Both bObsweep Standard and Pethair models have two bumper sensors on the inside of their covers. Whenever Bob runs into a wall or other obstacle, the sensors will tell Bob to back away. If bObsweep does not change direction after bumping into something, the following instructable may help you fix this. Refer to the video or written steps to replacing the bumper sensors on Bob.
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Step 1: Disconnect BObsweep's Cover
Flip Bob over and remove the screws on the underside. They hold the cover together.
There are two screw holes inside the brush compartment: one in the centre, one on the left end. Remove both and keep aside for reassembly.
There are five more screws around bObsweep's edges. Two are installed at the top and bottom, and one on the right end of the main brush.
Remove the main brush. Unscrew the holder, and lift the brush out. Keep this screw separate from the others.
Note: Depending on your model, there may be only 6 screws installed on bObsweep.
Step 2: Disconnect the Cover's Circuit Plug
Flip bOb back over so you can see the screen. Lift the cover up to reveal bObsweep’s main board and detach the power inlet from the cover. Grip it and slide it out.
Remove three circuit plugs from the motherboard. Pinch the small white tab on the side of each circuit plug and pull straight up to detach from the motherboard.
1. On the bottom left corner: a small connector with red, black and white wires.
2. One thick white wire that attaches on the right side of the previous connector.
3. On the top edge of bOb’s motherboard: a wide multicoloured connector.
Step 3: Remove the Bumper Sensors
There are two sensors that touch the inside of bOb’s bumper. They are wired to one another as well as one circuit plug.
To remove these , uninstall the two screws holding them in place. Then, lift each sensor up.
Step 4: Install the Replacement Sensors
Place your new sensors in the open spaces on Bob's cover.
Make sure you place the red-wired sensor on the left side.
The black wired sensor should be installed on the right side during the repair.
Replace the screws in the innermost hole on each sensor, so they are closer to the center of Bob's bumper.
Step 5: Connect the Cover Circuit Plugs
Slide the power inlet back into the space on bObsweep’s cover.
Attach the widest circuit plug with multicoloured wires, on the top right edge of the motherboard.
Attach the smallest circuit plug in the lower left corner of the motherboard.
Attach the all-white circuit plug to the bottom of the motherboard, on the right side of the previous plug.
Note: There should be one empty space in the centre of the bottom row.
Put bObsweep's top back on, and align the edges precisely.
Step 6: Secure Bob's Cover Screws
Use a phillips head screwdriver to reinstall the screws you removed to start this repair, so the cover is sealed together.
There are five along the edges of bObsweep's underside. Plus one or two more in the screw holes inside the brush compartment.
Note: Depending on your bObsweep model, there may be only one screw in the brush compartment.
Step 7: Install the Main Brush
Re-install the main brush before setting bObsweep to clean again.
- Attach the end piece first.
- Put the square end in the square space inside bObsweep, then lower the brush in place.
- Install the screw securely.