For this repair, you will need a Phillips head screwdriver and replacement set of edge sensors.
Make sure Bob’s side power switch is turned OFF and flip him over onto a flat surface. Remove the screw securing Bob’s main brush in place.
Remove Bob’s main brush to access and remove the screw located beneath it (depending on Bob's model, there may be 2 screws).
Remove the 5 screws lining Bob’s underside.
Flip Bob back onto his wheels and lift his cover up. Depending on your Bob's model, you may need to remove 3 or 4 circuit plugs to detach the cover completely. Pinch the small white tab on the side of each circuit plug and pull upwards to remove.
For older versions of Bob, you must remove 3 circuit plugs from the mainboard:
For newer versions of Bob, you must remove 4 circuit plugs from the mainboard:
Slide Bob’s power inlet out and place the cover aside.
Remove the 8 screws holding the 4 edge sensors in place. There are 2 screws on each sensor.
To remove the 2 outermost sensors, feed their wires out from underneath the mainboard.
Be careful not to remove the plastic covers sitting inside Bob while removing his old sensors.
All 4 sensors are attached to the main board by one circuit plug. Detach it from the main board, then plug in your set of replacement sensors. Depending on your Bob's model, your mainboard may look slightly different.
Feed the wires for the 2 outermost sensors back underneath the main board.
Lastly, replace the pair of screws holding each sensor in place.
Now you’re ready to put Bob’s cover back together. First, reattach all the circuit plugs you removed to separate Bob's cover. Press down on each circuit plug to ensure it securely locks in place.
For older versions of Bob, reattach 3 circuit plugs to the mainboard:
For newer versions of Bob, reattach 4 circuit plugs to the mainboard:
Before closing Bob's cover, slide his power inlet back in its place.
Carefully realign the edges of Bob’s cover and flip him onto his back. Replace the 5 screws on his underside to seal his cover together.
Replace the 1 or 2 screws located beneath Bob's main brush.
Place the main brush back in its compartment. Attach the end piece first
and align the square end with the square-shaped notch inside Bob.
Lastly, replace the screw securing Bob's main brush in place and your repair is complete!