Einleitung
How to dismantle, resolder power switch, and reassemble the BT 250 Baby Monitor
Werkzeuge
-
-
Unclip the battery cover, and remove the batteries (they're a tight fit - the purple ribbon should help though)
-
-
-
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
-
-
-
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 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.
-
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.
-
To reassemble your device, follow these instructions in reverse order.
