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Old 8th January 2009, 10:57 AM   #1
joka22 is offline joka22  United Kingdom
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Join Date: Jun 2007
Default one channel chip dead????

one channel in my chip amp has decided to pass away. At first i connected the input wire to the lead from one channel chip amp sound came out then faded away and came back and then just died.

I have measured via plus and minus of the power cable to it and it is receiving power. I have checked input leads they are connected and are conducting (performed multimeter continuity test). chnaged input leads other way around. and even chnaged speakers and tested each speaker wire.

Can someone explain to me why my chip 3875 had to die ??? it is cold not warm on the heatsinks.

I think the chip 3875 has burnt itself out.


the other channel chip amp is warm when i play music, so i know that is working.

i have had the amplifier for almost 6 months working and then the bastrd died.
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Old 8th January 2009, 07:09 PM   #2
Puffin is offline Puffin  United Kingdom
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Is it a kit amp and if so which one?

Were you listening to it when it died or did it happen on switch-on?

You will need to check the voltage at the chip pins. However as it is cold it suggests it is indeed a parrot.
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Old 8th January 2009, 08:11 PM   #3
joka22 is offline joka22  United Kingdom
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I turned the amp on and sound came and faded i then twisted the coper bit of the wire (input wire -jack plus from pc to amp) a few more turns and sound came and then it just totally died.
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Old 8th January 2009, 08:32 PM   #4
mjf is offline mjf  Austria
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if he does not warm up he is receiving no power.
if there is voltage at the leads outsideerhaps a broken connection lead-innerside-caused by mechanical stress or strain.
first soldering the amp at the board and then fixed to the heatsink?
perhaps this can help you.
greetings.............
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Old 8th January 2009, 09:27 PM   #5
Puffin is offline Puffin  United Kingdom
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More info needed
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Old 8th January 2009, 09:52 PM   #6
joka22 is offline joka22  United Kingdom
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Join Date: Jun 2007
will perform that i am sure the damn stupid chip has died does ahve some kind of smell but i cannot make it out if it burn smell or just wiring smell.

will perform the follwoing steps you have suggested in the morning.

But i greatly thank you all people for repying and helping me.
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