Braun Oral B electric toothbrush , 336 base marking
 

Anyone know if its 1.2V or 2.4V nicad. Easy enough getting inside, battery
looks like single cell as metal cladding continuous through the middle area
but could it contain 2 cells , one of which is shorted. Sluggish motor


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

Braun Oral B electric toothbrush , 336 base marking
 

N Cook wrote in message
...
Anyone know if its 1.2V or 2.4V nicad. Easy enough getting inside, battery
looks like single cell as metal cladding continuous through the middle
area
but could it contain 2 cells , one of which is shorted. Sluggish motor


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



Looks 1.2V , ps 2.4V and motor runs far too fast. looks as though it was a
switch problem. Running 2 to 3 amps and start 3 to 5 amps. Switch is paired
up , to take current, pair of 1mm wide prism point contacts, one being
dirty. For same reason that powering the motor from 1.2V via a pair of
croc-ended leads drops far too much power.

It is surprisingly easy to remove the base "plug" 1/8 turn to get inside
these and no wires to break so worth a bit of time to repair. Interesting ,
for those with mechanical bents, double crank and rubber mechanism creates
the motion

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/