Replacing My Memphis Audio ST-1000D blown output transistors. HELP!!! - Page 2 - diyAudio
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Old 28th June 2012, 11:46 PM   #11
Eva is offline Eva  Spain
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Does the fuse pop when remote is activated, or even with open remote?

I recommend you to get or borrow a current limited 12V supply, something that can do 10-25A and then fold back to avoid damage. After repair, doing the first test directly in the car is not a good idea, doing it in a work bench is much better.
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Last edited by Eva; 28th June 2012 at 11:50 PM.
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Old 29th June 2012, 11:10 PM   #12
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You need to check all transistors for shorts in the amplifier.
Output transistors failing will often take out the power supply transistors too if the fuse doesn't blow quick enough or the protect is too slow.

Just to complicate things I have seen blown output transistors taking the class d IC with them.
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Old 18th July 2012, 04:46 PM   #13
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Is there anyone willing to take the time to actually fix this amp for me PLEASE! I made an agreement with the wife that I would only reinstall this amp back into my car if I could fix it myself! That means I have a VERY limited budget but I know that there is only a bad resistor or transistor that's causing the red protect light to come on! I just don't have the knowledge or time to learn properly to get this amp working again and re-installed by the end of car show season! Please send me offers through a message. thanks
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Old 27th September 2012, 02:58 AM   #14
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Ok, so what are the parts labeled KO304 and KO307, voltage regulators? I was wondering what the possibility of these being burnt when the power FETS when out?

Also, if the through holes for the transistors lost their solder eye-lits when I was desoldering the old ones, can I solder the legs to the nearest solder point in that same area? For example, the first leg of the power FET connects to the gate resistor so can I solder a joint from the first leg directly to its cooresponding resistor?
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