Diagnostics and repair solutions of all known Philips Sonicare toothbrush defects in one video

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Content:
1. Opening of the bottom cap 01:20
1.1 Taking out from the casing 03:15
1.2 Working principles 04:55
2. Mechanical repairs 07:20
2.1 Electromagnet gap restoration 07:55
2.2 Broken head shaft 09:35
2.3 Loose head screw 10:30
2.4 Broken axis 10:55
2.5 Magnet twisted on the axis 11:55
2.6 Stuck casing button 13:25
3. Electronics repair (Water damage) 14:35
3.1 Removing PCB from Frame 15:40
3.2 PCB Traces 18:30
3.3. Fuse 19:11
3.4. ON/OFF button 19:21
3.5 MOSFET's 23:25
4.1 Repair of PCB Traces 25:25
4.2 Cleaning of ON/OFF Button 31:00
5. My diagnostics workflow 33:10
closeup of the PCB if someone needs component imprints:
drive.google.com/file/d/1yPLV...
If you would like to share some support for the channel or pour a beer as a thank you for successful repair: paypal.me/LetsFixItGarage
These are affiliate links, so if you buy directly from them small amount will be provided for channel support:
Rubber seals that I buy s.click.aliexpress.com/e/_ANI5D9
Rubber seal 1 pc s.click.aliexpress.com/e/_9IqPhH
Rubber seals with end cap s.click.aliexpress.com/e/_A9w9wR
Complete head for replacement s.click.aliexpress.com/e/_AkS0Zh
Complete head with new seal type
s.click.aliexpress.com/e/_9wGRop
If repairing of the water damaged tracks is not your thing you can replace the whole motherboard:
PHILIPS Sonicare diamondclean HX939P HX939W HX939B HX939V HX939L Motherboard s.click.aliexpress.com/e/_ASQ2zh
PHILIPS Sonicare diamondclean HX9370 HX9340 HX9350 HX9360 Motherboard s.click.aliexpress.com/e/_9fboHh
SMD fuses (2A) that I use in my videos s.click.aliexpress.com/e/_9Hsv9V
Smaller SMD fuses s.click.aliexpress.com/e/_9jKjOf
Soldering iron set
s.click.aliexpress.com/e/_AOsIIp
Soldering Iron tips
s.click.aliexpress.com/e/_9gjV6V
Screw driver and bits that I use s.click.aliexpress.com/e/_9wYDWJ
Screw driver and bits that I would buy now 😊
s.click.aliexpress.com/e/_ANI5D9
s.click.aliexpress.com/e/_AAZ275

Опубликовано:

19 авг 2020

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Комментарии : 212

@2LittleSticks 3 года назад

Hard to believe you don’t have more people following you. Precise, clear directions and in less than 30 minutes my $250 toothbrush is as good as new. Thank you, thank you, thank you!

@letsfixitgarage 3 года назад

Thanks for a good word! not sure how fast a repair Chanel has to grow but I assume majority of views are coming from one time "I have a problem" viewers.. sadly repair is not the hot topic maybe when the "right to repair" will get more movement.. and I should definitely improve by uploading some more content.. so if you have some possibilities to share the videos/knowledge I would appreciate the help :)

@adamschlang 3 года назад

Awesome, very well made video. Had to redo the trace under the power button, and now its back to new again! Thanks so much for taking the time to make such a great, thorough video about this!

@letsfixitgarage 3 года назад

Nice job! And thanks for a good word!

@ubercamel 3 года назад

Thanks for this vid, helped me fix a very loud hx9140. Undid the screw securing the coil and used a small flat head to make the gap above slightly larger then retightened the screw.

@petemc808 2 года назад

That's 2 toothbrushes fixed! Thanks. The underwater button clean for dried up toothpaste is genius! Very impressed with how well this worked. Thanks again! :)

@letsfixitgarage 2 года назад

Thanks! glad it was helpful, it would be interesting to see statistics of how much of the toothbrushes were repaired with help of these videos :)) share the knowledge ;)

@petemc808 2 года назад

@@letsfixitgarage Will do. I looked to try and fix these as my newer one broke. This is still under warranty. Seems like a very common problem. The 2nd one i fixed went much smoother.

@Hssengship 7 месяцев назад

Sir! Thank you so very much! Micromin repair and soldering is a huge skill. Diagnostics on this is gold!

@nojsanger1 3 года назад

You saved me time and money! I must have been dropped, increasing that gap where the magnetic coil is brilliant advise! Electric toothbrush life hack! Thank you!

@letsfixitgarage 3 года назад

Double win :) thanks for your feedback!

@NiennaInglorion 2 года назад

Thanks a lot for your wonderful repair videos, sir! I like to repair things myself and through repairing my old Sonicare toothbrush, I came to know your channel and your videos. God bless you for share your knowledge! Greetings from Germany 🇩🇪

@letsfixitgarage 2 года назад

Thanks for the kind word. Warme Grüße von Litauen ;)

@henrymuasml 3 года назад

thank you for your detailed visual instructions. I was able to get to it. very much appreciated!

@letsfixitgarage 3 года назад

Thanks for your Feedback, glad it was helpful!

@rodholland4186 Год назад

Big thumbs up. Helped me get the toothbrush apart (the hard part). The screw had backed out of the coupling near the head, and the gap had between the magnet and coils was non-existent. Both easy fixes.

@letsfixitgarage Год назад

Good job and thanks for a good word :)

@jaroslavtocek6026 Год назад

I was putting this repair away, but i finaly did it thanks to you.

@cerpinatic 3 года назад

Thanks - managed to fix 2.1 thanks to you! The part where you need to bend the plastic railing to get the two parts apart was a bit sketchy but it worked out. Thanks for saving me a bunch of money! :-)

@letsfixitgarage 3 года назад

Glad it was helpful :)

@janpisa666 Год назад

Thanks for inspiration - in my case it was bad spot-weld on plus battery terminal. I don't have spot welder so I carefully soldered it back to battery using soldering iron. Works flawlessly!

@letsfixitgarage Год назад

good job! Yes spot welding is preferred way to repair it, but soldering works as well. you just need to watch not to overheat it for to long and don't leave to much solder as the battery will not fit. just a hint for anyone reading these comments :)

@Kraassy1 3 года назад

Excellent repairing guide! Thanks!!

@letsfixitgarage 3 года назад

Your welcome :) good luck in repairs!

@pawek5479 2 года назад

Very useful video. I fixed my toothbrush with your instruction ;-). It was the most popular thru hole.

@letsfixitgarage 2 года назад

Good job. I do like these older diamondclean with through hole defects much better then smart diamondclean with multilayer protected PCB design.. when that one fails from water damage it's almost impossible to find the defected spot..

@egilschnack5256 2 месяца назад

Thank you! With your help I could repair my toothbrush with standard tools!

@Nytill 2 года назад

Thank you for your awesome videos! This is top quality content, very thorough. It's like watching the LockPickingLawyer, but with toothbrushes. The ToothbrushPickingLawyer? :) Anyway, this enabled me to fix an old toothbrush that I thought was gone for good. Thank you so much!

@letsfixitgarage 2 года назад

Wow to be compared with the best.. I'm a little bit more humble about my knowledge, but need to check if the name is not taken ;D thanks and share the knowledge!

@ialocin9828 3 года назад

perfect video, very good! Thank you.

@emawaldi 3 года назад

Your video is completely wonderful👍

@letsfixitgarage 3 года назад

Thanks!

@viachy 3 года назад

Thanks , helped me for my vibration problem

@gelderm92 Год назад

thank you so much for this amazing video!!

@nikolaytotev1 3 года назад

Thank you! Great effort, really appreciate your help :))

@TRipleJP93 3 года назад

Seeing where the clips are located made it a breeze to disassemble. That's a 200$ toothbrush Fixed. Thank you

@raykin6834 3 года назад

Thanks to this vijeo, my toothbrus now has good vibrasun

@szmitu123 2 года назад

Thanks for this video!

@letsfixitgarage 2 года назад

Your welcome :) good luck with repair!

@angelavasquez7610 3 года назад

Thank you, thank you!!!! I fixed it.

@avdmer 2 года назад

Thank you very much. I had the "magnet gap" issue (suspect the toothbrush was dropped). It was a quick fix thanks to your video. 1 to 2 mm gap? I set mine to 0.4 mm using a thickness gauge from my garage and it seems to work as before.

@letsfixitgarage 2 года назад

Yea.. I would call that fear of camera :D haven't prepared the right digit beforehand and when the time came just said 1-2mm. 2mm is really to much 0.5-1mm is perfect. If it's to small you will hear it and to much you will have weaker vibrations :)

@avdmer 2 года назад

@@letsfixitgarage Thanks for the feedback!

@ph1643 3 года назад

Great videos sir! Really good video quality and great repair guides! My tootbrush only does one single, short vibration. The "Clean"-LED flashes at the same time. But nothing else. Any idea?

@letsfixitgarage 3 года назад

Whenever I hear these symptoms I suspect water inside.. take it apart and the motherboard off it's casing to inspect the back side. And check my other videos for water damage repair. Other suspect could be the battery try to exchange or power up from external 4v power supply.. hope this helps!

@lunalovebuzz 7 месяцев назад

I haven't fixed it yet, but your videos are SO HELPFUL. When I first opened the brush I felt overwhelmed but I feel more confident now. I haven't found the problem yet though. My seal rubber was very damaged and there was rust on the magnet, but the board seems okay. The toothbrush stopped working completely, no vibration and no LED lights. Do you have a suggestion?

@letsfixitgarage 7 месяцев назад

Remove the motherboard from the frame a lot of times main damage to the motherboard is on the under side. Then check with multimeter all the points that I showed in the video. Water damage is tricky but doable ;) good luck!

@merakilous21 3 года назад

Thank you again for your fantastic videos. It means fewer toothbrushes end up in landfills unnecessarily. You spoke about detaching the battery on the PCB but is it okay just to take the battery out?

@letsfixitgarage 3 года назад

Battery is soldered in. So to take it out you need to desolder battery legs on the board..

@123Poppa321 3 года назад

First of all I would like to thank you for your fantastic video on the philips sonicare. This is by far the best content I have found on the net. With your help I was able to repair several toothbrushes within my family. However, I still have got three brushes with a blown fuse F1. In my point of view the F1 fuse is not self healing. Am I right that on a functioning brush the F1 should have connectivity? I would like to replace this component. In one of your videos you said that you ordered spares for the F1 fuse. Have you got a specification for the F1 fuse?

@letsfixitgarage 3 года назад

Thanks for the good word. If I remember correctly it has a letter P on it so internet says it should be up to 3A I ordered a lot of different sizes from AliExpress and still didn't got the correct size (smd measurements has imperial and metric scales too.. can you believe it..) so I used the smallest fuse that I got and it works. Yes a good fuse has to have continuity. But if it blew, it could also indicate a burned MOSFET.. check those too..

@123Poppa321 3 года назад

@@letsfixitgarage Thanks for the quick response. Really 3A? I did not investigate yet but I was aiming for a 500mA fuse. Thank you for your advise about the MOSFET. I thought the fuse was there to protect the mosfets from getting burned. But now I'm going to check those as well.

@letsfixitgarage 3 года назад

@@123Poppa321 yes I was surprised too but you can check the writing on the fuse and Google "smd fuse values" it will be 2A or 3A, fuse has to take in to account peak values.. And usually fuse burns when something bad happens on the board to protect from burning everything down :) and from what I saw usually (but of course not always) MOSFET is the cause why the Fuse burned through.. and if you had water inside be sure to check pcb tracks I have a whole series on water damage repair :)) if needed check them out..

Год назад

You have an extra motherboard for the diamond clean version? I got mine working again but then I saw smoke from the mosfets. Needs a new board was a water failure. Happy to send it to you if you want parts too and think it is just failed. I bought it on ebay and the person pretty much lied about the condition it had obvious water damage didn't turn on no charge light etc. Battery was totally low-- recharged it and then it went up in smoke when I resoldered it.

@letsfixitgarage Год назад

Yes I have some. Write me to letsfixitgarage@gmail.com

@imtiazshahed944 3 года назад

your videos are fantastic. I have managed to open the back cover of the casing, the hardest part is to take off the PCB from the magnet part. Are there any tricks so can pull it apart safely to remove it? Thank you in advance. cheers

@letsfixitgarage 3 года назад

Thanks hope it helps a lot off people :) yes it is discouraging first time when you do it. There is no trick just pull it apart strongly. There are two plastic clips beneath it, but even if you break them when you put everything together the bottom cap will hold everything in place so don't fear and pull it apart ;)

@vlotty9 2 года назад

Great videos! I have an HX8910 where the battery was old and not holding charge anymore, otherwise worked fine (with some repairs to the tip assembly). I replaced the battery, and did not know to desolder JP1. Now when I press the main button it does not turn on at all. If I place it on the charger, it will flash like it’s charging, then after about a minute, all LEDs start flashing very quickly. Tested new battery, it’s showing the correct voltage. Fuse shows continuity, buttons also. My board looks different than the ones in your videos (8 programming pads, no test pad next to power button, 6-pin MOSFETs). No sign of water damage on the top (rubber seals and all were in good condition). Haven’t taken off the board yet to inspect the back but want to see if you might know what’s the issue before I do that and maybe further damage things! Have you worked with this board before, or seen the issue with not turning on and all lights flashing quickly on charger after 60s? Did I maybe short something when replacing the battery? Thanks for any help

@letsfixitgarage 2 года назад

It could be a lot of things.. maybe charging chip is dying maybe some traces are damaged and this gives false signals to the chip.. I have repaired one like yours but not with your simptoms.. visual inspection for any obvious damage on both sides of the board and maybe check if it discharged on its own - that could indicate some short circuit on the board.. sorry to say it, but it's easier to diagnose board that's completely dead then when it's misbehaving..

@jeanbenaim6684 3 года назад

Hi. Great videos for self repairing. My 2 years old toothbrush HX9332/04 has 2 issues : It's sometimes starts by itself (especially when it's on its base) and when I uses it, it' stops after 10s. What is your advice to repair it ? Thanks.

@letsfixitgarage 3 года назад

Open it. you will find water inside. Check my videos for water damage and there are high chance it can be repaired

@leoport Месяц назад

Thanks a ton for your vids. Amazing how much you empower people to reduce waste by DIY fixes. At around 19:17 you talk about the fuse. If I'm not getting a continuity tone when testing, do you know what would be a replacement fuse? I have hot air, but don't know where/what to buy.

@letsfixitgarage Месяц назад

Have some example fuses in description of the video. Check them out. I would install 2a fuse although 1a fuse holds as well..

@leoport Месяц назад

I took a look at the Fuse links in your description. The 2A one pointed to 0805 fuses; I got some but they are a bit larger than the one it’s supposed to replace (also, the one that failed has a P printed on it… does that mean it’s 3A?). The link to the “smaller fuses” in your description is no longer working :( - can a 8050 actually work here? Thanks!

@letsfixitgarage Месяц назад

Yes they are slightly bigger as original but if you apply flux and have good magnification to see where the fuse lays it's possible to solder it in, not to difficult. 2A is fully enough. Have made some measurements that it runs normally at 600ma if I remember correctly. There are some older comments with precise digits.

@davekirkman406 2 года назад

Hi great videos I have a question please I have a sonicare hx993s , I replaced the battery and all was perfect until I went to back into the body it started cutting coming on and off, now it is totally dead ( no power and no lights will come on) it will still charge, do you know what I may have damaged? Thanks dave

@letsfixitgarage 2 года назад

Why did you replace the battery in first place? From your description I would say water damage and especially in the on/off button. Check my water damage videos there is a lot what needs to be checked in case of water damage..

@mayateth347 Год назад

Great description! I have bought toothbrush for kids, HX6350, is there any way to turn off the Bluetooth? Thank you!

@letsfixitgarage Год назад

Don't use it?.. :) what do you expect to achieve by turning it off? Sorry but don't think that's possible..

@florianrehmet3508 3 года назад

Hey - thanks to your great work showing how to open these brushes - had it done now to my diamond clean (the Grey HX993S one) and repaired the broken head sealing - when I put all parts back together I realized that the pressure control doesn't work anymore... Before I disassembled it does a great job to me... Do you know to fix that too? Hope you could help 😉

@letsfixitgarage 3 года назад

Either the ribbon cable to the sensor got damaged or if you took it off maybe it peeled off after assembly.. disassemble it and check the sensor next to the magnet

@florianrehmet3508 3 года назад

@@letsfixitgarage thanks for your fast answer and help - i would like to send you a Photo of my device in you would offer a Bit More assistance to me because i couldn‘t identify the Sensor itself - Could you Write me an email for getting in contact?

@letsfixitgarage 3 года назад

letsfixitgarage@gmail.com

@DavePawson Год назад

Great detail, thanks. Mine: Symptoms, All lights flashing when on charge. Brush does not move when switched on. Have replaced the battery. Any suggestions please?

@letsfixitgarage Год назад

Difficult to say.. was the seal ok, no water inside? As usually water damage is on the back side of the motherboard. If that's not the case short out the fuse maybe it's causing the problem..

@arjfca Год назад

Hello and thanks for the great video. I got a Sonicare HX6730 with a different problem. When started, i will hear a buzzing sound, but the head will not vibrate. But the head will vibrate shortly when the brush give the timing signal to change the brushing location. I could also get the vibration when i press the button for 20 seconds while the brush is on the charger block. The batterie showed 3.6v and I don't seem to have a short on the mosfet. Since I could get the momentery vibration , I could say that the electronic drivers are ok. It look like a malfunction of the frequency output from the MCU. Is there a way to reset the board to its original value?

@letsfixitgarage Год назад

I don't know a way to reset it except to cut the power but that will not help in your case. There is a video (English and German) from a German guy with a detailed guide how to reflash the eeprom of this brush. Sorry I don't recall his Chanel name but if you will not be avle to find it write a comment I'll look it up We exchanged some emails and he was quite deep in this topic..

@Osi356a Год назад

Hi, many thanks for this video! I've a Sonicare HX939B which was dead, no vibration, no lights. After following your video and opening it up, I could see some water damage. I've ordered a new pcb and just installed it. But it's still dead... Battery is registers 3,9V. Any idea what I could try next?

@letsfixitgarage Год назад

Difficult to say.. where have you bought the replacement PCB? Maybe try to contact the seller for a replacement? There are not much to do applying voltage PCB should light up right away..

@Osi356a Год назад

@@letsfixitgarage I got it from a reseller on Aliexpress. Maybe it’s just a broken one then.

@ngo88 2 года назад

great video, thanks for the uploads. helping a lot with trying to fix my hx9360. i replaced battery and tested, worked and charged. Few hours later i came back the battery was fully drained and wont charge, any ideas where the issue could be? couldnt find your video for charger section if you created it

@letsfixitgarage 2 года назад

Try disconnecting and charging the battery manually. Then connect the battery to the toothbrush and check for a component that heats up on the board. It seams you have a short on the board of the battery gets drained that fast..

@sk-nh5wf 2 года назад

@@letsfixitgarage just tried and thats exactly what happened! The area near positive terminal between CR4 and CR5 was hot to touch. However I've looked all over and cant find where I've accidentally bridged/shorted it. Any idea how I can pinpoint the problem?

@letsfixitgarage 2 года назад

I don't think that you bridget it. It could mean that one of the chips has a short inside. So you will need a donor board to replace the defect component. And to pinpoint either go with finger from component to component or take a receipt paper (receipts are printed on thermo paper) and press and hold it on the board and when you lift it, it will have a "print" of the hot component.. or a flir thermovisor is of course the handiest in this diagnostic step ;)

@paft 2 года назад

I've skimmd though your vid (thanks.) I've got it open, and I'll try and diagnose tomorrow. I can clearly see corrosion behind the board and rust under the middle coil. If I do manage to repair it...what can be used to seal it back up and stop water getting in again?

@letsfixitgarage 2 года назад

Only original seal.. but first try to repair it and only then order the parts ;) water damage is usually tricky especially for first time repair..

@paft 2 года назад

@@letsfixitgarage Thanks for the reply. Liquid damage seems a very common problem? I originally bought my DimondClean in Oct 2016 and I've had it replaced twice under warranty. I'm in no rush but might take a look at it on the weekends when I can be bothered. Since I was lazy and I've already replaced it with an Oral B Pro 3.

@letsfixitgarage 2 года назад

I had one customer that brought his Diamondclean after 6 years because he dropped it and vibrations were weak, but upper seal was like new.. If you take care of the upper seal they are very reliable.. don't have a lot of experience with Braun, they seam to have better water protection but all in all I prefer Sonicare they are superior for me..

@haowupu2784 3 года назад

really good video, philips doesn't provide any repair for their toothbrush. i have send an email to you, hope you can read it. I followed some videos, but still didn't get it back to work.

@J800ama 2 месяца назад

hello there! can you do a video on the copper coil at the top please? the ends are both loose (the other ends a nicely soldered in the two pins)

@letsfixitgarage 2 месяца назад

Hi, there is not much to show on this part.. its a brusch head detection coil that receives and send information to the brush head. if it broke off and you need this functionality you need to either prolong the wires soldering extension wire or get a donor where you would take this part off..

@yianz9 Месяц назад

Thank you for the video! You have helped me repair a loose head and fix it successfully now 😊 Although, it seems to have brought up another problem, I’m putting my toothbrush on the charger and in the travel charger and the light won’t flash to say it’s charging. It still has power and works at the moment. After I finish brushing, the battery LED flashes. Doesn’t that signal that it has a partial charge? I don’t understand why it won’t flash when I put it on the charger. I’ve taken the plastic chrome piece on the bottom on and off in case bad contact, still the same. Any help would be greatly appreciated. Thank you

@yianz9 Месяц назад

Update: I've taken the unit out of the case and removed the bottom plastic silver coloured cap, it now charges. Any suggestion on how to reassemble the unit so it is making proper contact? I also can't seem to just place the unit on the cap without the casing to test it that way :/

@letsfixitgarage Месяц назад

Hi what is you toothbrush model? DiamondClean models have to be placed in the glass charger with end cap to properly charge.. additionally maybe the charging coil got damaged during extraction of the insides..

@yianz9 15 дней назад

@@letsfixitgarage Sorry for the late reply! It is the Diamond Clean HX9350. I received the new bottom cap and it still won't charge unless I remove the outer casing and place that directly onto the glass charging base. The same applies for using the travel charger. I have deduced that for some reason now, the internal components are not touching the charging cap, and therefore connection is not being made for the glass charging base. What do you think? Do you know a remedy for this problem? I really appreciate your help

@letsfixitgarage 10 дней назад

Difficult to say.. either charger, coil on toothbrush or charging circuit on the motherboard could influence it.. easiest way is to have second toothbrush and charger to see what is not working..

@mariabraach3153 3 года назад

Hello, thank you for the great video! Do you have an idea what it can be if the toothbrush no longer charges when it is in the housing? It charges without a housing, we replaced the battery and replaced the seal on the head. Everything went well but the test of loading before closing the handpiece was unsuccessful. Regards MB

@letsfixitgarage 3 года назад

A little bit more context would be good you replaced battery and the seal because it was damaged? Or what was the initial defect you started the repair..

@mariabraach3153 3 года назад

@@letsfixitgarage The on-switch was pressed in and was extremely difficult to switch, that was the main reason, as the battery always has to be recharged very quickly, we replaced it and replaced the seal as a precaution. The button could be cleaned under water and is now fine again. But when everything is in the case, it doesn't charge either in the glass or in the travel case, without the case it charges normally! Regards MB

@letsfixitgarage 3 года назад

@@mariabraach3153 did you found any signs of water inside? If any usually there is more under the Mainboard to see it you have to take it off the plastic frame. Sometimes when the toothpaste buildup is extreme it tears the button sealing and water can get inside through button not only sealing. From my experience draining battery is a sign of water damage usually battery holds long and strong with this toothbrush.. so either way to look further you need to take the motherboard off the frame and check for any corrosion signs or defect components.. it's not an easy task.. and sadly for now I don't have any advice on charging circuit diagnostics.. another option could be if the toothbrush functions get the wires from battery terminals and charge it with externall charger.. but it's not an elegant solution and water rightness will be compromised..

@mariabraach3153 3 года назад

@@letsfixitgarage There are no signs of water inside! Everything is clean, no signs of corrosion. It looks like the distance to the charging coil is too great when everything is in the housing. Could it be the battery itself? It's from Ebay with this description: Li-Ion battery, 800mAh, 3.7V suitable for the following models from Philips: EasyClean, FlexCare, HealthyWhite and DiamondClean. Thank you for answering us !!! Regards MB

@letsfixitgarage 3 года назад

@@mariabraach3153 it's difficult to say.. original battery is charging and holding the charge as I understood so I would look for a defect in coil or charging circuitry or charger itself.. but if it behaves the same in portable case and the glass then problem should be in the toothbrush.. I would look for a donor toothbrush and check voltages and resistances on various components between two of them.. as said defects in charging circuitry are quite rare so haven't worked on it till now..

@johannesschwarzer7933 3 месяца назад

Thank you for your video, but unfortunatly i couldn't fix my toothbrush! I opened my Diamondclean 9000 toothbrush because the upper button wasn't working/turning it on. I've already tested the button and it is working just fine + the toothbrush reacts to it being pressed with flashing leds. When put on the carger it even does the normal short vibrationg sound. Howerever it doesnt start vibrating normal when outside to brush teeth. Do you have any Idea what could be the problem? (there is no water damage)

@letsfixitgarage 3 месяца назад

sorry but don't really understand where is the problem.. at one point you write that button is not working but then when you test the button it works? try to describe the initial problem more precise..

@larneenglish Год назад

Do you have any suggestions for a toothbrush that's not charging? Not the charging case as it works on a different toothbrush. Not battery as I swapped it with a different toothbrush. The toothbrush works fine with a charged battery. Many thanks.

@letsfixitgarage Год назад

If you have second brush to test take multimeter and test in diode mode the two motherboard components in the bottom part of the motherboard. This part is responsible for charging. Rarely but I had cases where these chips would go bad. For replacement I just use donor boards haven't looked for new parts...

@unorthodoxsurplus 3 года назад

I have an issue where it won’t charge or turn on by the switch and when it’s on the charger, I does one long vibration followed by two short ones. Is that covered here?

@letsfixitgarage 3 года назад

Could be. First I would suggest to open it up and see if you find water damage traces.. if yes you can come back here and check out the suggestions..

@j.d.3269 3 года назад

Very informational! The MCU seems prone to damage. Any scenario that requires the MCU replacement?

@letsfixitgarage 3 года назад

Thought so too, but it's very rare.. and to be honest I got a little bit lazy in further diagnostics, with these repairs I usually cover 95% of defective ones and with the ones that are not fixed, it's easier to replace the whole motherboard and have the defective as donor, then check further..

@j.d.3269 3 года назад

@@letsfixitgarage Thank you for your insight. I like the Essence series because there's basically no chance for water damage, but there seems no place to buy its motherboard.

@letsfixitgarage 3 года назад

Havent had this type of brush in my hands so no real info on this.. but I generally prefer li-ion battery's Vs ni-mh and I believe these are not produced anymore? Then yes spare parts are a problem.. I usually buy mine as defect in eBay maybe there are some of essence too.. good luck ;)

@j.d.3269 3 года назад

@@letsfixitgarage You are correct that they are not produced anymore by Sonicare, but you can buy them new on ebay at 1/10 of the original price, even lower than used / defective. Li-ion battery is better than nimh, but I prefer no battery : )

@en2oh 2 месяца назад

I have the sonic care that won’t turn on. When I push the button it instantly vibrates for an instant than is silent. I’m wondering about mosfets as the problem. Are replacement SMD’s available for this PCB?

@letsfixitgarage 2 месяца назад

I would first double check all the control traces to the mosfets. if it has corrosion, repair it. if this doesn't help then you can try replacing mosfets. easiest way is to find a donor board as i have a lot of these haven't tried looking for separate components. from my experience these mosfets are quite reliable..

@gregowens2761 Год назад

Possible silly question from someone who knows little but how did you know which test points to use the multimeter on? Is there a generic approach to know what to do on any circuit or did you have to reverse engineer somehow?

@letsfixitgarage Год назад

thanks for the question! and no its not silly ;) Diagnostics always look easy on videos when someone presents a solution in few minutes. Behind it, there is hours of trail and error... what you do if you don't have a schematics? In this case when we have a simple PCB with visible traces you can follow them by simply observing them and ringing through in continuity mode, to see if traces are not damaged. In multilayer design usually you lose this possibility. Sometimes you need another working PCB to check good values of component or traces if they are not visible.. sometimes you exchange components to see if they are bad or some other component influences behavior of a good component.. as said diagnostics is really time consuming process to be the first and show the solution in 5 min to others.. of course with practice and experience you will get faster in knowing what to look for and where to look for, but still every devices is designed by different people and in electronics there is multiple solutions for the same problem :)

@gregostigo Год назад

@@letsfixitgarage That totally makes sense, thanks for taking the time for a considered reply. I come from a software background so there is some analogy with what you say. Suffice it to say that I think you've explained enough in your comment for me to stick with referencing and working from the hard work of others next time something is broken! For what it's worth, although it was involved, my toothbrush is completely fixed after bypassing dodgy contacts, and my soldering skills are a touch better now too!😁

@wolfgangweilbuchner6753 2 года назад

Do you have a tip as to what kind of error leads to the following state: The toothbrush vibrates twice briefly and once long in the charging station. And that in a loop ...

@letsfixitgarage 2 года назад

Not really.. what does the lights do when this happens?

@torresdelpaine8888 Год назад

I have a Sonicare Elite Pro 7800 electric toothbrush that is probably 15 years old. The power button on the circuit board beneath the handles green button has failed. Any idea what this part is called, or do you have reference to a replacement part number, or know where to buy? It’s basically a sweater switch with four connection pins located two on each side. There is a silicone nub on the top that has broken off due to age, but otherwise everything works.

@torresdelpaine8888 Год назад

You can see the two switches with the white nub, to the far left of this circuit board at time stamp: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qaswVoaM5TQ.html

@torresdelpaine8888 Год назад

On the circuit board, it says 4450-004. Not sure if this refers to a switch number or not …

@letsfixitgarage Год назад

sorry haven't had this kind of brush in my hands. but if its similar to the buttons on my video try to look for "micro switch" on electronic sites. maybe you get lucky. although I would upgrade for a newer brush as newer ones have better drive mechanics, higher vibration count and Li-ion battery that has much better output as older Ni-Mh.. and if you buy a defect one from eBay and repair it it will be extremely cheap purchase..

@SuperSamchong 3 года назад

Hi, I have a kids sonicare hx6330, when I place it on the charger it makes 1 long beep and 2 short beeps continuously. Would you have any idea where the problem lies? I have opened a few and managed to fix one with a trace problem because of your video. Thank you.

@letsfixitgarage 3 года назад

Hi sorry had only few of the kid sonicares and the defect were quite clear.. haven't heard of any diagnostic vibrations.. usually it vibrates when the battery is empty and it needs charging.. but continuous.. what about the battery voltage and what voltage you get when it's on charger? Maybe charging circuitry is failing..

@SuperSamchong 3 года назад

@@letsfixitgarage thank for your reply, i will look into it.

@robertoramirez6504 2 месяца назад

I have a broken axis shaft. “2.4 broken axis 10:55”. Where can I buy a new metal frame housing? I have a Philips Sonicare 9900 Prestige - HX999B. Thank you!

@letsfixitgarage 2 месяца назад

all sonicare brushes have the same drive mechanisms (metal frame housing) just look up any sonicare donor or if you need a new one aliexpress has some as well.

@sidgrover9428 2 года назад

great video, i've got a couple of sonicares to repair. from what you said i have deduced that the mainboard has a bad mosfet, i have found a motherboard supplier in china for a very good price £12. i also have a fuse gone, does anyone know the fuse rating?

@letsfixitgarage 2 года назад

I replace defect fuse with 2A value fuse. Till now seems to be ok.

@sidgrover9428 2 года назад

@@letsfixitgarage thanks for your reply, i have some on order

@jkrabacher1 Год назад

Took mine apart, cleaned it, now when I set it on the charger I get red and orange LEDs at the bottom. Seal is broken, so probably water damage. Battery registers 4.15v. I ordered a new one. Can I send you my old one so you can use it for parts?

@letsfixitgarage Год назад

Write me an email letsfixitgarage@gmail.com we can check what's possible.

@alexgalka9807 3 года назад

you saved me money, you should open Patreon,

@letsfixitgarage 3 года назад

Glad it was helpful! I had a short look in Patreon platform some time ago and got impression that is more for some frequent uploading creators - you have to provide some constant content for your patreons so I left this idea, as my intention with this channel was to help people whenever I get a chance, as this is more a hobby then my main work..

@mirotelservice4394 17 дней назад

Hi, I have a problem with my toothbrush. If I charge the battery externally, the brush works, but if I put it in the wireless charger, everything turns off and does not charge. Do you think there is a short circuit somewhere and it automatically disconnects when you put it in the charger?

@letsfixitgarage 10 дней назад

If you have a donor try changing chip with KLB on it.. that's the usual defect chip when the toothbrush doesn't charge..

@michaelgreene288 Месяц назад

What does it mean if it won't turn on, and putting it in the charger it makes one long beep with orange light, followed by two quick beeps with green light?

@letsfixitgarage 25 дней назад

First of all o would check the motherboard if it has water damage check all the connections and buttons functionality. Then I would try to check some chips but for that a donor board is needed.. sadly water damage is not easily solvable..

@andrii3810 2 года назад

11:26, exactly my issue :( anyways, thanks for the great video1

@letsfixitgarage 2 года назад

This one is annoying as you need spare part but it's easily accessible in eBay and the good part is that majority of Sonicare brushes even the cheapest ones have the same electromagnet drive ;)

@andrii3810 2 года назад

@@letsfixitgarage thanks for the reply! we have a deal at Costco right now, $150 CAD for two brushes + heads so I'll keep the one I have as a spare one :)

@karenchoan5094 3 года назад

Thank you so much for your videos. The metal around the screw at the top broke, which seems pretty common, and I would order a new part, but I cannot get the screw out. It's frozen to the washer, which is rotating in the metal casing. I've tried WD 40, and holding the washer with pressure, but the screw is still frozen. Any advice?

@letsfixitgarage 3 года назад

Try to insert a screwdriver or something to lock/hold the nut in place then it will not rotate and you can unscrew it easily.

@karenchoan5094 3 года назад

@@letsfixitgarage it's so kind of you to answer. Yes, I've tried to wedge a knife tip in there, to hold the nut in place - and when I do get it held - which is tricky! the screw is still not budging, even with WD40. I may liquid weld it all together and see how much life I can get out of it, if I just can't loosen that screw. Or I can try to liquid weld everything but the screw! And see if then I can loosen it! It's so lovely of you to have put all this smart stuff out - thank you!

@letsfixitgarage 3 года назад

That's strange.. usually the screw is easy to unscrew.. not sure what you want to use for liquid weld but it is a tricky place there are a lot of vibrations not sure it will hold... But sure play around and if it fails you can always replace the whole electromagnet unit..

@karenchoan5094 3 года назад

@@letsfixitgarage yes - I tried various things - I ended up supergluing the metal screw housing to the casing so I could have more purchase on the screw - in the end, a TV repairman with an open shop and a good tool got the screw out. I put the new head tip in and 1 month later, it's broken - cheap metal. I'm not giving up though. I love fixing things and hate throwing things out. Thanks so much for all your videos, they're helping me again with getting the whole thing open. Stay safe and well.

@letsfixitgarage 3 года назад

Yes I hate it see when working things are discarded for easy defects.. sadly there are no official spares for this toothbrush so it could be a cheap knock off part.. try to purchase on eBay a defect toothbrush with liquid damage they go out quite cheap and you will have yourself an original spare ;) and another toothbrush to check out more complex repairs ;) good luck with repairs and stay safe!

@lindatea1100 3 года назад

thank you for the detailed video! I found my toothbrush to have rust at the end of the electromagnet and some toothpaste around the magnet and electromagnet (where the gap should be). Is that a good indicator my toothbrush is a lost cause? The toothbrush still charges with no issues and the leds are fully functioning, but nothing happens when I press the power button

@letsfixitgarage 3 года назад

That's the water damage on pcb case, but it's repairable. I have 3 videos about how to fix it, but you will need special tools like microscope. In the last video I filmed how it is beeing performed just to see what needs to be done.. if that's a little bit to much you can send it to me and it will come back to life :)

@aligivehchy 3 года назад

Is it possible to get in touch with you for fixing my toothbrush?

@letsfixitgarage 3 года назад

Sure letsfixitgarage@gmail.com but I'm located in Europe.. just in case ;)

@Boooster123B 3 года назад

Hello, thank you for your great video series. I have a Sonicare HX9352/04 I had the problem, that my toothbrush was rapidly turning on and of for random. So I tried to repair it, by changing the SMD button. After desoldering the damaged button, I checked all lanes with continuity test. No problems found and no corrosion. I tried your trick by testing the brush by shorting ground and the R1 hole. Without success, no reaction at all! Between ground and R1 there is 0.5V current. The brush is still chargable and after I put it into the original loader, the battery has enough current. But I cannot turn it on again. When I load it, I recognized a light flickering at the other LEDs... Can you make a small diagnose on that behavior? :-D Thanks in advance!

@letsfixitgarage 3 года назад

Check the button line or the button itself again.. if I'm not mistaken button pulls the 0.5v that you see to ground.. if the line has continuity then it has to be the button try to shorten it's legs and see if that will help..

@Boooster123B 3 года назад

@@letsfixitgarage Hello unfortunately that helped not. After I short ground and the right pin at the button (or R1) the toothbrush is not doing anything. Although, it is loading... Maybe there is something wrong in the µC... The battery has 3.8V and there is no corrusion at all. I do not see where there can be a failure. All lines which must have continuity are correct, and it seems there is no faulty shortage. Thus... maybe the chip....

@letsfixitgarage 3 года назад

Difficult to suggest something remotely.. and yes there could be some defect chips or components I seen some strange rate behaviours but they are to rare to investigate any further.. my suggestion would be to buy another similar toothbrush as donor an exchange the board if it's good and if not try to repair one of two by exchanging components.. you already have some knowledge and these toothbrushes can be repaired even after water damage so check eBay and you will have some options..

@huamulancat 3 года назад

What is the tools name that looks like a gun? Is that a wrench?

@letsfixitgarage 3 года назад

At which minute? I have a lot of tools :)

@simonfong3570 3 года назад

Ive changed out my battery and charges fine without case on, but when the end cap is placed back over the windings, the brush doesnt charge anymore, any tips on how to fix this? Thank you!

@letsfixitgarage 3 года назад

Never had that kind of an issue.. try to inspect the coil maybe it was damaged somewhere and now it's shorting between the coils..

@simonfong3570 3 года назад

@@letsfixitgarage Hi I found out that the iron core at the bottom of the PCB is actually missing...this usually comes as part of the PCB replacement part right?

@letsfixitgarage 3 года назад

Nice find! It should be glued in, strange that it fell out.. Yes. If you can find the diamondclean pcb frame with coil it will be complete.

@bercarumarcel1578 3 года назад

Do you know if it is possible to buy only a new mainboard?

@letsfixitgarage 3 года назад

Haven't seen one for sale.. but I have some repaired ones if interested write me letsfixitgarage@gmail.com

@bercarumarcel1578 3 года назад

@@letsfixitgarage Thank you, I already did

@poklop84 3 года назад

Hey there. My Sonicare, when turned on, vibrates first shortly then one longer vibration. Green light is on and yellow is blinking. I managed to take it apart thanks to your tutorial. Water everywhere. Battery is showing 3 volts. My suspicion is that it is not charging. I have dried it out, but still no luck. Any tips where to start diagnosing?

@letsfixitgarage 3 года назад

Yes yellow led is for low charge. Water damage is always difficult to suggest.. best way is to have two boards and check continuity of the traces and IC's in diode mode or resistance mode.. and definitely check if charger is charging.. they go bad too.. hope this helps

@poklop84 3 года назад

@@letsfixitgarage I found the problem--the issue was one of the leads from the charging coil. It was interrupted (broken off) on the way to the PCB and it was not visible because it was covered with the residue (oxidation?) from the water. Soldered it back on and it's charging now. Thanks, you helped me confirm that it has something to do with charging.

@poklop84 3 года назад

Seems like the whole thing is not really well waterproofed. Shouldn't there be some glue around the gasket? I'm also wondering if I should store the brush horizontally--less chance of water seeping in from the head.

@letsfixitgarage 3 года назад

Nice find 👍haven't had that kind of damage.. and did you took off the pcb from the plastic holder? Usually there is much more damage/corrosion going on under the pcb but if it's working you can leave it as it is and if something comes up this would be a place to take a look first :)

@letsfixitgarage 3 года назад

Dis you inspect the upper rubber seal by removing the plastic cap? If you found water inside it will have a hole because of the build up other place where I found problems although not that often is the on/off button. This should be inspected to. If you keep the upper seal clean the seal is water tight and no problem whatsoever. Of course new design (flat rubber seal) could be an improvement but repaired few of these too.. so that's the only part that needs inspection and maintenance..

@jackng9797 2 года назад

Is the sound from a separate buzzer component or on the hx chip? I'm trying to identify the buzzer, as I like the subtle and pleasant sound from the Sonicare, which is the opposite to the annoying alarm sound from other devices. Can anyone help finding this sound component on the Sonicare?

@letsfixitgarage 2 года назад

There is no buzzer. Sound comes from electromagnetic drive. 30s notifications are being made with different frequence of magnetic drive as well

@jackng9797 2 года назад

@@letsfixitgarage So the electromagnetic drive is just on the main chip?

@letsfixitgarage 2 года назад

Drive is the magnet with electromagnet coil, it is driven by the double MOSFETs, and controll of the MOSFETs is programmed in the main chip..

@clevercorvax7466 3 года назад

Hello, Nice video. Though, I don't think it directly covers the common fault when the working and fully charged toothbrush just stops vibrating. That mostly happens on the excessive shaft load (when you press the brush too hard against your teeth). But in my case, it is very prominent, and happens in some extra strong vibrating modes (like cleaning mode) even when the toothbrush is not in the mouth. I understand that it is most likely triggering of some sort of overload protection. Can you address that fault please? What is most likely cause of it? How to get rid of this? Once again - there is no obvious mechanical or electrical damages, the battery is fully charged, and yet the toothbrush stops by itself. After it stops, I can start it again with the button, and it stops again, after some while, different every time. The gap between electromagnet and permanent magnets was adjusted to 1mm. Oh! One more thing: when I gently grab and hold (but not too tightly) the vibrating magnets (the part closest to the electromagnet), then this fault happens much more rarely. So restricting the vibration seems to improve the behavior (in my case at least). Any suggestions? Thanks.

@letsfixitgarage 3 года назад

I wouldn't call your defect as common one.. didn't had a chance to see something like that.. so I can only suggest what I would do.. as the defect is not permanent only exchanging of components would be a useful way of identifying the problematic part.. lets say I would exchange the whole electromagnetic part just to eliminate any mechanical fault in this part.. but for me as usuall the more possible cause seems as it is water damaged.. is the seal in good condition? have you opened and inspected the inside? As said before main water damage is usually on the back side of the PCB..

@clevercorvax7466 3 года назад

@@letsfixitgarage Thanks for your quick reply. Yes, I have opened and inspected the PCBA - I am experienced with board debugging and repairs. I have even taken off the PCBA and gave it a good clean with isoprop, after the good visual inspection and multimeter check. Nothing obvious from the electrical point of view. Unfortunately, I don't have another toothbrush, in order to exchange the blocks, so will have to do a lot of guesswork here. Before we go on, I should clarify that the toothbrush I have is a Philips Sonicare, but NOT the model you are using in all your videos (HX9340 with the square butt and five white LEDs). Mine is an earlier model, HX6710, with the oval butt, green LEDs and only two modes of operation - "Clean" and "Clean & White") What makes me think that it is probably a mechanical fault is that the occurrence of the fault reduces if I hold the shaft with my hand, therefore changing the mechanical load on the shaft (and therefore changing the electrical back-emf feedback in the electromagnets). I may be completely wrong here, of course. The top rubber seal is in a reasonable condition, but I don't think it's relevant as I have opened the brush, and gave all parts (mech and elec) a very good cleaning, plus I disassembled and then re-assembled all mech/elec blocks. I now operate it in a good room environment, with no moisture etc... So, it is something not that obvious. I haven't looked at the signals with the CRO yet, but this is in my plans. My problem is I don't know how the electrical protection cut-off works in this brush - it may be an overcurrent (but I can't see any current sensing resistors there) or analyzing the shape of the back-emf pulses (and then they should sample the driving signals with the ADCs in the main PIC controller, which imho, would be an overkill). Anyway, all suggestions and ideas are welcome. Thanks again.

@letsfixitgarage 3 года назад

Well I can't comment on the working principles either.. didn't dive in that deep, as that kind of damage is quite rare.. I would suggest to get a broken toothbrush of the same model as you have and then try some swapping or repair the other one as this one will take a lot of your time :) I had few cases where I was testing pcb with multimeter and it looked fine, but when under load it was shutting down.. if I remember correctly I redid PCB tracks like I showed in these videos after water damage and then it worked.

@clevercorvax7466 3 года назад

@@letsfixitgarage Spent more time on that subj last night. The culprit turned out to be a battery itself. I traced the circuit a bit, and as far as I can tell now, there are no feedbacks from the coil driving signals to the micro. So, I guess, the protection against the shaft overload has to be done by simply sensing the battery voltage drop. Well... there is a fuse F1 as a last resort. Anyway, when I replaced the battery with the externally wired 18650 (I don't have 14500 around), the problem went away. Oh, btw, do you know if there is a schematics for those brushes available from anywhere? Original or reverse-engineered... Tnx.

@letsfixitgarage 3 года назад

Interesting.. how old is the toothbrush? As I haven't saw that kind of behaviour.. very interesting. usually battery for me seamed unkilable.. there were batteries that were discharged till 1-2v and worked fine after charge from power supply.. so this is a very interesting diagnosis for me, do you have some tester to see the battery capacity? As for schematics haven't found any, there were some quite old but good webpages where they reverse engineered the working principle of the Sonicare toothbrush but none dived deep in to schematics or so..

@PaliVCiernom 3 года назад

I opened mine, the magnet was stuck, so I separated it, it worked for a second, but then as I put it back together, it died. Absolutely no sound or light. The battery is good, the switch seems good, there seems to be no damage from water. I can send it to you if you want to make interesting investigation video. For me it is a write-off :(

@letsfixitgarage 3 года назад

Hi, it's difficult to suggest something but did you checked the fuse, button and all the track points with a multimeter? Write me an email maybe we can work something out..

@maini51 3 года назад

I have the exact same problem.

@matyouzbachi9008 3 года назад

My brush lights flashing all together when i place the toothbrush on charger and no charging

@letsfixitgarage 3 года назад

Could be water inside, shorting something out, or something died on the charging circuit.. but I would go with the first one..

@billyparham630 2 года назад

i turn my sonicare on and it can go on for minutes. once i put it on my teeth or apply any resistance to the brush, it turns off and makes a single long beep. any ideas?

@letsfixitgarage 2 года назад

Well to comment I would need at least a model and some background.. water damage or how did this defect started...

@billyparham630 2 года назад

@@letsfixitgarage I understand, it is HX6530 with no water damage I know of. It seems I found the reason. Couple weeks ago I was disassembling the device because of loose screw on the head. I accidentaly cut the coil with my screw driver while trying to undo bottom part. The coil is soldered straight to the battery section. My guess is it's simply low on battery and can't recharge because of the damaged coil. Tried to tie the separated ends of the coil together but it had no effect on charging. Can you think of any way to fix this mess?

@letsfixitgarage 2 года назад

That's a good example how difficult it is to comment and help in comments when you don't know the background.. it is very difficult to know what was already done with the unit.. thanks for explanation. In this case you could try to solder the brake and not simply bind it and check continuity if the coil doesn't have any further breaks.. but because the windings change and you don't know if more of the coil was damaged (shorting) it is better to change the coil with frame completely. If you want to have it as cheap as possible you could ad an connector directly to the battery and charge it with 1s li-ion charger bypassing toothbrush induction charger.. although this will void toothbrush water resistance for sure..

@billyparham630 2 года назад

@@letsfixitgarage I see. Thank you for the tips. I will try to solder it back together and if it doesn't work I'll get a new one. Definitely learned from my own mistakes here. Have a good day, sir!

@TobiasPatzelt Год назад

ha.. jetzt erst das zweite Video gesehen... :)

@letsfixitgarage Год назад

Gibts viel mehr :)

@BirdFromYakiVegas 3 года назад

Warning ⚠️...if you purchase any sonicare Phillips get WARRANTY Im on my 3rd one, the stem keeps breaking... I thought maybe the kids dropd it the 1st time, but the stem broke on me in the middle of brushing 2X along w the power.... Now I got to apologize to my kids since I've been blaming them for dropping my toothbrush and breaking it and it's been a default this whole time.... SMH

@letsfixitgarage 3 года назад

Difficult to say what was the cause but yes water damage through upper seal and broken head or loose screw are the most common defects on these toothbrushes..

@maini51 3 года назад

My brush is totally dead, battery voltage is 3.7, no vibration and no led lights in charger, fuse is ok.

@letsfixitgarage 3 года назад

At this point my only suggestion would be to take the board off, inspect and clean both sides. Check tracks to MOSFETs and the button.. that's the main things that usually is damaged by water in Diamondclean brushes..