Sensor always reads closed.
Sensor always reads closed, even with door open. Communication with base station is normal. Removed circuit board from case. Sensor reed switch on circuit board reads open with multimeter.
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Hi @john77792,
What is the model number of the alarm system?
Post some close up images of the board (both sides if applicable) back here.
here's how on ifixit Ajout d'images à une question existante
par jayeff
Hi @john77792,
Does the sensor measure short circuit i.e. 0.00 Ohms when you place a magnet near it to operate the reed?
Nothing appears to be amiss, so you may have to trace where each leg of the sensor goes and check what other components are connected to each trace along the way.
Are there pcb traces on the underside of the board for the through hole components or are they just soldered that way to anchor them more securely?
par jayeff