How to Fix Epson ET-8550 Error Code 031006 After DTF Conversion

Customer Question:

I’m assisting a client who recently converted their Epson ET-8550 for DTF printing. However, the printer is now displaying Error Code 031006 at startup. I’ve already verified that there’s no debris, the encoder strip and rail are clean, and I’ve reinstalled the printhead bracket and ribbon cables carefully. The error persists and mentions "foreign material." I’m considering using the Epson Adjustment Program, but before I go further, is there BCH-specific guidance or a product that could help resolve this?

Answer:

Understanding Epson ET-8550 Error 031006

Error Code 031006 is a well-known issue that generally points to a printhead communication fault or "head fuse broken" scenario. This is especially common in printers that have been converted to DTF, where third-party inks and more frequent disassembly may introduce instability.

While the printer message may refer to “foreign material,” the root cause typically lies in electrical faults involving the printhead, FFC cables (flat flexible cables), or mainboard circuitry.

Step-by-Step Troubleshooting for 031006:

1. Power Down and Unplug

Always start by fully powering off the printer and disconnecting it from its power source to avoid any electrical shorting during inspection.

2. Check the FFC (Flat Flexible Cables) for Damage or Misalignment

This is the most common culprit post-reassembly.

• Look for creases, tears, or ink stains on the ribbon cables that link the mainboard to the printhead.

• Inspect for misalignment—even slight offsets in the pins can cause this error.

• Make sure both ends of the FFCs (especially where they connect to the printhead carriage) are fully inserted and locked down.

• Be wary of oxidation or residue on the contacts—clean them gently with isopropyl alcohol and allow to dry.

3. Inspect the Printhead for Damage

It’s not uncommon for the printhead to fail during or after a DTF conversion due to thermal overload, ink leakage, or a surge.

• Look closely at the pins where the FFCs attach.

• If the error developed after a cleaning cycle or ink charge, the printhead may have shorted internally.

4. Examine the Mainboard for Blown Fuses or Burned Components

The F301 fuse on the mainboard is most commonly linked to printhead protection.

• Use a multimeter to test continuity across fuses.

• If the fuse is blown, you may also want to check nearby components such as MOSFETs and capacitors. A shorted printhead often damages one or more of these as well.

• If you're comfortable with soldering, replacing the fuse might restore the circuit—but do so only if you're sure the printhead is not internally shorted, or the replacement fuse will blow again.

5. Re-seat or Replace the Carriage PCB (if accessible)

Sometimes the issue lies not in the cables or the board, but in the small PCB board on the printhead carriage where the FFCs plug in.

• Gently re-seat or replace the PCB if you suspect corrosion or damage.

6. Consider Running the Epson Adjustment Program

While the Epson Adjustment Program (also known as Service Mode software) is not guaranteed to fix electrical faults, it may help:

• Reset counters, which can sometimes trigger false error states.

• Perform nozzle charge routines, though these should only be done after confirming hardware is intact.

Please note: if the problem is caused by physical or electrical failure, software tools alone won’t be enough.

7. If All Else Fails: Consider Component Replacement

If you’ve checked all the above and still see the 031006 error, your next steps are likely:

• Replace the printhead, which may be internally damaged.

• Replace or repair the mainboard, especially if the fuse is blown or nearby components are heat-damaged.

These parts are sensitive and expensive, so it’s important to verify with certainty before replacing.

BCH-Specific Resources

We do not currently offer a product to directly "clear" 031006, as it's almost always a hardware issue. However, we recommend the following:

• Refer to our YouTube channel [https://youtube.com/@bchtechnologies] and search for videos related to “Epson mainboard repair,” “FFC alignment,” or “printhead fuse.”

• Explore our printer repair service [https://bchtechnologies.com/printer-repair-service] for hands-on support if you're local or able to mail in your unit.

Additional Repair Considerations

Printer troubleshooting—especially post-conversion—is a hands-on process that can’t always be solved remotely. As such, we’re unable to offer one-on-one repair support online. However, we do offer walk-in and mail-in repair services at our local diagnostic facility [https://bchtechnologies.com/printer-repair-service]. Due to high demand, this is on a first-come, first-served basis, and there may be a few weeks’ wait before we can process your unit.

Our services include both part-specific and full-unit repairs. While our rates may not be the most economical, we aim to deliver thorough, precision-level service. For those interested in self-repair, we strongly recommend beginning with a search on our YouTube channel [https://youtube.com/@bchtechnologies]. Use the magnifying glass icon next to "About" to find videos by keyword. We’ve produced hundreds of videos over the years and many common issues are covered there.

Thanks again for your question—and for considering BCH as a trusted resource. We’re honored to support technicians like you, and we look forward to helping you and your clients succeed.