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Old 17th January 2006, 09:27 PM   #1
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Unhappy Dead Amp?

Ok so for the past few months I have been having a little issue with my Kicker KX600.1 amp. A few months ago I noticed that the amp would click off after a a few minutes of use, then it would turn back on and be fine a few weeks, then it would do it again. So I figured that maybe the setting were set to high, so I adjusted them, but still the samething. My next thought was maybe it is over heating because it is summer, so I put a fan on it , and still nothing. Well flash forward to yesterday morning. I get in my car start driving, amp is fine, then out of the clear blue my sub stops working. I figured it would come back on in a few seconds, but to my surprise it didnt turn back on at all.

I get home to see if maybe there is a loose wire somewhere, but nothing still dead . Next I unplug the sub and remote wire to see if maybe the wires were bad, nothing, but I did notice something odd. On the side of the amp there is 2 LEDS one green and one red that light up when the amp is hooked up, on, and powered properly. I noticed that if I unhook the sub and hook the remote wire up, the Red LED lights up faintly then goes out. I have no clue what could have happened. Today Im going to take it all apart to check all my wires and test the amp, but before I do that I was wondering if anyone could chime in and help me out with what could possibly be wrong? Oh this amp was made in 2002 and has a12" Eclipse 8122DVC Aluminum hooked up to it and has 0 gauge wire. I already checked all the fuses on the amp and the main lead fuse and they are fine.
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Old 18th January 2006, 03:34 PM   #2
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I've seen a few of those with shorted inductors on the output filter. On the toroidal inductor look VERY closely at the point where the final winding crosses over the top of the coil just before it goes to the board. If there is a very fine powdery material where the coil windings touch, the insulation has been worn away and is probably intermittantly shorting to the other winding.

If you can twist the inductor a ltttle and the amp comes back on, the problem is most likely the shorted windings.
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Old 18th January 2006, 04:16 PM   #3
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Here is a picture of what the Amp looks like. Could you point out where you are talking about?

http://i8.photobucket.com/albums/a20...n/ab295167.jpg
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Old 18th January 2006, 04:34 PM   #4
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Also check the windings to see if they're broken. Push the coil to either side and look at the point where the coil enters the board.
Attached Images
File Type: jpg kicker600b.jpg (87.0 KB, 225 views)
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Old 18th January 2006, 04:52 PM   #5
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Ok there is no sign of powder at all and the winding is all intack. I pushed every which way on all parts of it and still no power.
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Old 18th January 2006, 05:09 PM   #6
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That's the only intermittant problem I've seen in those amplifiers.

Did you confirm that you had good B+, remote and ground at the amplfier (with a voltmeter)?
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Old 18th January 2006, 05:27 PM   #7
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Yeah 13.5 volts to and from each one. I have a feeling it is the IRF3205 and YG225D2 Transistor and diodes in the power supply
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Old 18th January 2006, 06:01 PM   #8
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Remove 'all power' from the amp and measure the resistance from pin 1 of a 3205 to pin 2 of the same transistor. If it has a resistance near zero ohms, the 3205s are likely defective. If the resistance is high, they are likely fine.
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Old 18th January 2006, 06:28 PM   #9
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Ok from here is what I got

Gate- Source 46.8k (with the Positive lead on gate and negative on source)

Drain-Source 113.5k + (positive lead on drain , negative lead on source)

Drain-Gate 334K (Positive lead on Drain, Negative Lead on Gate)


Im not sure wht is high or what is low
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Old 18th January 2006, 08:34 PM   #10
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Here is something I just found, but Im kind of unsure what to think.


http://i8.photobucket.com/albums/a20...omofboard2.jpg

http://i8.photobucket.com/albums/a20...rontboard2.jpg
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