How to Identify and Order the Correct WiFi Board for the Epson ET-3850 EcoTank Printer

Question:
I have an Epson ET-3850 EcoTank Printer/Scanner with WiFi that I purchased about three years ago. The printer's WiFi board has failed, and I want to replace it. I've seen the board labeled as J26H006, but there's confusion because some listings show 4-pin or 5-pin versions, and the connectors can be either vertical or horizontal. I don't want to take the printer apart before ordering. Can you tell me which WiFi board part number I need and whether it's a 4-pin or 5-pin, vertical or horizontal connection?
https://www.youtube.com/watch?v=AOZWZ1Ny3Lw&lc=Ugz9UeguOig2jmGp4A94AaABAg

Answer:

Now, regarding your Epson ET-3850: the WiFi board identification can indeed be tricky because Epson often uses the same base board number (like J26H006) across multiple models, but with variations in connector type and orientation. These variations-4-pin vs. 5-pin, and vertical vs. horizontal-depend on how the printer's internal layout is designed and on the specific production batch.

Here's a step-by-step approach to accurately identify the correct WiFi board for your printer:

1. Locate the WiFi Board Model Number:
   If possible, open the printer's rear or side panel just enough to visually inspect the WiFi module. The model number is typically printed directly on the metal shield of the board (e.g., J26H006). Take note of the full code, as there may be a suffix or additional labeling that identifies the exact variant.

2. Identify the Connector Type:

   • A 4-pin connector usually supports basic communication lines and is less common in the ET series.

   • A 5-pin connector provides additional grounding or data lines, more typical for WiFi modules in EcoTank models like the ET-3850.

   • The orientation-vertical or horizontal-refers to how the cable plugs into the module relative to the board surface.

     • Vertical connectors have the cable plugging in straight down or up from the board.

     • Horizontal connectors have the cable inserted parallel to the board's surface.

3. Why Visual Confirmation Matters:
   Unfortunately, Epson's documentation and third-party parts catalogs often list multiple configurations under the same board ID. For this reason, it's not possible to confirm the correct board type without visual verification. The safest way is to check your printer physically before ordering.

4. Finding the Replacement:
   Once you've confirmed the connection type, search for the part on BCH Technologies (https://bchtechnologies.com) or other reputable sources using keywords like "Epson ET-3850 WiFi board J26H006 5-pin vertical." Be sure the product listing's photos match the orientation and connector style of your current board.

5. Alternative Approach:
   If you're unable to inspect the board, you could search for a service manual for the ET-3850, which sometimes includes board orientation diagrams. However, in practice, most ET-3850 printers use a 5-pin vertical configuration, but it's still recommended to verify physically to avoid receiving an incompatible part.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. Therefore, we're unable 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, and it might take a few weeks before your printer can be dropped off. Our services cover both complete printer repairs and part-level diagnostics, with clear instructions on how to proceed. While our rates may not be the lowest, we encourage users to explore self-help methods through online resources. You can start by visiting our YouTube channel (https://youtube.com/@bchtechnologies) and use the search icon next to "About" to find videos on your printer model or part type. YouTube may also suggest related videos from other experts that could assist you further.

Thank you again for reaching out and for your trust in BCH Technologies. Your engagement inspires us to keep producing accurate, detailed, and practical repair guidance for printer owners everywhere.