Introduction

Philips Sonicare DiamondClean HX9340 Toothbrush Handle that does no longer charge. The replacement of the battery hopefully rectifies this.

Here is the Philips Sonicare handle HX9340 that no longer holds a charge This is the bottom endcap that requires removal. A few layers of cardboard gets wrapped around the handle to protect it from any marring or other damage.
  • Here is the Philips Sonicare handle HX9340 that no longer holds a charge

  • This is the bottom endcap that requires removal.

  • A few layers of cardboard gets wrapped around the handle to protect it from any marring or other damage.

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Using a pair of pliers to apply some pressure round the handle. The best place to start is the wider part of the rectangular base and about 1/2" to 3/4" from the bottom Continue to apply pressures around the whole base of the the handle moving to each side of the rectangular base. It may take a few complete rotations to finally open up the gap between base and handle.
  • Using a pair of pliers to apply some pressure round the handle. The best place to start is the wider part of the rectangular base and about 1/2" to 3/4" from the bottom

  • Continue to apply pressures around the whole base of the the handle moving to each side of the rectangular base.

  • It may take a few complete rotations to finally open up the gap between base and handle.

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Once the gap opens up, utilize a small flathead screwdriver to insert it into the gap to widen it. Endcap coming out of the handle. Once the gasket will become completely visible the endcap can be removed.
  • Once the gap opens up, utilize a small flathead screwdriver to insert it into the gap to widen it.

  • Endcap coming out of the handle. Once the gasket will become completely visible

  • the endcap can be removed.

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Here is the endcap showuing the tabs that hold it securely in place once instered There will be two plastic tabs that hold the inner workings to the outside handle. These are hard to reach and not easy to see. Using a long small flathead screwdriver (or similar tool) to find those tabs is the difficult part on this job.
  • Here is the endcap showuing the tabs that hold it securely in place once instered

  • There will be two plastic tabs that hold the inner workings to the outside handle. These are hard to reach and not easy to see.

  • Using a long small flathead screwdriver (or similar tool) to find those tabs is the difficult part on this job.

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Once the tabs have been properly located, insert one tool on ach side to losen compress the bas and apply downward presure on the outer handle. For this the top end of the handle needs to rest against a solid base. It does require a considerable amount of downward force to accomplish this. With the tabs loosened and the handle opushed downward, the inner workings of the toothbrush will loosen and pop out of the handle. Remove the mechanics out of the handle.
  • Once the tabs have been properly located, insert one tool on ach side to losen compress the bas and apply downward presure on the outer handle. For this the top end of the handle needs to rest against a solid base. It does require a considerable amount of downward force to accomplish this.

  • With the tabs loosened and the handle opushed downward, the inner workings of the toothbrush will loosen and pop out of the handle.

  • Remove the mechanics out of the handle.

I found I had to use two very thin (almost sharpened) flat screwdrivers to get between the taps and the outer handle. And then push down the outer handle. It's no use just pushing the inner base down.

Geos Yannis - Reply

I found I had to use two very thin (almost sharpened) flat screwdrivers to get between the taps and the outer handle, to push them towards the center (i.e. each other), so that they unlock from their recess in the outer handle. And then push down the outer handle to slide out the inner workings. It's no use just pushing the inner base down.

Geos Yannis - Reply

Remove the rubber protectors from the PCB side as well as the battery. Here is the battery to be replaced. Sanyo part number 4235 010 13068
  • Remove the rubber protectors from the PCB side

  • as well as the battery.

  • Here is the battery to be replaced. Sanyo part number 4235 010 13068

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There are three places that will have to be desoldered. Positive battery contact Negative battery contact
  • There are three places that will have to be desoldered.

    • Positive battery contact

    • Negative battery contact

    • and a jumper

  • For the jumper the only thing required is to remove the solder between the pads.

  • Apply some flux to the jumper. The pliers will help to stabilize the PCB during soldering. any other means to hold it steady can be used.

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Using a soldering iron, remove the solder bridge between the jumper pads. Using flux and desoldering braid remove the solder from the negative tab of the battery. Solder bridge from jumper cleaned
  • Using a soldering iron, remove the solder bridge between the jumper pads.

  • Using flux and desoldering braid remove the solder from the negative tab of the battery.

  • Solder bridge from jumper cleaned

  • Negative battery tab unsoldered from PCB

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Apply flux to the positive contact of the basttery on the PCB (Incidental finding is a SMD fuse F1 on this PCB) Using desoldering braid unsolder the positive contact from the PCB. Apply some gentle pressure with a small tool to remove the battery.
  • Apply flux to the positive contact of the basttery on the PCB (Incidental finding is a SMD fuse F1 on this PCB)

  • Using desoldering braid unsolder the positive contact from the PCB.

  • Apply some gentle pressure with a small tool to remove the battery.

  • The battery should remove easily. If it does not, double check the battery contacts on the PCB to ensure they are not still connected somewhere. Another going over with the soldering iron may be required to complete that task.

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Battery removed from the PCB and the solder pads on the PCB are now clearly visible In an attempt to determine the type off battery the red plastic covering was removed.  The battery is a 3.7V lithium-ion battery that measures approximately (rounded) 14mmX49mm. Roughly the size of a AA battery.  measure The groove on the battery is always on the positive end of the battery.
  • Battery removed from the PCB and the solder pads on the PCB are now clearly visible

  • In an attempt to determine the type off battery the red plastic covering was removed. The battery is a 3.7V lithium-ion battery that measures approximately (rounded) 14mmX49mm. Roughly the size of a AA battery. measure

  • The groove on the battery is always on the positive end of the battery.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

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oldturkey03

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3 Comments

This has helped me a lot and i used it as a base for my fixit tutorial. Thank you!

moritz - Reply

Hallo moritz, bitte tausche in deiner Anleitung die Sprache in Englisch da jetzt die Deutsche Anleitung in Englisch geschrieben ist.

Claes -

Nach dem wechsel der Batterie leuchten alle Lampen, aber die Bürste gibt keine Vibrationen ab. Wo ist der fehler? Hatte jemand dieses Problem?

After replacement of the akku all lamps are flashing but there is no function of the vibration-module. anyone knows this problem?

matze - Reply

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