Epson WF-7720 Maintenance Box Replacement Solution: Home Remedy

Question:

I installed my maintenance box on my Epson WF-7720, and the printer still says it hasn’t been replaced. The error won’t clear. What can I try next?

Answer:

Possible Causes and Fixes

Defective or Not Recognized Maintenance Box

New maintenance boxes can also be faulty at times. Test with a different maintenance box to see if the issue is reproduced.

You can use an OEM (original Epson) maintenance box, especially if you’re using a third-party one, as it has been known that the printer does not fully recognize some 3rd party boxes.

Resetting the Maintenance Box

If the printer does not recognize the new maintenance box, you might need a resetter tool to reset the chip.

One available option online is a maintenance box resetter for Epson WF-7720. These devices reset the chip so the printer "thinks" the maintenance box is "new."

Insufficient print count for the given Printed Circuit or Printer.

The printer runs a chip-reading mechanism to check the condition of the maintenance box, which can sometimes be the limit switches on the Waste CSIC (Chip Sensor Integrated Circuit).

Open the compartment for the maintenance box and examine the metal contact pins that touch the chip inside.

Check for bent or misaligned pins. If you notice any, carefully reposition them with a small tool, such as tweezers.

Replace the flexible flat cable (FFC) retainer. If the maintenance box chip cannot read, loose connections could be the cause.

Power Cycle the Printer

Resetting the printer can sometimes clear the error. Try the following:

Remove the maintenance box.

Shut down the printer and disconnect it from the power supply.

Wait for at least 5 minutes for the internal memory to reset.

Unplug the printer and put the maintenance box back in.

Now you can power it back on and see if the error is gone.

Firmware Issues

If your printer has been recently upgraded to a new firmware version, it might prevent third-party maintenance boxes from being recognized.

If you recently updated the firmware, try rolling back to the previous version, alternatively you can turn off the automatic firmware update to avoid future compatibility issues.

Final Thoughts

Printer issues get complicated since they can be technical, but they can also be more hands-on. We cannot troubleshoot printer repairs remotely. We have a local diagnostic center (https://bchtechnologies.com/printer-repair-service) that can evaluate and repair your printer, but due to demand, repairs are first-come, first-served, and you may have to wait a few weeks before your printer can be worked on. We provide either complete printer repair or individual part repair, along with specific instructions and steps on what to do. However, our rates are not the most economical, so we suggest you try to find a solution using self-help resources before contacting us.

This should be used for DIY troubltroubleshootingi, we suggest you visit our YouTube channel (https://youtube.com/@bchtechnologies). The search function can bring up specific repair videos—click the magnifying glass icon to the right of “About” on the menu bar’s right-hand side. After over nine years’ worth of video content, I get dozens of emails every day wanting to know about a specific issue, so very often the easiest way for you to find your solution is just to search YouTube. YouTube might even recommend other helpful videos from different channels.

I hope this information helps solve the issue! We appreciate your support. If you need more help, visit our website or our YouTube channel. If you have any other questions, please let me know.