|21st December 2012, 02:56 PM||#31|
Join Date: Dec 2012
Location: Homeless, sweet homeless.
From your this post, one thing that comes to my mind is the speaker connections as I guessd from your photos are not right ( although I am right as per datasheet reference). Perhaps, thats why tone control has no effect.
I was studying some LA4440 circuits and PCBs on net. And I found a board where the speaker wires are directly connected to PIN 10 and 12.
Please see this link: LA4440 Amplifier Circuit ~ CircuitsTune ( FIG:2)
and this , for PCB reference.
LA4440 audio amplifier in Bridge mode | CircuitsDIY.
But to my utter surprise I have not found such an example in the Datasheet that I studied.
And more I am not sure about the value of the caps used in your circuit.
But I think you should carefully study the links that I gave and take a decision.
All the very best.
Warm regards, Som
Last edited by csom; 21st December 2012 at 03:11 PM.
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