my oral-b has a little problem...............................
direct after a charge , when i want to use it , the brush indicates the need for a charge !!!
sounds to me that the battery is going .
does anyone have a service manual or experience in replacing the battery.
Braun only offers a replacement hand-piece........................
nitro2
need
some of my brief may be of use
Braun Oral B electric toothbrush , 336 base marking Sluggish motor 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 with a steel rule on edge, then dart tip to get inside these, and no wires to break, so worth a bit of time to repair. Make an index mark to realign on assembly, 1/8 turn back to start. Interesting , for those with mechanical bents, double crank and rubber mechanism creates the motion. Initially checking charger, with DVM Fluke 77 and 1mH small choke measured 0.45V ac, 9 turns of wire around the location spigot gave 0.1V ac, 0.6V when inside and the coil disconnected and laid over the spigot, no account made for HF not 50Hz. Monitoring 1.2V nicad 1.24V drops to 1.16V in use.
-ve terminal to charger coil end. Coil 7.5R. coil, thin O ring, paxolin ring then conical spring. One motor terminal just for mounting purposes. Good wodge of silicone grease on the active end before fitting back in the casing.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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Tanks,
i will give it a try .
when the bottom is removed the inside slides out like a tray ???
nitro2
Not sure if this applies to your unit but some units when disassembled are designed to break the internal wiring. So pull slowly and watch out for any tension from wires that might break easily.
Good luck.
-- David Farber David Farber\'s Service Center L.A., CA
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Thanks for the additional info ,
I have repaired several old-style oral-b's , they have 2 little wires which go from the charging adapter to the electronics, if you don't pull them , they will survive .
BUT you have to take the internals apart in order to remove the defective battery , which in that case is a 2,4 volt unit made of 2 x 1,2 nicd cells.
Those are diameter 17mm and length 58mm , made of 2 SANYO CADNICA N-500 ( 500 mah ) cells
Mind, those are soldered to the main pcb ........................
But i have never tried the thriumph , so would like to have as much info as possible ( triumph is a bit more expensive as a standard oral-b )
nitro2
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