Need some help with a dead car audio amp...... - diyAudio
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Old 14th November 2003, 01:29 PM   #1
JCoffey is offline JCoffey  United States
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Unhappy Need some help with a dead car audio amp......

OK, I've owned a pair of BK Butler Tube Driver 750's for about 5 years now. I love my amps, and cant even begin to be able to afford to replace them with the new Tube Driver Blue. One still works fine, but the second one has just died. It made no noises, no smell of smoke, and when I pulled the top off of it, there was no visibly damaged components or scorch marks on the PCB. All the cabling is fine, no blown fuses. Where do i start looking to locate why an amp is getting no power. I really need to get my baby back. This is killing me!!!!
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Old 14th November 2003, 05:30 PM   #2
JCoffey is offline JCoffey  United States
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any thoughts?can any electronics repair shop do this if its over my head? I cant see it being too dificult to figure out on my own, but could really use some pointers.
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Old 15th November 2003, 01:37 AM   #3
EE_Mark is offline EE_Mark  United States
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Default Do you have a schematic?

or a voltmeter or a scope? Start by looking at what is different in the working amp from the non-working amp.
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Old 15th November 2003, 02:49 PM   #4
JCoffey is offline JCoffey  United States
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Ya, I was planning on getting a multimeter and pulling both amps and going over each component one at a time, testing the good one, then the bad one to see if I could figure it out, but was curious if there was an easier way......
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Old 15th November 2003, 03:33 PM   #5
EE_Mark is offline EE_Mark  United States
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Default Easier Way

Quote:
Originally posted by JCoffey
... was curious if there was an easier way......
Yes, get a schematic and an oscilloscope.
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Old 15th November 2003, 03:52 PM   #6
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check the input diode....could have just gone...do you have a camera?? take a few shots and post them here...
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Old 15th November 2003, 08:00 PM   #7
JCoffey is offline JCoffey  United States
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Here go some pics that I took. They arent the best, but my cam doesnt do real well close up....
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Old 15th November 2003, 08:02 PM   #8
JCoffey is offline JCoffey  United States
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next
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Old 15th November 2003, 08:04 PM   #9
JCoffey is offline JCoffey  United States
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I like how he uses a bar to hold the chips down with a rubber strip in between
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Old 15th November 2003, 08:07 PM   #10
JCoffey is offline JCoffey  United States
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and another
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