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Peavey Mixer: PV6-USB: Schematic and repair

Started by paelgin, April 09, 2020, 12:11:02 PM

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Howdy all.  Attached is the PDF schematic of the Peavey PV6-USB mixer.  I am posting this as well as my journey, struggles and questions as I work to repair a broken mixer.

I have seen online comments regarding power supply for these older mixers: it is critical to note that the non-USB models require a 16 volt AC adapter, while the USB models require a 15 volt DC supply.  I will also post a picture showing the input requirements shown on the back of the mixers.

The mixer I am trying to fix had a serious power problem which blew the NCP3063 boost/buck/inverting converter surface mounted chip apart.  It was so bad that it burned the top layer of the board down to the fiberglass matting below (I think I have a picture; if so I will include it too).

My questions will start in my next post as I work with my meter to see why the mixer works but the USB does not.

Phil in gorgeous Young Harris, Georgia, USA