Are you looking to remove the mainboard from your Epson EcoTank ET-8550 printer? Whether you're troubleshooting an issue or upgrading your printer, removing the mainboard is a crucial step. In this guide, we will walk you through the process, step by step, to ensure a successful removal. Follow along as Abby from BCH Technologies demonstrates the process in our lab.

Section 1: Removing the Left Panel

To begin, let's start by removing the left panel of the printer. This involves taking out the screws on the side and carefully detaching the panel. Here's how you can do it:

1. Locate and remove all the screws on the left side of the printer.
2. Gently push the panel backward, but be cautious of it getting stuck on the long back piece.
3. Once the panel is loose, angle it downwards and pull it towards you to detach it.
4. Proceed to remove the back long panel by moving it towards you at an angle.

Section 2: Removing the Right Panel

Now that we've removed the left panel, let's focus on removing the right panel, where the mainboard is located. Follow these steps:

1. Disconnect the white cable with the gray and two white wires, along with the two small FFC cables.
2. Wiggle the front panel to ensure it is disconnected.
3. Flip the printer over to the other side.
4. Remove the screw from the gray area on top of the printer and open the gray cover where the ink is.
5. Locate and remove the two screws in the ink area.
6. Flip the printer onto its back and gently pry off the tabs on the bottom to lift off the front panel.

Section 3: Removing FFC Cables

With the front panel removed, it's time to disconnect the remaining cables that connect to the mainboard. Here's what you need to do:

1. Look behind the power area in the back of the printer.
2. Disconnect all the cables and wires that go to the mainboard.
3. If you're unsure about any cables, visit bchtechnologies.com and search for ET-8550 for detailed instructions or refer to the link provided above the video.

Section 4: Removing the Mainboard Screws

Now that you have disconnected all the necessary cables, it's time to remove the mainboard screws. Follow these steps carefully:

1. Double-check that all the FFC cables and wires are disconnected from the back of the mainboard.
2. If there's a piece of tape covering a wire, remove it to access the connector.
3. Disconnect the wire and ensure that everything is properly disconnected.
4. Remove the ground wires located on the left and right sides of the mainboard.

Section 5: Removing the Mainboard

With the cables and screws detached, you can now remove the mainboard from your Epson ET-8550 printer. Here's how to proceed:

1. Carefully remove the bottom screw holding the mainboard in place, being cautious of the delicate disc.
2. Flip the printer onto its side.
3. Remove the two screws from the bottom that secure the mainboard.
4. Once the screws are removed, gently slide the mainboard out of the printer.

Section 6: Conclusion

Congratulations! You have successfully removed the mainboard from your Epson EcoTank ET-8550 printer. This process may seem intricate, but by following the steps outlined above and watching the accompanying video, you can complete it with ease. Remember to handle all components with care and keep track of the screws for reassembly.

Video Tutorial: 

We hope this guide has been helpful to you