Share Posted January 25, 2009 If it's anything like the 4000, then don't use it on bottom end duty. I've had 2x 4000's go into thermal and fall over. Just wondering if thats the problem I am having with my s1200 Dynacord--going into thermal as the above post suggests? The problem started when I noticed the right meter on the front going right into the red and staying there Both channels were still working away but when I tried turning down the faulty Chanel I found the volume knob had no effect and the level still remained full on. I was told by a well meaning friend that I could use the amp like this until I got it repaired, but that I would have no control over the volume on the right chan What has happened now is that the right chan is gone dead Whats the verdict? Hope someone here knows what I am on about as I am a bit of a novice thanks guys regards Rusty Hi all Anyone got any thoughts on the above problem or suggestions as to what might be the fault?Thanx Rusty Link to comment Share on other sites More sharing options...
Stan Hope-Streeter Posted January 25, 2009 Share Posted January 25, 2009 <br /><br />Anyone got any thoughts on the above problem or suggestions as to what might be the fault?<br />Thanx <br />Rusty<br /><br /><br /><br /> An uncontrollable full-on level pot is normally due to its earthy end becoming disconnected. Quite common in modern equipment where the pots are soldered directly to the circuit board. If you're lucky, the silent channel is due to another pin of the pot breaking contact. If not, you may have thrashed the amplifier and let some of the magic smoke out. Link to comment Share on other sites More sharing options...
KevinE Posted January 25, 2009 Share Posted January 25, 2009 The S1200 are the same internally as the Electrovoice Q66 arent they? They are a class-H bipolar topology with mosfet rail switches. They are paricularly difficult to repair to the uninitiated...an output failure almost always blitzes several layers of components, minature fusible resistors and driver components. Are you sure you want to dive in? Link to comment Share on other sites More sharing options...
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