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El Oral-B Triumph v2 es una serie de cepillos de dientes eléctricos. Los modelos incluyen el Oral-B Black 7000 (representado y utilizado en la guía) así como cepillos con los tipos 3761, 3762 y 3764.

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Runs down and stops in about a second

My toothbrush runs down and stops in about a second. I fixed the problem a few months ago by unsoldering and then resoldering the battery. I have checked the battery voltage during the switch on, slow down and stop phase and it remains constant at about 3.7V so there would seem not to be a problem with the battery. When the problem occurred before I found that bypassing the MOSFET caused the motor to run normally at full speed, so this seems to be a microprocessor issue. I have tried resetting the brush by holding the power button for ten seconds. There is no water inside.

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2 Respuestas

Fixed - there is a polyfuse marked PP which is Bourns MF-PSML300 rated 3A and it was dropping several volts. Bypassed fuse with multimeter on current setting, toothbrush works and meter reads 0.5A so fuse clearly faulty. Bridged fuse with solder for permanent fix. It is possible to buy replacement fuses but they are expensive and not easy to fit.

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bypassing a fuse is never a good idea for a long term solution. SMD parts are not simple, but this part is big so it should not be a big problem.

These are 0.18¢ each - min quantity 10.

https://www.aliexpress.com/item/22518327...

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Tim estará eternamente agradecido.
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