Please advise?

In the picture, circled are Vbat+ and Vbat- nets.

I bought this Oral-B electric toothbrush about two to three years ago. It has been one of the most valuable gadgets I've owned.

Last week, I put the brush on the iPhone's wireless charging pod during my business trip since I didn't bring the Oral-B original charger

When I put the brush on the phone charger, the LED lights of the brush were on, and it looked like charging.

However, the LED lights turned off after about 5 to 10 seconds on the charging pod, but the brush was still working normally."

After I came back home and connected the brush to the original Oral-B charging pod, there was no response at all.

By the way, I cross-checked the original charging pod with another brush, and it is just fine.

In my opinion, the charging system of the brush could be damaged.

Link: https://photos.app.goo.gl/qtPJvXpQGDujMR...

Can I get some help in here?

Thanks,

Ryan.

Is there others Sonicare models like protective clean 6500 where you don't have to desold the battery ?

Thanks

I just took apart my Philip Sonicare HX680C toothbrush in order to tighten the head shaft screw, as it has been very loose lately - common complaint. To my surprise, however, when I opened the toothbrush, the screw and washer that are supposed to be there have seemingly vanished entirely. With my micrometer nowhere to be found, would anyone be able to tell me what the appropriate dimensions of the screw and washer? Thanks!

I have an IO (not sure which model but has the LCD display) which stopped working completely. Sometimes you press the button and it starts up, you see the intro animation for a second or two and then dies again, usualy doesn't do anything for a few hours after that when you press the button again.

I took it apart and the battery seems fine (3.8V), the button itself is also working. I wonder if this is a known fault and if it's realistic to try and fix it, or if it's going to be one of these microcontrollers or just any one of the tiny countless unlabelled resistors/capacitors and I'm better off just throwing it in the bin.

Thanks

⟐ Commented January 06, 2024 at 22:51 MST

⟐ Edited December 05, 2023 at 2:05 MST

However, there is one remaining issue which results in a lot of noise. The triangular shaped part where the metal head is attached using a screw is rotated as shown in the image below (red arrow points to rotated triangular shaped part):

This is due to an issue "lower down" in the toothbrush where the metallic driver (blue arrow in image below) - which is directly connected/linked to the above mentioned "triangular shaped" part - is rotated as well.

By forcing quite a bit I can rotate it back to "normal" position, however, as soon as I switch on the toothbrush the whole thing gets stuck again in the rotated position.

My two possible explanations so fare are that a) the magnetic force in the two magnets has somehow changed which results in a rotation or b) there was some abrasion or similar on the surface of the metallic driver which results in this rotation.

Any ideas on how to fix this would be highly appreciated!

My toothbrush lights are blinking and the toothbrush won't fully turn on. When the button is pressed, a quiet whirring sound happens, but the brush head does not vibrate. Any ideas?

Claire

⟐ Commented October 14, 2023 at 9:13 MST

Is anybody can tell me what is the purpose of this chip (probably a PIC or something like that) and how to confirm if the problem really come from this one ?

The battery is good, the motor works (as soon as I put 1.3Vdc on the motor, the head start to wiggle. If I bypass a transistor controlled by this IC just beside it (shorting emitter and collector), the toothbrush start normally (until I remove my short).

I know it is just a toothbrush, but I'm really curious about the fonction of this IC an I want to learn. Thank you

⟐ Commented October 10, 2023 at 8:42 MST