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afterdawn.com > forums > home theater > receivers and amplifiers > amp problem...easy fix?
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amp problem...easy fix?
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coolguy86
Newbie
_ 		5. May 2010 @ 13:35 _ Link to this message    Send private message to this user   
a friend gave me an amp a while back and said the transistor was burnt up in it....can this be repaired? Its a car amp. If so, where can i buy a replacement one? How do i go about repairing it?
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aldan
Senior Member
_ 		5. May 2010 @ 13:49 _ Link to this message    Send private message to this user   
well,after you find out which transistor is burnt you go to an electronics store with the old transistor and buy a new one and some heat sink grease.install same and voila,bobs your uncle.
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dailun
AfterDawn Addict
_ 		5. May 2010 @ 14:20 _ Link to this message    Send private message to this user   
And just remember that "burnt up" doesn't necessarily mean physically "burnt up".

If you're lucky you'll be able to identify it by sight alone, otherwise, you may need to take a meter and ohm out each transistor.
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david66
Senior Member
_ 		5. May 2010 @ 17:37 _ Link to this message    Send private message to this user   
Originally posted by coolguy86:
 a friend gave me an amp a while back and said the transistor was burnt up in it....can this be repaired? Its a car amp. If so, where can i buy a replacement one? How do i go about repairing it?
It is not an easy fix unless you know what you are doing you have 2 choices 1 take it to a repair center and get it repaired the cost can be high 2 go out and buy a new unit
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coolguy86
Newbie
_ 		6. May 2010 @ 00:45 _ Link to this message    Send private message to this user   
Well, the amp would make a thump sound every so often...i dont know that it was the transistor, but thats what he said it was....what does the transistor look like?
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Paula_X
Suspended permanently
_ 		6. May 2010 @ 03:50 _ Link to this message    Send private message to this user   
If you don't know and don't have the intelligence to google some of the part numbers you find printed on things inside then forget it.

There will probably be a lot more than just a "burnt transistor" anyway.. now... a very high chance that after sourcing one possibly very expensive component it will just go pop again as soon as it's powered up.

love the supposed description "it goes thump once in a while" .. hahaha.. means nothing.. an amplifier either works or it doesn't IF a major active component has failed that is. what else does it do?.. does it seem to work other than that.. still guesswork is not the way to attempt to repair electronics.

take it to somebody who knows what they are looking at.. and be prepared to pay more to get it repaired than it would cost to replace. (it's a car amp.. so it's worthless crap.. it ain't a valuable 1960's tube amp.. those are worth repairing)
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xboxdvl2
Senior Member
_ 		10. May 2010 @ 03:41 _ Link to this message    Send private message to this user   
unless you have the time,patience and equiptment to test all the components and check everything, probably easier to replace it.
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custom built gaming pc from early 2010,ps2 with 15 games all original,ps3 500gbs with 5 games all original,yamaha amp and 5.1channel surround sound speakers,46inch sony lcd smart tv.
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aldan
Senior Member
_ 		10. May 2010 @ 12:33 _ Link to this message    Send private message to this user   
Originally posted by Paula_X:
 If you don't know and don't have the intelligence to google some of the part numbers you find printed on things inside then forget it.

There will probably be a lot more than just a "burnt transistor" anyway.. now... a very high chance that after sourcing one possibly very expensive component it will just go pop again as soon as it's powered up.

love the supposed description "it goes thump once in a while" .. hahaha.. means nothing.. an amplifier either works or it doesn't IF a major active component has failed that is. what else does it do?.. does it seem to work other than that.. still guesswork is not the way to attempt to repair electronics.

take it to somebody who knows what they are looking at.. and be prepared to pay more to get it repaired than it would cost to replace. (it's a car amp.. so it's worthless crap.. it ain't a valuable 1960's tube amp.. those are worth repairing)
actually the bump description is pretty apt.its the amp cutting out because of an overheated transistor likely.if it was mine id probably play give it a shot.transistors for those are cheap so if it doesnt work not much is lost.
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