There is a red round shaped control switch at the bottom part of the dc14,it is used when you are using the tools to vacuum with,it says "on" and "off"on it.
Ken Rogers
February 2009
Look at http://www.sparesaver.com/help-and-support/dyson-section/dyson-hints-and-tips-451/dyson-dc14-hints-and-tips-475/burning-smell-carbon-models-with-brush-control.html.
This will let you complete dissassembly to remove motor - I have just done it!
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Try fixfault.com to fix vacuum cleaners.