HK 206 PC Speaker Popping Sound

[bobcat2000]

Hi Guys,

I have been using a pair of HK 206 speakers for years.  No problem no thing.  It sounds and works great.
I always turn it off by turning the volume dial when I am done listening to the speaker.

The other day, the static built-up in my butt was too high.  I got a big spark when I touched the volume dial the other day.
The speaker still work but every time I turn it on/off, it makes a big pop noise now.

I probably ran thousands of volt through the plastic knob to the pot and somewhere to the transistor and to the ground when I touched the knob the other day.

May I ask what may be broken inside?  It is old so I don't want to crack it open. I will probably break the old plastic housing.
It may not have anything look burnt inside anyway since it is still working without any problem.

Thanks!


https://www.amazon.com/Harman-Kardon-Computer-Speakers-HK206/dp/B00577RM8Y

[bobcat2000]

Ah!  I found this.  There is no transistor inside.  It has a TDA 1517a amp.  So, where does it shorted to make that popping noise?  Inside the IC?

https://youtu.be/OHz-mC_xyzA

[fzabkar]

https://www.nxp.com/docs/en/data-sheet/TDA1517.pdf

"No switch-on/switch-off plop (sic)"

[bobcat2000]

Thanks.

So, I know what goes in to the chip and what goes out from the chip.
How do I tell why there is a big pop when I turn on/off the power?

The cap discharge too much to the speakers?