How to Fix the 0x9A Error in Epson WF-3640 and WF-3620 Printers

Question: I watched your video about the 0x9A error related to the FFC cable in Epson printers. Can this error occur intermittently—showing up one time and not the next—or is it a consistent issue? After cleaning the printhead following your video, I still see no ink on the nozzle check, even after ten head cleanings. Also, you offer two different FFC cable lengths for the WF-3640 and WF-3620. How can I determine which size I need, and is 53 cm the default length?
 
Answer: Thank you for reaching out! We apologize for not getting back to you sooner. We understand how urgent printer issues can be, especially when dealing with error codes like 0x9A. At BCH Technologies, we are committed to giving your question the careful thought it deserves. We are grateful for your support and engagement with our YouTube channel [https://youtube.com/@bchtechnologies], as your feedback is essential for improving our expertise and providing better assistance.
Let’s dive into the possible causes and solutions for your issues.
 

Understanding the 0x9A Error

The 0x9A error code in Epson printers typically indicates a mechanical or electronic failure in the printhead system. Based on our experience:
  • Printhead Failure: Most of the time, a 0x9A error signals a damaged or "toasted" printhead.
  • FFC Cable Damage: About 50% of cases also involve a damaged FFC (Flat Flexible Cable) connecting the printhead to the mainboard.
  • Mainboard Damage: In 100% of cases, the mainboard is partially damaged or malfunctioning due to the electrical faults that triggered the 0x9A error.

Can the 0x9A Error Be Intermittent?

In our experience, the 0x9A error is typically a consistent issue, not an intermittent one. However, there could be exceptions:
  • Loose or Damaged FFC Cable: The error could appear sporadically if the FFC cable is only slightly damaged or improperly seated. This might explain why the printer goes through the motions of printing but fails to produce ink on the page.
  • Partial Electrical Failure: In rare cases, a partially functioning mainboard could cause inconsistent behaviour.

Diagnosing the Nozzle Check Issue

No ink appears on the nozzle check, even after multiple cleanings, reinforcing the likelihood of a toasted printhead or a broken connection.
  1. Check the Printhead: If the printhead is damaged, cleaning cycles won’t resolve the issue. Replace the printhead if necessary.
  2. Inspect the FFC Cable: Remove and carefully inspect the FFC cables connecting the printhead to the mainboard. Look for visible damage, such as creases, tears, or burnt areas.

Determining the Correct FFC Cable Length

For Epson WorkForce WF-3640 and WF-3620 printers, two FFC cables are used:
  • One connects to the left side of the printhead.
  • The other connects to the right side.
The default 53 cm cable is commonly used, but the exact length required depends on the cable's routing and attachment points in your printer model.

Suggested Next Steps

  1. Replace the Printhead: If the printhead is beyond repair, installing a new one is essential to resolve the issue.
  2. Replace the FFC Cables: Replace both FFC cables to ensure proper communication between the printhead and the mainboard.
  3. Inspect or Replace the Mainboard: If replacing the printhead and FFC cables doesn’t resolve the error, the mainboard may need to be replaced. This step requires professional tools and expertise.

When to Seek Professional Repair

Addressing printer issues can be complicated due to the hands-on nature of the problems. We’re not able to provide remote troubleshooting, suggestions, or support for printer repairs. However, we offer an in-person evaluation and repair service via our local diagnostic facility [https://bchtechnologies.com/printer-repair-service].
Given the high demand, we operate on a first-come, first-served basis. It might take a few weeks to get your printer to drop it off or mail it to us. Our services are structured to repair a whole printer or specific parts, with clear instructions on proceeding if you opt for mail-in or local drop-off services.
However, we highly recommend exploring self-help resources like our YouTube channel [https://youtube.com/@bchtechnologies]. Use the search icon to find tutorials on specific topics or explore similar content suggested by YouTube.
 
Thank you again for your patience and for reaching out. We hope this guide helps resolve the 0x9A error in your Epson WF-3640 or WF-3620 printer. Best of luck, and don’t hesitate to contact us if you need further assistance!