Question about Mackie SWA1501 Subwoofer
On my Mackie SWA 1501, the speaker pops when powering up, but the signal light remains on even with nothing connected, and when there is something connected, I get no sound. I have checked the 3 internal fuses I can access from just pulling the power amp, but none appear blown. Are there additional fuses under the input board I should check?
My guess from my trouble shooting thus far is I have an input problem... perhaps a blown fuse if there is one under that input board or an ic chip or capacitor on the input may be out... any ideas?
T14 is part of the +15v power supply that feeds the input board.
It is actually a transistor.
If this is the only problem on the board, then this transistor could be resoldered back on but you will have to make sure it tests OK and it attaches to the heatsink the same way it came off. ie make sure it is electrically isolated from the heatsink
It seems if there is no fuses blown on the power amp board you might be one of the lucky ones.
In my opinion this amp is a clever design but is under-engineered for robustness
Posted on Sep 16, 2008
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