iRobot Roomba lädt nicht - hier der 980

Introduction

This tutorial will guide you through troubleshooting and repairing an iRobot Roomba 980 that is not charging. If the battery is not the issue, the problem may lie with a faulty transistor. Instead of purchasing a new charging station, you can replace the transistor, which is a cost-effective solution.

Step 1: Gather Necessary Tools and Materials

Before you start the repair process, ensure you have the following tools and materials on hand:

• Transistor: BDP948
• Soldering Tools:
  • Soldering station (e.g., ERSA soldering station)
  • Desoldering pump or desoldering braid
  • Solder (preferably leaded)
• Test Equipment:
  • LCR-T4 component tester
  • Multimeter or a similar device for voltage testing
• Safety Equipment:
  • ESD mat to prevent static damage
  • Safety glasses

You can find many of these items online, such as on Amazon or specialized electronics shops.

Step 2: Disassemble the Roomba

Carefully disassemble the Roomba to access the circuit board:

1. Remove the screws: Use a screwdriver to take out the screws securing the cover.
2. Detach the cover: Gently lift off the cover to expose the internal components.
3. Locate the charging port circuit: Identify the section of the circuit board that contains the charging port and the transistor.

Step 3: Identify and Test the Transistor

Once you have access to the circuit board:

1. Inspect the transistor: Look for any visible signs of damage, such as burn marks or discoloration.
2. Test the transistor:
   • Use the LCR-T4 component tester to check if the transistor is functioning correctly.
   • If it fails the test, prepare to replace it.

Step 4: Remove the Faulty Transistor

To replace the faulty transistor:

1. Desolder the old transistor:
   • Heat the soldering iron and place it on the solder joints of the transistor.
   • Use a desoldering pump or braid to remove the melted solder.
   • Carefully lift out the old transistor from the board.

Step 5: Install the New Transistor

Now it's time to install the new BDP948 transistor:

1. Position the new transistor: Insert the new transistor into the circuit board, ensuring it is oriented correctly.
2. Solder the connections:
   • Heat the soldering iron and apply solder to the joints where the transistor connects to the board.
   • Ensure there are no solder bridges between connections.

Step 6: Reassemble the Roomba

After the transistor has been replaced:

1. Reattach the cover: Place the Roomba cover back on.
2. Secure with screws: Tighten all screws to ensure everything is in place.

Step 7: Test the Roomba

Before concluding the repair, test the Roomba to ensure it charges correctly:

1. Connect the Roomba to the charger: Plug it into the charging station.
2. Check if it starts charging: Look for indicator lights to confirm the charging status.

Conclusion

By following these steps, you can effectively troubleshoot and repair your iRobot Roomba 980 if it fails to charge. Replacing the faulty transistor can save you money compared to buying a new charging station. Always ensure that you use proper safety precautions while working with electronic components. If the Roomba still does not charge after this repair, consider seeking professional help or further diagnostics.