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Overheated Midiland Amplifier/Subwoofer
Overheated Midiland Amplifier/Subwoofer
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Old 14th March 2005, 06:54 AM   #1
mobiustripper is offline mobiustripper  United States
diyAudio Member
Join Date: Mar 2005
Unhappy Overheated Midiland Amplifier/Subwoofer

I have a Midiland s8200 5.1 surround sound system that plays double duty for my computer and the dvd player. Problem is I think I overheated the thing when I left it on (by accident) while I was away for 2 days!!!

The amplifier sits in the subwoofer housing. I turn it on and immediately get a loud hum. (No, it is not a ground looping problem) When I turn it off it gives a loud pop on the satellite speakers and sub. There is an LED labeled "power/prot." which is normally green. Now when I turn the power off it fades slowly, then it turns to orange before fading out completely.

If I don't wait a while, and I turn the power on again, the speakers and sub will give a very loud initial pop.

I have opened the housing and done the only thing I knew to do. I looked for physical signs of burnouts and checked the 4 fuses inside. No obvious burnouts and the fuses were fine.

I freely admit that I am the definition of the word newbie when it comes to this. That said, I'm a fairly intelligent guy. I understand BASIC electronics, I know how to solder, I fix things, etc. My assessment so far is that something burned out, the current is not being passed correctly, and the excess is being stored in the capacitors. I'm probably way off, but I don't know where to start.

These were a great set of speakers. I really enjoyed them. I hate the thought of having to abandon them for such a silly mistake. If anyone can help a guy out, it would be greatly appreciated.
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Old 14th March 2005, 07:17 AM   #2
simon5 is offline simon5  Canada
diyAudio Member
Join Date: Nov 2004
Location: Québec, Québec
Besides the loud pop, are they working correctly?
DIYaudio for President !
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Old 14th March 2005, 08:14 PM   #3
thomas997 is offline thomas997  Canada
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Join Date: Feb 2004
Location: Vancouver
I have the same system.. It is nicely built, and decent bass from the small sub (needs a little bump on the control box though).

If you find any suspect parts I can check my values to compare.

btw mine makes a small pop after turning off, but I have never seen the LED glow orange (possible overvoltage? Or is it actually a dual green/or led).
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