Braun Oral B electric toothbrush , 336 base marking

[N Cook]

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/

 

[N Cook]

N Cook <diverse8@gazeta.pl> wrote in message
news:gal8ak$ncd$1@inews.gazeta.pl...

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/