Replace of the Hearth Rate Sensor

crwdns2936071:01crwdne2936071:0 — Replacing the lid with hearth rate sensor

As it has been previously observed on various Garmin models, the protective glass gets damaged without notice. This guide will show you step by step how to replace the various components of the clock.

crwdns2936071:02crwdne2936071:0 — Removing the screen

Heat the outer edge with a heat gun to a temperature no higher than 356°F (180°C).

crwdns2936071:03crwdne2936071:0 — Disconnecting the screen from the main board

Once opened, remove carefully the screen's ribbon cable. It is recommended to use plastic tools during the whole process. You should consider that the battery is still connected.

crwdns2936071:04crwdne2936071:0 — Screen and case

Thus, the bottom part of the board with all the sensors is exposed.

crwdns2936071:05crwdne2936071:0 — Removing the clock's brain

Remove the screws using a torx screwdriver.

crwdns2936071:06crwdne2936071:0 — Removing the processor.

Here you can replace the battery if needed. It is soldered through two cables to the clock's motherboard.

crwdns2936071:07crwdne2936071:0 — Replacing the backplate with sensors

Regrettably, the hearth sensor's cover is glued to the backplate. Because of this, it is only possible to find the entire backplate as a replacement. It comes with the following parts.

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To reassemble the watch, follow these steps in reverse.