Introduction

How to dismantle, resolder power switch, and reassemble the BT 250 Baby Monitor

Unclip the battery cover, and remove the batteries (they're a tight fit - the purple ribbon should help though)
  • Unclip the battery cover, and remove the batteries (they're a tight fit - the purple ribbon should help though)

  • Remove the two phillips screws at the lower edge of the battery compartment

The casing is now held together by a pair of snap-fixings on each side, which will require careful prising apart.
  • The casing is now held together by a pair of snap-fixings on each side, which will require careful prising apart.

  • Using the picture as a guide to show where the catches are (red circles), use a small screwdriver or a spudger-type tool to release them levering outwards, then carefully separate the two halves of the casing

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The LCD is held on by a pair of small plastic lugs, one each side.  Release these one at a time, while gently lifting the LCD up from the board.
  • The LCD is held on by a pair of small plastic lugs, one each side. Release these one at a time, while gently lifting the LCD up from the board.

  • Once both clips are released, it will hinge forward and down.

Remove the two screws from under the LCD
  • Remove the two screws from under the LCD

  • Remove the single screw in the middle of the lower part of the PCB

  • Gently bend up the two charging connectors on the lower edge of the PCB that stick through the case to free it

  • Lift the PCB from the case, lower edge first

With the PCB removed, inspect the switches along the top edge.
  • With the PCB removed, inspect the switches along the top edge.

  • On mine, the solder holding the switch mounting tabs to the PCB had failed, leaving both tabs and pads intact

  • Carefully resolder these, ensuring enough heat is applied to ensure a good joint, but without damaging neighbouring components

  • Reassembly is the reverse of dismantling.

  • Remember to bend the charging connectors back into place so they are correctly seated

  • Replace the vibrate motor into its' groove.

  • Ensure the switches all operate correctly before clipping the two case halves back together - sometimes the little pieces of adhesive foam on the 'button pressers' need to be adjusted.

Conclusion

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

davidmpye

Member since: 12/21/2015

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