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Chip Amps Amplifiers based on integrated circuits

Bonzai CMOY.. Dead on One Channel
Bonzai CMOY.. Dead on One Channel
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Old 1st July 2012, 05:38 PM   #11
Humanjava is offline Humanjava  Germany
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Join Date: Jul 2004
Location: dresden
Checked the caps, even with out caps I should still get the correct voltages..
Took the whole thing apart to double check for cold joints etc. Must be something got killed on the actual board so I write this off.
It would be nice if there was specific areas to test but I guess I will just build it back up on a bread board, which I should have done in the first place. This actual kit is a bit crap in its layout where you are supposed to solder caps and battery leads on a set of jumpers.

Money wasted lesson learned on this one.

IMHO if you are going to design a circuit board there should be no point in jumpers.
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Old 1st July 2012, 05:46 PM   #12
kumori is offline kumori  Europe
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Join Date: Mar 2011
I thought the same, the board layout seems not be thought through to the end.
Good luck
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Old 3rd July 2012, 05:47 AM   #13
Puffin is offline Puffin  United Kingdom
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Join Date: Feb 2006
Location: U.K
There was a thread a few years ago on RockGrotto.com about these amps. I seem to remember that the power layout was bad in that if one of the batteries died, it could induce DC into your headphones. There was a fix for it, which altered the layout.
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