How to Fix the "Set Jig" Error on Epson EcoTank ET-2650: Firmware & EEPROM Solutions

Customer Question:
I’m having the same issue with my Epson EcoTank ET-2650 printer—it's showing a “Set Jig” error. How can I fix this? Can you help?

Answer:

Understanding the "Set Jig" Error

The “Set Jig” message is not a standard end-user error but rather a manufacturing-level firmware flag. In Epson's production process, printers are partially assembled and tested using what’s known as a "jig"—a factory test rig. To enable this testing mode, a flag is turned on in the printer’s firmware.

Once the unit passes inspection and is fully assembled for retail sale, the manufacturer disables this flag (i.e., the printer is removed from “jig mode”), making the message disappear. If you're seeing the “Set Jig” error, it typically means:

• The printer's firmware was never finalized properly, OR

• The firmware has become corrupted, causing the printer to revert to factory jig mode.

Solutions for the "Set Jig" Error

There are a few potential approaches, depending on your technical comfort level:

1. Firmware Restoration via EEPROM

The most effective method is to replace or reprogram the EEPROM chip on the printer's mainboard. EEPROM (Electrically Erasable Programmable Read-Only Memory) stores the firmware instructions for your printer.

• You can try copying a binary dump (BIN) file from a working EEPROM and flashing it to the chip using a programmer.

• Alternatively, replacing the EEPROM with a correctly pre-programmed unit is often more reliable, especially for non-technical users.

Keep in mind that this procedure requires desoldering/soldering skills or the use of a chip programmer like a CH341A.

2. Resetting the Jig Flag via Firmware Tools

In some cases, Epson’s internal software tools (used in factory or service settings) allow the jig flag to be manually turned off.

• However, these tools are not publicly available and usually require a password or specific version that matches your printer model.

• Some third-party reset utilities or cracked service software claim to fix this, but use them with caution—they can further corrupt your printer or violate software policies.

Is Resetting Always an Option?

Unfortunately, not all Epson models support manual deactivation of the jig flag. For the ET-2650, reports suggest it is sometimes possible, but many units will require EEPROM replacement regardless.

If you encountered this issue after a firmware update or DIY repair, it’s highly likely the firmware became unstable—prompting this error.

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. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. 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.

Thanks again for contacting us and for being part of the BCH Technologies community. Your dedication to solving these issues helps us continue providing technical support and resources for users like you.