To replace Junior’s edge sensors, you’ll need a Phillips head screwdriver, the flat-head screwdriver included in Junior’s box, and a new set of edge sensors.
Before starting any repair on Junior, turn his side power switch OFF and remove his dustbin.
Then, flip Junior over onto a flat surface and remove his main brush using the flat head screwdriver. Keep all removed screws and parts safely aside, as they may be needed for later reassembly.
Use a Phillips head screwdriver to remove the 7 screws on Junior’s underside that hold him together.
Junior’s cover is no longer secured, so hold the top and bottom together as you carefully flip him back onto his wheels. Grip Junior’s cover from the back and lift up to expose the mainboard.
Slide the power inlet down and tuck it somewhere safe to avoid compressing its wires.
To detach Junior’s cover completely, disconnect 4 circuit plugs.
Junior’s cover is now completely detached and can be set aside for the rest of the repair.
There are 4 edge sensors on Junior’s underside, along his front.
There are 2 screws holding each sensor in place. Remove all 8 screws and save them for later reassembly.
Feed the wiring for the 2 outermost sensors out from under the mainboard, toward Junior’s front wheel.
Do not remove the plastic sensor covers from inside Junior. If a cover moves out of place, simply place it back in the appropriate spot.
Next, disconnect the sensors from the mainboard. Push the small tab on the side of the circuit plug and pull up to disconnect.
Now plug the new edge sensors to the top of the mainboard. Feed the wires for the 2 outermost sensors underneath the mainboard and replace them with the green side facing up.
Reinstall the 2 screws on each sensor.
Reattach all 4 circuit plugs connecting Junior’s cover to the mainboard.
Remember to slide the power inlet back into its space on Junior’s cover.
Align the cover’s edges precisely. Then, flip Junior over onto a flat surface.
Ensure that no wires are compressed in the main brush compartment or visible at the edges of the bumper. If so, take a step back and lift the cover to tuck the wires into the appropriate spaces inside Junior.
Once the wires are all safely tucked away and Junior’s cover is aligned properly, reinstall all 7 screws previously removed from Junior’s underside.
Install the main brush and dustbin before your next use and Junior is completely reassembled!