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Tutoriels de réparation, démontage et informations de diagnostic pour les brosses à dents électriques Oral-B Type 3771. Identifiée par le numéro de type 3771.

3 questions Voir tout | 1 pièce Boutique

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Oral-B Braun Toothbrush Motor Not Working

I have the following toothbrush: Oral-B Braun Genius X Type 3771

The toothbrush can be fully charged, battery lights are working normally. It can be switched on, all indicator lights are working, pressure sensor light is working fine, timer light is also working.

The problem only is that it just won’t spin/vibrate. I’ve replaced to a new toothbrush head, but still doesn’t work. No humming/sound from the body at all.

I am willing to attempt to repair it by myself. My questions are:

  1. I’m suspecting motor problem inside, is this correct?
  2. Is it repairable?
  3. Is there a guide?

Thanks for your time. Hope you’d help me out.

Répondre à cette question J'ai le même problème

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4 commentaires

Hello together,

I have a similar problem.

When the toothbrush is out for 5 or 10 minutes I'm able to turn it on, at the most times.

It goes on for about 2-3 seconds.

After that, it goes off. The light is still on. But nothing happens anymore.

Sometimes i car turn it on again, sometimes not...

The SMD is okay, the battery is fully charged with 3,88 V.

Any ideas?

par

@el-barto21

I would start with a new battery.

Even though it shows the correct voltage this doesn't mean that it is OK when under load.

You may be measuring the open circuit voltage and not the voltage when it is "working"

par

I have the same problem and I can see how the motor stop working. They design the thoothbrush head to have hole so that it will go down the metal rod to the motor which lead to killing the motor in 2 or 3 years of use.

par

motor sounds like its working just not twisting

par

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I found that toothpaste remnants can jam up the axle that sticks out of the body and goes inside the brushhead. Clean it up, and use pliers to move it the way it normally would (it swings about 30 degrees)

This worked on mine. YMMV

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5 commentaires:

Thanks but, that did not work. The brush stopped working while in my mouth. I suspect a blown fuse or water related short circuit. Have reviewed a YouTube video and let’s see if I can tinker with it to fix it

par

FIXED. Open the Oral-B Genius brush and replace or short the smd fuse (marked as PP). Watch the YouTube video: https://youtu.be/O4iEAWibEsg

par

I also fixed my Genius X but without needing to replace the fuse - just pushing down hard on it whilst the device was activated (main brushing light on) and it suddenly came to life. Not sure what failure mode of a fuse explains this behaviour but worth a go as it saves shorting the fuse or waiting a long time for a replacement part.

par

George's method worked for mine! Pushed hard on the fuse while having the toothbrush on and it came to life!

par

I took the advice of Spikey2 and used pliers to twist the shaft. There was a pop and some dried toothpaste let go. The motor came to life and all is well.

par

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Hi,

Is it humming but not spinning when you try to turn it on?

If it is humming, check if you can you gently turn the spindle by hand to see if it moves or even if it starts to turn by itself (if the power is switched on) once you try to turn it.

If so it may be that there is not enough power to initially start the motor rotating or the spindle is jammed somehow.

If not you may have to find out why the motor is not getting any power.

Couldn’t find a guide for your model but here’s a video that shows how to replace the batteries in a Genius 3765. Hopefully this is close enough to your model to be of some help. At least enough to open the toothbrush so that the motor action can be checked.

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8 commentaires:

I’m having the same problem with my toothbrush, which is the same model as yours. Did you find out the problem and we’re you able to fix it?

par

Same model same problem. Everything lights up as normal with fully charged indicators and yet motor does not vibrate or move? What the heck. Now how to fix it?

par

Why do people constantly ask questions that are already answered by the OP in the question??????????????

par

Same model same problem! Does anyone have a fix to this problem?

par

Same model same problem

par

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It’s common issue with oral b genius. I’m not sure about other countries, but in uk you can send it back under guarantee and you will get new one within a few days.

But, also I’ve tried to investigate the issue myself and I thing the problem is with small smd component (I thing this is thermistor) which is connected to transistor which power the motor.

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2 commentaires:

yes. mine was out of warranty by 2 weeks. I posted it to a guy in Lithuania who made a YouTube video showing a repair. unfortunately the repair only held for about 3 months.

par

I just found that this is smd fuse with code N (2A) 0805

Previously I send it under warranty and get back new one. The component (fuse) in this which I send back had code “PP “ on it so I thought that it might be a thermistor or so.

But the new one had same issue after a while, but this time I’ve fixed it myself (new fuse soldered), 5 minutes job if you know what you do.

par

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hi,

It is the second time I have the very same problem! Were you able to fix it?

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Yes I was, with the YouTube tutorial.

Watch the YouTube video: https://youtu.be/O4iEAWibEsg

par

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