User-level Maintenance Procedures

The OT-2 is designed for years of reliable, full-time operation. If your robot requires service, you should not attempt to repair it unless directed by Opentrons Support. This section provides instructions for performing some circuit board replacements on a limited self-service basis.

Warning

Never perform these procedures with the OT-2 powered on or plugged in. Always turn off the power to the robot and unplug it from the wall outlet before you begin.

Replacing the motor controller board

This printed circuit board assembly (PCBA) controls the motors responsible for pipette movement. It is attached to the pipette carriage LINK REMINDER TO SYS DESC beneath the carriage cover. The information in this section explains how to:

• Remove and replace the pipette carriage cover.
• Disconnect, remove, and replace the motor controller board.

This procedure requires the following tools:

• 2 mm hex screwdriver
• 2.5 mm hex screwdriver
• T10 Torx screwdriver
• A small flathead screwdriver

Removing the carriage cover

1. Use a 2.5 mm hex screwdriver to remove the top, front, and side window panels on the robot. Detaching these panels gives you better access to the gantry and pipette carriage.

2. Use a 2 mm hex screwdriver to remove the 2 screws from the perforated cover on the top of the carriage cover and a 2.5 mm hex screwdriver to remove the 2 screws from the back of the carriage.

   

3. Use a 2.5 mm hex screwdriver to remove the remaining 4 screws from the back of the cover.

   

4. Slide the carriage cover down and then pull it off to expose the motor controller board.

Removing the controller board

4. Disconnect the cables shown below from the controller board.

   

5. Find this green connector and use a small flathead screwdriver to loosen the screws that hold the 2 wires in place.

   

6. Use a 2.5 mm hex screwdriver to remove the screws that hold the PCBA to the carriage and remove the board.

   

Installing a new controller board

7. Hold the new board in place.

8. Use a 2.5 mm hex screwdriver to reattach the board with the screws you removed while taking it off the robot.

9. Reconnect all the cables.

10. Reattach the carriage cover.

After installing a new board, follow up with Opentrons Support for further troubleshooting steps or instructions.

Replacing the rear panel boards

The two PCBAs mounted inside the back panel of the OT-2 provide other command, control, network, and power distribution functions. The information in this section explains how to:

• Remove the back panel cover and identify the main components in this area.
• Disconnect, remove, and replace the PCBAs housed in this location.

This procedure requires the following tools:

• 2.5 mm hex screwdriver
• T10 Torx screwdriver

Removing the rear panel cover and boards

1. Use a 2.5 mm hex screwdriver to remove the short and long screws that fasten the back panel to the robot.

   

2. Disconnect any cables connected to the board you're working with.

   

3. Use a T10 Torx screwdriver to remove the screws that hold the PCBAs to the robot and remove the board you want to work with or replace.

4. Hold the new board in place.

5. Use a 2.5 mm hex screwdriver to reattach the board with the screws you removed while taking it off the robot.

6. Reattach all the cables.

7. Use a 2.5 mm hex screwdriver to reattach the rear panel cover to the robot.

After installing any new boards, follow up with Opentrons Support for further troubleshooting steps or instructions.