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Re: U1 fried


 

One of the things that might help is to install a resistor on the jack that comes int play when you remove the speaker plug. This could be anything from 6 - 30 ohms as the Impedence of the TDA is Bout 32 ohms. If you installing it at the pin that makes contact with the tip when the plug is removed and connect it to GND, this would assure a load on the output at all times. I would recommend a value around 8 - 16 ohms as that is two of the most common impedences in speakers, The other is 4 ohms and I would stay away from this value as the current is going to go way up on the 2822. ?Good luck.?
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72 and God bless
KD4EPG

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