How to Fix Epson WF-7720 Error Code 033506

Question:

I've encountered an error code 033506 on my Epson WF-7720 printer. What should I purchase to fix this error, and can you provide instructions on how to fix it?

Answer:

Thank you for reaching out to us at BCH Technologies. We appreciate your engagement and support, particularly with our YouTube channel, BCH Technologies. Your feedback plays a crucial role in further developing our technical expertise.

The error code 033506 on your Epson WF-7720 printer typically indicates a "Light excessive error." This error can be caused by several factors:

1. Abnormal Sensor Output:
   • Cause: This issue can arise from sensor failure or a malfunction on the PIS (Photo Ink Sensor) board. If your printer is exposed to excessive light, such as direct sunlight, it can trigger this error.
   • Solution: Try moving your printer to a darker environment to see if the error persists. If this resolves the issue, it was likely due to excessive light exposure.
2. PIS Sensor Malfunction:
   • Cause: If relocating your printer does not fix the issue, it might be due to a continuous activation of the PIS sensor caused by a fault.
   • Solution: You can purchase a replacement PIS sensor (Part No. A2140859) from our website here [https://bchtechnologies.com/epson-a2140859-pis-sensor-photo-ink-sensor-or-passive-infrared-sensor-for-workforce-and-expression-xp/]. We also provide a helpful installation video on that page to guide you through the replacement process.
3. Mainboard Malfunction:
   • Cause: A less common but possible cause of the 033506 error is a malfunction in the printer’s mainboard. The mainboard controls various functions of the printer, including sensor operations.
   • Solution: If there's an issue with the mainboard, it might fail to regulate the sensor correctly, leading to persistent error messages. Resolving this typically requires professional diagnostics and potentially replacing the mainboard. This is a more complex fix and might necessitate professional assistance.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. 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. So, it might take a few weeks before we can get your printer to drop it off or mail it to us. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed if you opt for mail-in or local drop-off services. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage [https://youtube.com/@bchtechnologies]. Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be most efficient. Plus, YouTube might suggest relevant videos from other channels that could assist you.

Thank you once again for contacting us. We hope this information helps you resolve the error on your Epson WF-7720 printer.