![]() Then unclip the switch and put it to one side. If fitted, locate the solder point for the pressure warning switch (arrowed below) and desolder it. Desoldering braid might also be useful for this. Time to get your soldering iron warmed up now! Starting with the negative one (nearest the coil of copper wire), use the soldering iron and desolder pump to carefully desolder the two battery terminals on the circuit board (arrowed below, positive on the left and negative on the right) 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. Carefully unclip it from one side, then the other: This is clipped in on both sides at the top of the brush, see the arrows below. The first piece to remove from the internal assembly is the power switch plate. Remove the inner workings of the toothbrush by pushing the shaft in from the top. If it hasn’t already fallen out remove the spring from inside the coil in base of the handle and put it somewhere safe. This makes it more difficult for the toothbrush to be repaired (see below.)ĭon’t worry if this breaks off as we can use glue at reassembly time. The spring might fall out so don’t lose it!Īt 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. Remove the handle from the charger and the base of the handle should come off. 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. Holding the charger and the toothbrush gently bend the handle backwards so that the base starts to lever open. Alternatively you can use pliers with tape inside the jaws to stop them marking the ring. 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. Use the screwdriver to pry off the plastic ring from around the shaft. 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. To start off, remove any brush heads from the top of the handle. Or upgrade to 49mm by 14mm 1.2V NiMH by modifying your brush as shown.Original size 42mm by 14mm 1.2V NiMH with tags (Support us by buying from here).superglue or other cyanoacrylate adhesive) 10-11mm ring spanner or tool with similar sized hole.Small flat-bladed screwdriver: 2 to 4mm wide.scalpel, snap-off, retractable or Stanley type Solder sucker (also known as a desoldering pump) and/or desoldering braid/wick.Solder: Lead-free silver solder is great for this.Soldering iron: Electronics grade (about 18-25 watt).Braun Oral-B Professional Care toothbrush (Type 3754 or 3756).Any damage to yourself, your toothbrush or anything else is entirely your responsibility. Any act carried out by yourself is entirely at your own risk. This guide is for educational purposes only and is offered without guarantee or liability. 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. This is documented in detail below along with lots of pictures. Solder in connections for parts and new battery.Remove charging coil, pressure warning light, pressure switch, PCB and battery.Desolder old battery and other connections from PCB.The type number of your toothbrush is marked on the bottom of the handle.įor other toothbrush models and type numbers the battery replacement procedure is slightly different so please see our other guides to toothbrush battery replacement instead. These include the Professional Care, PRO and TriZone 600, 1000, 20 model names, and others. The tutorial is based on the Type 3756 toothbrush but also applies to Type 3754 toothbrushes. 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. ![]() Which New Electric Toothbrush To Buy in 2023?.Sonicare Toothbrush Spare Parts & Chargers.Philips Sonicare Eas圜lean HX6500 series.Philips Sonicare DiamondClean HX9300 series.
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