Alarm System Transmitter: Service and Repair

Replacing Battery

1. Insert the blade of a small, flat bladed screwdriver into the slot at the rear of the handset and pry the back from the handset.
2. Slide the battery out of the clip taking care not to touch the circuit board or the battery contacts.
3. Press and hold one of the buttons for at least 5 seconds.
4. Fit the replacement battery ensuring that correct polarity is maintained (+) side facing upwards. Avoid touching the flat surfaces of the battery.
5. Press the 2 halves of the handset together.
6. Check that handset operates correctly.