Hi all, I'm trying to repair a cheap Fonestar AS-24U a friend has given me. I'm doing this only for learning purposes, so I already know it's a cheap unit and probably wont worth the effort. I don't have any other speaker to test the unit with but a car one, it's a 4 Ohm 150W JBL, for testing purposes I suppose I'ts ok.
The unit powers on normally and I'm able to playback MP3 from the SD card but the sound is only good at minimum volume (barely audible), if I push just a little the volume it crackles and pops louder than the music itself.
I'm a complete newbie (just know some basics) and didn't know from where to start, so I started from the beginning, the transformer that powers on the unit.
In the board where the transformer is plugged it says that the transformer should give gnd, 18v ac, 18v ac, 9v ac and 9v ac, tested with the multimeter with the amp powerred on it reads 19v 19v 1v 6,5v. Could be that the problem?
If that's the problem I supose the coil of the transformer is not serviceable and my journey ends here
Thanks in advance!!
The unit powers on normally and I'm able to playback MP3 from the SD card but the sound is only good at minimum volume (barely audible), if I push just a little the volume it crackles and pops louder than the music itself.
I'm a complete newbie (just know some basics) and didn't know from where to start, so I started from the beginning, the transformer that powers on the unit.
In the board where the transformer is plugged it says that the transformer should give gnd, 18v ac, 18v ac, 9v ac and 9v ac, tested with the multimeter with the amp powerred on it reads 19v 19v 1v 6,5v. Could be that the problem?
If that's the problem I supose the coil of the transformer is not serviceable and my journey ends here
Thanks in advance!!
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