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The Philips Sonicare has a lot of votes on the internet, good and bad. Good especially as long as the product works, bad because it does not last very long.

    • Seen from below, the handpiece is oval-shaped. Wrap with a cloth, with a pair of pliers, a nutcracker or similar. start where the feet are and put the oval in a circle. At the same time, press the handpiece upside down, ie with the metal shank in front, onto a wooden base, whereby the inner life is expelled.

  1. Repair electronics, Remove handpiece base: step 2, image 1 of 1
    • Remove the underside of the handpiece by carefully lifting the tabs at the two farthest vertexes of the oval with a small screwdriver.

  2. Repair electronics, Remove the rubber pad from the motherboard: step 3, image 1 of 1
    • Remove the rubber pad from the motherboard

  3. Repair electronics, Remove plastic cap from metal shaft: step 4, image 1 of 1
    • Use a puller to remove the plastic cap from the metal shaft to expose the defective rubber boot.

    • Thoroughly clean all housing parts with water and cloth.

    • Thoroughly clean the electronics and mechanics with isopropyl alcohol and a fine brush.

    • Also completely rid the metal shaft of any residue.

  4. Repair electronics, Repair electronics: step 6, image 1 of 1
    • Place the inner workings of the handpiece without housing parts in a container in such a way that the main board points downwards and the battery points upwards.

    • Now fill the container with isopropyl alcohol just enough so that the liquid level reaches the circuit board.

    • Leave to stand for 1-2 hours under supervision, then remove the device from the liquid bath and allow to dry.

  5. Repair electronics, Replace rubber sleeve: step 7, image 1 of 1
    • The defective rubber sleeve on the metal shaft must be replaced. A spare part is available for less than € 4 on eBay under the following designation: "Philips electric toothbrush Waterproof sealing parts for HX6730 HX6930 HX9340».

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Repeat the steps in order to reassemble your device.

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Gerd Conzetti

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