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Old 11-07-2013, 04:13 PM   #29
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Join Date: Sep 2006
City & State: Valkeakoski
My Country: Finland
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Posts: 1,167
Default Re: Repairing Alesis M1 Active mk2 Monitor Speakers

There's a lesson in there - don't replace parts before you've found the cause of their demise

If "even" the 3844 blew, there's a pretty good chance it took one or both of the FETs with it.

I'm attaching the service manual; the PSU schematic is on page 14.

In these circumstances, in addition to having replacements ready for the obviously-blown parts, i might go as far as to pull all the parts from the primary and test them out-of-circuit, to make sure they're still ok, and that the measured values are (still) a close-enough match for the markings on them.
Attached Files
File Type: pdf ALESIS M1 ACTIVE MKII.pdf (663.4 KB, 362 views)
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