Аккумулятор для braun oral b 3756

Как заменить аккумулятор Oral-B Professional Care Type 3756 и 3754

Инструменты

• Паяльник (до 25 Вт)
• Припой (бессвинцовый)
• Медная плетёнка для сбора припоя
• Отвёртка плоская 2-4 мм
• Канцелярский нож
• Клещи для резки металла
• Изолента
• Плоскогубцы
• Комплектная зарядная станция
• «Суперклей» (на случай повреждения фиксаторов)

Запчасти

Пошаговая инструкция, которая поможет вам заменить аккумулятор в электронной зубной щётке Oral-B от компании Braun серий Professional Care Type 3754/3756. Отремонтируйте, следуя указаниям, если упала мощность, устройство перестало держать заряд, быстро разряжается, внезапно выключается или вовсе не включается.

Описание выполнено на примере модели Type 3756, но полностью подходит и к устройствам Type 3754. Они включают следующие названия зубных щёток Oral-B:

• — Professional Care,
• — Professional Care PRO,
• — TriZone 600,
• — TriZone 1000,
• — TriZone 2000,
• — TriZone 3000 и другие.

Чтобы узнать, подойдёт ли инструкция к вашей электрической зубной щётке, проверьте номер модели на донной части рукоятки. Имейте ввиду, что для других зубных щёток описание процедуры замены аккумулятора не подойдёт. Посмотрите раздел инструкций по остальным моделям — мы постоянно его пополняем.

Шаг 1. Предисловие

• • Приготовьтесь разобрать Braun Oral-B Professional Care Type 3756 и 3754 и выключите устройство.
• • Предстоит снять корпус, отпаять контакты от печатной платы, извлечь внутренние компоненты.
• • Важно! Необходимо умение пайки — всего предстоит отпаять и затем припаять заново 9 контактов (см.изображение).
• • Описание и фотографии на примере зубной щётки Oral-B Type 3756 — все действия идентичны с Type 3754.
• • Внимание! Внутри никель-металлогидридный (NiMH) аккумулятор — не нагревайте его, не замыкайте контактные выводы, избегайте работы острыми предметами вблизи него и не роняйте!
• • Насадку и аксессуары с корпуса следует снять.

Шаг 2

• • До начала разборки погрузите щётку в горячую воду (+60°C) до уровня чуть выше пластикового кольца вокруг вала.
• • Подержите щётку в горячей воде около 5 минут, чтобы ослабить фиксацию вала пластиковым кольцом.
• • Подцепите и снимите фиксатор вала — лучше всего это сделать шарнирно-губцевым инструментом (например, плоскогубцами).
• • Внимание! Кольцо легко повредить при снятии из-за конусовидного профиля — поддевайте его за нижний край.
• • Рекомендуем намотать изоленту на губки инструмента, чтобы не оставить следов на глянцевом пластике при снятии.
• • Снимите кольцо полностью.

Шаг 3

• • Поместите нижнюю часть корпуса электронной зубной щётки в горячую воду (+60°C) для размягчения пластика заглушки в основании рукоятки.
• • Установите рукоятку в док-станцию зарядного устройства, которое должно быть отключено от электророзетки.
• • Используя фиксацию док-станции наклоните рукоятку щётки назад, чтобы открыть крышку в основании корпуса.
• • Внимание! Недостаточно размягчённый пластиковый фиксатор заглушки может сломаться! Если это произошло, то используйте при сборке немного клея для повторной фиксации.
• • Проследите за усилием при наклоне — оно не должно быть чрезмерным, чтобы избежать поломки.
• • Извлеките и снимите донную крышку полностью.

Шаг 4

• • Внутри корпуса щётки размещена пружина — осторожно извлеките её (обычно она просто выпадает сама).
• • Внимание! Не повредите медную проводку на катушке!
• • Аккуратно надавите на металлический вал зубной щётки и одновременно потяните за внутренние компоненты, чтобы извлечь их из корпуса.
• • Полностью снимите корпус щётки для доступа ко всем внутренним частям.

Шаг 5

• • Снимите с внутреннего блока пластину выключателя питания.
• • Пластина фиксируется за металлические боковины с обеих сторон.

Шаг 6

• • Используйте паяльник для отсоединения клемм аккумулятора со стороны печатной платы.
• • Удалите с отрицательной клеммы припой с помощью паяльника и медной проволоки (или специального инструмента снятия излишков припоя).
• • Тоже самое выполните для положительной клеммы.
• • Ножом аккуратно отогните ножки контактов аккумулятора вертикально (перпендикулярно печатной плате).
• • Отпаяйте контакт реле (сигнал сильного нажатия) и сдвиньте его вместе с площадкой переключателя вверх.
• • Снимите переключатель с отпаянным контактом реле.

Шаг 7

• • Отпаяйте два контакта моторчика, которые находятся по бокам от контакта реле.
• • Отогните клеммы вертикально.

Шаг 8

• • Отпаяйте от печатной платы контакты зарядной катушки.
• • Отпаяйте контакты сигнальной лампы чрезмерного нажатия.
• • Внимание! Будьте предельно осторожны при работе с контактами вблизи пластика (можно его расплавить) и особенно осторожны с тонкими медными проводами!
• • Аккуратно снимите тонкие проводки с печатной платы, добавляя паяльником тепла при схватывании на контактах и при этом оберегая пластик рядом.

Шаг 9

• • Отвёрткой с плоским шлицем зажмите белые фиксаторы с обеих сторон чёрного корпуса катушки.
• • Отсоедините корпус катушки, извлеките и уберите в сторону.

Шаг 10

• • Отсоедините держатель проводов сигнальной лампы нажатия.
• • Осторожным движением подцепите держатель и стяните его с верхнего вала (показано стрелкой на изображении).
• • Полностью снимите держатель и отложите в сторону.

Шаг 11

• • Извлеките печатную плату.
• • Внимание! Остерегайтесь повреждений от статического электричества, когда берёте в руки печатную плату!
• • Подцепите и снимите аккумулятор.

Шаг 12

• • Если в вашей электронной зубной щётке аккумулятор длиной 42 мм, то перед установкой нового выполните шаги 13 и 14.
• • Если в щётке установлен увеличенный аккумулятор длиной 48-49 мм, то завершите замену и приступайте к сборке.

Шаг 13

• • Подцепите пластиковые язычки держателя аккумулятора.
• • Снимите держатель с металлической основы.

Шаг 14

• • Канцелярским ножом осторожно срежьте четыре шлицевых внутренних стенки, которые препятствуют установке более длинного аккумулятора.
• • Внимание! Контролируйте усилие ножа и не сломайте зажим на грани держателя, который фиксирует печатную плату (при установке).
• • Также ножом срежьте центральный стержень под квадратным отверстием.
• • После удаления лишнего пластика установите новый аккумулятор.
• • В обратной последовательности действий верните держатель аккумулятора в металлический держатель и зафиксируйте его боковыми защёлками.

Заключение

Замените батарею Braun Oral-B Professional Care Type 3756 (или Type 3754, в зависимости от изделия), установив новую в держатель. Обрежьте кусачками контакты аккумулятора, если они не умещаются в прорези внутри печатной платы.

Соберите устройство в обратном порядке инструкции с пайкой всех 9 ранее отсоединённых контактов. Новый элемент питания будет держать заряд дольше, а мощность электронной зубной щётки заметно возрастёт

После замены перед первым использованием зарядите щётку в течение суток (24 часов). Если индикация будет работать неверно, то включите щётку на холостом ходу и разрядите до полного отключения, а затем без промедления зарядите также в течение 24 часов. Далее пользуйтесь в штатном режиме.

Внимание! Утилизируйте аккумулятор согласно правилам вашего региона.

Источник

Braun Oral-B Professional Care Type 3754/3756 Battery Replacement

This guide will take you step by step through how to dismantle the Braun Oral-B Professional Care Type 3756 electric toothbrush and replace the battery. The tutorial is based on the Type 3756 toothbrush but also applies to Type 3754 toothbrushes. These include the Professional Care, PRO and TriZone 600, 1000, 2000 and 3000 model names, and others. The type number of your toothbrush is marked on the bottom of the handle.

For other toothbrush models and type numbers the battery replacement procedure is slightly different so please see our other guides to toothbrush battery replacement instead.

The basic method is:

• Dismantle handle
• Desolder old battery and other connections from PCB
• Remove charging coil, pressure warning light, pressure switch, PCB and battery
• Replace battery
• Reassemble PCB and other parts
• Solder in connections for parts and new battery
• Reassemble handle

This is documented in detail below along with lots of pictures. Click on any picture to enlarge it.

Video

We have also created a video from this guide to Braun Oral-B Professional Care Type 3754/3756 battery replacement here, which you can watch below.

Disclaimer

This guide is for educational purposes only and is offered without guarantee or liability. For professional use only. Any act carried out by yourself is entirely at your own risk. Any damage to yourself, your toothbrush or anything else is entirely your responsibility.

Tools / Parts / Equipment

• Braun Oral-B Professional Care toothbrush (Type 3754 or 3756)
• Original charger
• Soldering iron: Electronics grade (about 18-25 watt)
• Solder: Lead-free silver solder is great for this
• Solder sucker (also known as a desoldering pump) and/or desoldering braid/wick
• Scissors
• Craft knife e.g. scalpel, snap-off, retractable or Stanley type
• Small flat-bladed screwdriver: 2 to 4mm wide
• 10-11mm ring spanner or tool with similar sized hole
• Instant glue (e.g. superglue or other cyanoacrylate adhesive)
• Replacement battery. Either:
  • Original size 42mm by 14mm 1.2V NiMH with tags (Support us by buying from ToothbrushBattery.com here)
  • Or upgrade to 49mm by 14mm 1.2V NiMH by modifying your brush as shown. (Support us by buying from ToothbrushBattery.com here)

How-To

To start off, remove any brush heads from the top of the handle. Stand the toothbrush tip-first in hot water (60 degrees C) for 5 minutes to soften the plastic and make the ring easier to remove. Use the screwdriver to pry off the plastic ring from around the shaft. Note that the ring is stepped so you might need to press down into the soft coloured surrounding material to lever the ring from underneath. Alternatively you can use pliers with tape inside the jaws to stop them marking the ring.

Put the brush on its charger.

Holding the charger and the toothbrush gently bend the handle backwards so that the base starts to lever open. Standing this end of the brush in hot water for 5 minutes before bending it back will help to soften the plastic and will make the clip release more easily and be less likely to break.

Remove the handle from the charger and the base of the handle should come off. The spring might fall out so don’t lose it!

At this point you might realise that you have fallen victim to Braun’s designed-in obsolescence and non-repairability if the plastic tab at the front of the base breaks off. This makes it more difficult for the toothbrush to be repaired (see below.)

Don’t worry if this breaks off as we can use glue at reassembly time.

If it hasn’t already fallen out remove the spring from inside the coil in base of the handle and put it somewhere safe.

Remove the inner workings of the toothbrush by pushing the shaft in from the top.

The first piece to remove from the internal assembly is the power switch plate. This is clipped in on both sides at the top of the brush, see the arrows below. Carefully unclip it from one side, then the other:

Time to get your soldering iron warmed up now! Starting with the negative one, use the soldering iron and desolder pump to carefully desolder the two battery terminals on the circuit board (arrowed below) and bend the metal tabs vertical and away from the board with a knife so there is no solder left joining the solder tag to the board. Desoldering braid might also be useful for this.

If fitted, locate the solder point for the pressure warning switch (arrowed below) and desolder it. Then unclip the switch and put it to one side.

Locate the two solder points for the motor (arrowed below) and desolder them, bending the tags upright with a knife so they are disconnected from the circuit board.

Then it’s on to the copper wire solder points for the charging coil (arrowed below, right) and the pressure warning light (arrowed below, left). Carefully desolder these and lift the wires away from the circuit board trying not to melt the plastic around them.

Using the screwdriver carefully press in on the white clips on both sides (one arrowed below) which hold the black coil support in place and unclip the coil, putting it to one side.

Unclip the carrier for the pressure warning light wires and gently remove the carrier from the top shaft (arrowed below) then put it to one side.

You should now be able to unclip the circuit board at the motor end of the board and slide it out.

Finally, remove the battery from the toothbrush.

Measure your battery and if it is 42mm long you might have the option of fitting a longer battery instead. Because it is physically larger, a longer battery will have a higher electrical capacity (mAh) and will run for longer between recharges. Do you notice how the metal tag on the positive terminal extends horizontally away from the battery? Take a look at the picture below to see how the tag extends through some empty space inside the handle.

When the battery is temporarily replaced with a spare or even just turned around and inserted back to front you can see how the battery comes up against plastic spacing stoppers (arrowed below) which prevent it from sliding up any closer to the motor.

You now have the option to either replace the old battery with one of the same physical dimensions or modify the plastic housing to accept a longer, higher capacity 49mm battery. Please support us with writing these repair guides by buying your replacement battery through the links to our secure online shop shown. The original-sized 42mm x 14mm batteries are 1200mAh capacity and the longer 49mm x 14mm batteries are 2200mAh, over 80% higher capacity! Higher capacity means your toothbrush will run for longer before it needs recharging. See the picture below for (left to right) replacement 42mm battery, original 42mm battery and replacement 49mm battery.

Choose which option you’d like by clicking on the required link below:

Replace with original size battery

Modify and replace with longer battery

185 thoughts on “ Braun Oral-B Professional Care Type 3754/3756 Battery Replacement ”

Excellent, clear and concise instructions. As a reasonably competent diy-er I had no problems following the step-by-step guide to replace the battery in a Braun Professional 1000 toothbrush. One minor word of warning – If modifying the battery carrier to take a larger (49mm) battery be very careful not to break the clip mounted on the end of the carrier that holds the circuit board onto the carrier when fitted. As considerable force is required to cut out the battery carrier to take the larger battery this is easily done – be warned!

Excellent instructions, just replaced 2 toothbrush batteries.
One tip, it’s not necessary to desolder the coil, as it comes away with the board in my toothbrush.

At first I saw this as a challenge but actually the instructions make the job of replacing the battery quite easy. I would strongly recommend using a desoldering pump as stated in the instructions. I didn’t and found it much more difficult to desolder the fine copper wires without melting the plastic battery compartment as there is a lot of solder around the joints. I have since bought one for a couple of pounds. The ability to modify the toothbrush to take a higher capacity battery is brilliant too and quite easy. I used a No 10A scalpel blade to remove the plastic spacing ribs. Replacement battery delivered very quickly and is not to expensive.

Another brush successfully revived! Thanks for the tips about the desoldering pump and scalpel blade Ian.

Was so fortunate to find this tutorial and incredibly well-done instructions. I’m too stubborn and cheap to purchase new toothbrushes, so I replaced batteries with the larger 49mm NiMH on Oral B 3000/3756 series brushes and they work like new now! Thanks for saving me tons of money!

Just replaced battery supplied by you using your very clear instruction guide. I modified the battery carrier following your instructions to take the longer battery and reassembled with no problems and no glue required. My tip to others would be to use desoldering braid instead of a desolder pump if you can as it’s much easier and kinder to the circuit board. Thanks very much Ionic.

Thanks for the feedback Keith and for the tip about using desolder braid. Another toothbrush is kept running!

Fantastic. I have thrown away two brushes in the past, but no more! I invested in a small soldering iron and there was no holding me back; one toothbrush now up and running again. If I can do it anyone can. Thank you!
Jane

Thanks Jane, I’m glad you got your brush up and running again. Another one saved from the landfill!
Rob

Not a lot to add to all that has been said before. It looks a daunting task but actually it is quite easy. However! I can add a few pointers to the very easy-to-follow instructions.

1. Don’t do as I did and put the battery in the wrong way round! How I managed it I have no idea because the photos clearly show the orientation. The result is, the motor runs permanently and will not turn off and one of the chips gets hot very quickly. Diagnosed easily by Rob and the brush now works a treat.
2. Do use a very small soldering iron tip. Mine is 1mm. You must use a solder sucker or solder wick.
3. Put the bottom end into near-boiling water before you remove the base and it will come apart easily and the securing lug will not snap off.

Thanks for the tips John, glad you got it working. Another toothbrush saved from the landfill!

You don’t actually need to put the bottom in hot water. If you feel carefully, about 5-6mm up from the seam, below the plug indicator, you can feel the hole the securing lug snaps into. Push there with a small screwdriver or the like while pulling back in the charger. That’s how it’s designed to come apart!

All went well but this procedure is not for the faint hearted! I last did soldering of printed circuit boards when I was 18 (now 70!). Took about one and a half hours but I can see that second time around about 30 minutes should be plenty. Very clear instructions….thank you.

Glad to hear you got your toothbrush up and running again Trevor! Thanks for the feedback.

Hardest part was getting the bottom off… after that the instructions were clear and easy to follow. I agree with the other comments – a solder pump was much easier to use than desolder wick. Thanks!

Good work on getting it apart Andrew 🙂 Glad the instructions were helpful!

Many thanks for your excellent guide for the battery replacement for the Braun Oral-B Pro type 3756. I have just replaced the battery with the larger version and no problems following your guide at all. Detailed images helped so well, and I got to use my solder pump for the first time!
All charged up over night and working fine today, thank you. Now, if only you did a battery replacement for the Philips Sonicare flosser………it’s already taken apart, just need a battery. Kim

Hi Kim, great to hear about your successful repair! You mention that you’re looking for a battery for your Sonicare flosser. We have details of batteries for the Sonicare Airfloss here.

Thanks so much for the excellent, detailed guide. I am not an electronics geek, but was able to follow the guide without too much trouble. I was grateful for John’s post as I also got the battery in the wrong way the first time. Thanks to John I was able to diagnose and correct the problem although this took some time. I had to solder an extra piece of tab to the positive terminal of the battery since it was cut too short. In the end it got a little messy since I had repaired the solder joints twice and added extra battery solder, but the toothbrush works as good as new! Ionic is providing a valuable service to consumers and the environment –THANKS!

Great to hear you got your toothbrush repaired and working again Rick!

I have successfully replaced the battery in my Professional Care 3756 with the optional longer battery and like other respondents would like to mention the the very helpful Ionic Industries detailed guide. I would however suggest the better way to trim the new battery terminals would be to cut down the width from the end before cutting across, as indicated in the guide. I followed the instructions and cut across first, this required enough scissor pressure to start the cut which then cut right across. Luckily there was still enough remaining length of terminal to try again and this time I easily cut from the end along the centre. It was then easy to fold back the half width and cut it off without danger of cutting right across. I’m happy to say my toothbrush is now back to full function.

Thanks for the tip Barry! You’re right to point out the risk of cutting right through the battery tag when cutting in from the side. You can use the very tip of the scissors to snip in part of the way but this relies on the scissor blades being sharp enough and tight enough! Great to hear about another successful repair 🙂

I followed your detailed and accurate instructions and replaced the battery in my 3756 toothbrush with the higher capacity one. All went well and the red light flashed on when soldering the final battery connection in place. However, I have been unable to get the toothbrush to go into charging mode. I have checked all the usual things: coil connections and continuity (1.4 Ohms), motor connections (I checked it ran from a battery across its terminals when disassembled), no solder splashes. All I get is the flashing red light when the power switch is pressed. I have tried disconnecting the new battery and wiring in the old battery, but no joy. I partially discharged the new battery externally to see if that would help – again, no joy. Any ideas?

Hi David, good work with the install and checks – strange that it’s not working 🙁 Have you tried leaving the brush on the charger for an hour? Sometimes it takes up to an hour before the toothbrush even acknowledges that it’s charging! It could also be that the charger is faulty but that’s a pretty rare occurrence.

Hi, I have the same problem – after replacement it works but flashes red and is not charging. The charger works with another brush. So…is there some kinde of “replacement protection” in the chip? Thx for ANY helpful ideas (i also checked all internal components)…
Klaus.

Are you able to measure the voltage of the battery? You can also try leaving it running until it shuts off then give it a full 24 hour charge.

I charged the accu before inserting it, it had 1.35v…but never charged in the brush, only red blinking. It the pcb version with sop-20 housing chip so it differs from yours…maybe older but its an 3756 model. Ill test it! Thx…

I did leave the toothbrush on the charger for 24 hours but no joy. Maybe during disassembly I could have shorted something on the PCB although I’m not aware of doing so. Is there a way of resetting the ‘intelligent’ battery meter? I would have thought that it is waiting for a charge since the red light is flashing. I’ll do a bit more experimenting to see why the charging circuit is apparently not working (the time pressure is off since my wife insisted on having a replacement toothbrush!! One question: there are what appears to be 2 small ferrite pieces in the main moulding towards the charging end of the toothbrush – any idea of their purpose as they don’t appear to be part of the charging magnetic circuit?

I believe the two beads are a catalyst to absorb any gases (i.e. hydrogen) given off by the battery in the rare situation that it over charges. You’re right that they’re not part of the induction charging circuit.
Regarding your own toothbrush, the battery meter in the current 3756 isn’t sophisticated enough to adapt itself so it won’t need resetting. I’d suggest re-fitting the old battery and checking for shorts on the PCB – a common one is the pressure sensor switch (if fitted) connection touching the positive battery connection. However, it’s more likely with yours that one of the charging coil wires has come off. Also check that no surface-mount components have moved on the PCB near to where you’ve been soldering.

I recently replaced a battery due to the pressure sensing light of the oral-b pro 1000 kept flashing (and the toothbrush would lose power after a short time after attempted recharging – prior to battery replacement). After the replacement, the pressure-sensing light continued to flash, and the new battery wouldn’t charge up much. It was obviously charging a bit, but not fully. Interestingly – when the new battery then became low (as expected), I then kept the toothbrush by itself, without charger until the pressure-sensing light eventually fully drained the battery (and hence no more flashing pressure sensing light after some number of hours or so) – and I notice that a recharge of my toothbrush from a totally drained battery state will charge the battery up to full capacity again. However – using the toothbrush leads to the flashing pressure sensing light situation again – so that the toothbrush will keep running (for a relatively long time – such as using it for a week or so) until the battery gets drained again. In this case – I’m suspecting a component on the circuit board has failed —– or the circuit board is behaving in an out-of-spec way. I’m thinking that – in this case, my original battery was probably ok, and the circuitboard isn’t 100% well.

Check the area around where the pressure sensor switch plate is soldered to the PCB. A stray blob of solder can cause a short circuit. Check the positive metal battery tag nearby too as they are very close.

Thanks for those recommendations! I have checked. Everything looks ok. I think the board developed a fault to start with. The original symptom was flashing red light (pressure sensor light flashing – eg. light off for a few seconds, red light for half second or so, then off for few seconds – repeatedly). But – interestingly, once the toothbush is turned on, the unit would behave normally – no flashing pressure sensor light when normally operating the motor. And the pressure sensor light works when we apply too much pressure. The issue was – during charging, the pressure sensor light would flash (as mentioned), and the green charge light would flash normally – indicating charging. However, the charging would not allow for a full charge. The charging indicator would keep flashing as ‘normal’, so it appears as if it’s charging normally. But after a week, the battery would become drained, to the point where the motor would no longer operate/move. But still enough power to keep the pressure sensing light flashing. After battery replacement – same issue. But what I have noticed is – if I completely drain the battery so that even the pressure sensor light has no more power to flash, then I am able to put the toothbrush on the charger. If I then leave the toothbrush on the charger under this condition, then the pressure sensor light won’t flash during the charging process, and the battery is also (interestingly) able to reach fully charge. At the end of the charging, the green charging light will then cease to flash (which is normal). But the red pressure sensing light eventually begins to flash again! But….the difference now is – the battery reaches a full charge. Absolutely fully charged. This will allow the toothbrush to be used for a week or so – until charge runs out again. In which case, I would need to allow the battery to fully drain away (ie. until even the red pressure sensor light has no power to flash anymore). That’s when I would have to allow uninterrupted charging. I found that it needs to be uninterrupted charging, because pulling the toothbrush from the charger pre-maturely (during the charging) would result in the same flashing flashing pressure sensor light situation again – where the charger won’t put much charge into the battery. And – just to be complete – attempts to re-charge when the motor has no more energy to move (but pressure sensing light still flashing) will allow the battery to become charged a little. Eg. 5 to 10 hours of charging under this condition would allow the motor to turn again for maybe 1 minute of usage only, before running out of juice. I think it’s a circuit board issue – something on the board has gone out of specs. Thanks again!

I have now repaired ‘my’ toothbrush (since my wife got a new one!) and was very careful when disconnecting the battery. Before this I checked the battery voltage on the tooth brush at full charge (1.386V) and when empty (red light, 1.232V). I checked the replacement battery was between these limits (it was 1.271V) before fitting. Everything went according to plan and I am now getting the full use of the higher capacity battery.

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