Mackie powered loudspeaker

[lennytwo]

Hello
I am repairing this equipment which uses a switching supply...the Driver IC for the power Mosfet has written on it "1271a"...I have searched and searched for this IC but to no avail...nothing on Internet, it is a 8 pin surface mount anybody know what this IC is?

[vtech]

In searching for a specific part number, in general, "1271.." could be anything from part of a valid number to a "house" number? without reverse engineering or more information it is difficult to tell for sure.
You may have a better chance searching for the specific model schematic or perhaps a better response by posting in the Mackie's forum.
http://forums.mackie.com/scripts/forum/ultimatebb.cgi
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[torbjorn]

Typically, it is impossible to get any schematics or service information for Mackie products. But as far as I know, they don't use any strange "house" numbers on semiconductors.

Check if there is any manufacturer logo on the driver IC, this could perhaps give some clues about which part it really is.