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O2 amp feedback/clicking issue

post #1 of 7
Thread Starter 

Looking for any ideas. I just built an O2 portable amp and it powers on, but it is not passing audio. Only a loud clicking sound. I checked everything and it seems fine. 

post #2 of 7
Quote:
Originally Posted by adupree View Post
 

Looking for any ideas. I just built an O2 portable amp and it powers on, but it is not passing audio. Only a loud clicking sound. I checked everything and it seems fine. 

 

This indicates O2 is not receiving proper power input.

 

Double check R25, R9, as well as all diode orientations.

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post #3 of 7
Thread Starter 

They are testing fine.

post #4 of 7
Quote:
Originally Posted by adupree View Post
 

They are testing fine.

 

Pictures? The problem must originate in the power management section of the schematic.

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post #5 of 7
Thread Starter 

 

 

At the battery terminals I'm getting 29.5V

post #6 of 7
Quote:
Originally Posted by adupree View Post
 

At the battery terminals I'm getting 29.5V

 

Almost 30VDC? Isn't that way above spec?

post #7 of 7
Thread Starter 

Should be 24V

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