Question about Mackie SWA1501 Subwoofer

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Thermal light came on at power up and stayed on. No sound came out.

Hi, My swa1501 was working fine 3 days ago. Tonight when I turned it on the Thermal Protection light came on and no sound came out. I swapped the EIC cord just in case it was bad and I left it on for a while to see if the thermal circuit would reset like it's supposed to. Neither solution worked. The unit was cool and had plenty of airspace behind it. Can you point me in the right direction? Thanks, Chris

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Posted on Jan 02, 2017

XSdB
  • 80 Answers

SOURCE: Mackie SWA1501 Base Bin - Circuit Boards burnt.

They are not publicly available. Mackie authorized service centers are the only places that will have that information. The amp (if it has failed) requires a bit of skill to rebuild, and up to 100$ in parts alone. (not including the speaker driver if it's blown). I have repaired several of these in the past, and they aren't that simple. There is also a service bulletin about 2 diodes that usually need to be swapped with one another because of a defect during manufacture (the parts were installed incorrectly). (One is D20) if you rebuild the amp, and fail to address the diodes, it will fail again very shortly.

Posted on Jun 12, 2009

  • 1 Answer

SOURCE: Hi, my does not power on. When I turn on the

Hay asanchez23, had the same problem, turned out to be the switch. I just moved the wires on the switch to the other poles. (switch is a Double pull, single throw) it only uses two to the four poles.

Posted on Jan 23, 2010

Testimonial: "I got such a terrible year at work that I abandoned my subwoofer and never checked back until today. I followed your advice and it worked! Thanks!"

turinband
  • 7 Answers

SOURCE: mackie 450 thermal light on no sound

could you give some more info? what are your running into your speaker? and how exactly is it run? once we weed out common issues like switched up cables, than we can move on to internals.
which on that note, I think this is a manufacturing defect


here's a link to the schematic if you want to go poking around the circuits.....


http://www.mediafire.com/?myion3zkxn3


or
http://www.mediafire.com/file/myion3zkxn3/Mackie-SRM450 actspk.pdf



take a resistance test between D56 pin1 and Q35 pin2. thats where this issue seems to be stemming from from ones ive worked on. I have know it to be an internal track that was broken and needed to be glued back down. definitely not the first time ive seen this....

Posted on Dec 08, 2012

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