Adjusting iRobot Braava Jet 240 magnetic contact sensors

ID: 149333

Description: If your Braava Jet 240 is behaving erratically,...

Steps:

1. Turn the device off.

2. Use your fingers to gently pop out the battery.

3. Lift up the handle to reveal the eject button.

4. Use your finger to push the eject button forward.

5. Tilt the robot on its side and let the mop pad slide out.

6. Remove the two 22.0 mm screws on the bottom-front of the robot using a Phillips #1 screwdriver.

7. Use a Phillips #1 screwdriver and an iFixit opening tool to remove the two 15.0 mm screws on the front sides of the robot.

8. Carefully pull back on the front shell to remove it from the robot.

9. Insert a Phillips #1 screwdriver through the screw holes.
10. Unscrew the two 9.7 mm screws.

11. Unscrew the four 9.7 mm screws using a long neck #1 Phillips screwdriver.
12. If the screws are unscrewed but do not come out easily, turn the robot upside down and gently shake it.

13. Pull up on the back shell to remove it from the robot.
14. For reassembly, pop the mop pad release trigger back into place if it fell out during back shell removal.

15. First pull up, then pull down on the spring to detach it from the hooks.

16. Lift up on the motherboard case and pull it forward to remove it from the device. This will expose the free-floating platform, as well as motors, water tubing, and the magnetic sensor pads.

17. Carefully pry the magnets to raise them up with respect to the free-floating platform, but not so much that they rub against the bottom of the motherboard case.
18. The idea is to shrink the gap between the magnet and the motherboard case so as to improve the performance of the inductive sensor.