Open an electric toothbrush?

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Have an older Broxodent electric toothbrush. The connection where the
cord enters the brush is loose. Work-around is to hold cord to case
with a rubber band.
But I would like to do a real repair. First step is to get inside that
end of the brush. So... Has anyone opened one of these puppies?

TIA

LB

 

[Steve Nosko]

The one I opened was rechargable. I did it carefully so as to not destroy
the lower buisness end where it sat on the charging stub. It was water
damaged, but I found out that it uses 20 KHZ to couple into the battery
charging circuit.
Steve N.