Replace the Edge Sensors

To replace the edge sensors on Bob PetHair Plus, you will need a Phillips head screwdriver, a flat head screwdriver, and a new set of edge sensors.

Before starting any repair on Bob, turn his side power switch OFF and remove his dustbin.

Then, flip Bob 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 6 screws on Bob’s underside that hold him together.

One screw on each side of the front wheel. One screw to the right of the main brush motor.

One screw on each side of the dustbin. The final screw is in the brush compartment.

Bob’s cover is no longer secured, so hold the top and bottom together as you carefully flip him back onto his wheels.

Grip Bob’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 Bob’s cover completely, disconnect 4 circuit plugs:

Two at the lower edge of the mainboard, near the wheels.

And two more at the top edge, near the bumper.

Bob’s cover is now completely detached and can be set aside for the rest of the repair.

There are 4 edge sensors on Bob’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 Bob’s front wheel.

Do not remove the plastic sensor covers from inside Bob. 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 into 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.

Once all the sensors are secured, you’re ready to close Bob’s cover.

Reattach all 4 circuit plugs connecting Bob’s cover to the mainboard.

2 connect to the top edge of the mainboard, and 2 more that connect to the bottom edge.

Remember to slide the power inlet back into its space on Bob’s cover.

Align the cover’s edges precisely. Then, flip Bob 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.

Once the wires are all safely tucked away and Bob’s cover is aligned properly, reinstall all 6 screws previously removed from Bob’s underside.

Install the main brush and dustbin before your next use and Bob is completely re-assembled.

Turn the side power switch back on and congratulations! You’ve just replaced Bob’s edge sensors. Happy cleaning!