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I did post about this previously... I am only getting back to it now. I can't get a hold of the schematic. The customers complaint was the speaker was cutting out... When I had a look inside straight away I seen a loose capacitor, so I thought ahh ha!
Replaced it... 470uF 25v small cap. Fired it up and it was working, yay!
I had some music playing through it, started to think it sounded a little distorted so i decided il take the front grill off and check the speaker coil isn't rubbing. Before doing that I switched it off and pulled the power plug, it made this crazy High pitch noise. Now when I plug it back in with no signal going through it I get this loud horrible hum.
Not sure where to look from here, esp without the schematic. Can I assume the fault is in the Power amp stage?
https://m.youtube.com/watch?v=nZX228LoItk this is the speaker.
It has 4 separate pcbs under the hood.
Replaced it... 470uF 25v small cap. Fired it up and it was working, yay!
I had some music playing through it, started to think it sounded a little distorted so i decided il take the front grill off and check the speaker coil isn't rubbing. Before doing that I switched it off and pulled the power plug, it made this crazy High pitch noise. Now when I plug it back in with no signal going through it I get this loud horrible hum.
Not sure where to look from here, esp without the schematic. Can I assume the fault is in the Power amp stage?
https://m.youtube.com/watch?v=nZX228LoItk this is the speaker.
It has 4 separate pcbs under the hood.
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