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Electronics => Repair => Topic started by: loouser on June 04, 2023, 09:39:53 pm

Title: why is my problem fixed when I ground caps?
Post by: loouser on June 04, 2023, 09:39:53 pm

I have an audio device with two caps around an ic amp JRC2073. I replaced these two caps and the no audio fault remained, however by chance i shorted the exposed caps of these two with a finger each on one hand and got audio. My hand resistance was about 0.4mohn so i tried large resistor across instead and got audio too, why is this please? all the solder joints look and test good.

Title: Re: why is my problem fixed when I ground caps?
Post by: Psi on June 04, 2023, 09:59:38 pm

You would need to find a circuit for that JRC2073 (maybe from datasheet), or trace out how it's connected in your device.
Then show us which two caps and which side of the caps are being connected to make it work.