AEG BSS 4823 - portable speaker - Crackling noise from one channel input

[Funkwarrior]

Hi all,
I have this portable speaker from my parish that I will to repair; a new one will be too expensive to afford.

This is it:


It came with no sound.
After I replaced the woofer which have the coil broken, it started to produce sound.
But only one channel input work fine, either the rca and the usb input.
These are the images of the boards and the video of the strange sound from one of the input panel:
https://photos.app.goo.gl/9eSUldPGWgDXI4Cw2
I hope someone can help me how to troubleshoot the problem.
Thanks!

[Funkwarrior]

Re: AEG BSS 4823 - portable speaker - Crackling noise from one channel input

Maybe it's easier if I put directly the images:
Front (preamp?)


Amplifier (on a Backplate)




Video with audio problem:
https://www.dailymotion.com/video/x6knv0u

I changed two capacitors that appeared with some leakage (visibles in 3rd image)

Also tested the resistors of both channel input of rca inputs and bluetooth/usb inputs and seems ok.

What other steps can i try?

[Funkwarrior]

Re: AEG BSS 4823 - portable speaker - Crackling noise from one channel input

Maybe someone can help me if he recognized the noise from the video?
https://www.dailymotion.com/video/x6knv0u

Any help is really appreciated, thanks!

[Andrew F. Ali]

Re: AEG BSS 4823 - portable speaker - Crackling noise from one channel input

What you have to determine is if whether the input is reaching the power amp or is the output section not working.