F1 Fuse (also labeled F2, F3, F203, and similar) for Epson Mainboards – Fix Error 0x9A or 031006 on WF-7720, WF-7710, WF-3640, XP-15000, and more.

There are too many variations of this fuse to list. It may be labeled F2, F3, F201, F301, or another Fxxx identifier. This listing is NOT for the ET-8550, ET-8500, or the L1800/R1390.

If the component on your board is marked with an “F” and is extremely small, this is the type of fuse you’re looking for. If your printer is displaying 0x9A or 031006, there is a strong likelihood that you have a blown printhead and possibly a burnt FFC cable as well.

Please be aware that this fuse is very tiny. We highly recommend that only trained professionals attempt this repair. We provide detailed photos, drawings, and videos to show the exact size of this component. If you are not comfortable performing precision soldering, please do not purchase this part. If you need assistance, consider asking neighbors with technical skills or searching “Makers around me” on Google. Most areas have Makerspaces or independent makers who can help with soldering.

Your order will arrive in an anti-static bag containing a small white envelope, and inside that envelope is the fuse itself—even smaller than you might expect.

If you are having trouble locating the F1 fuse on your Epson mainboard, you’re not alone. Remember that this fuse does not control whether the mainboard powers on. If the board will not power up at all, the more likely cause is blown transistors. Please see our video on diagnosing and replacing the MOSFET/transistor section. Replacement parts are shown below (click).

When the F fuse is blown, the printer often powers on but prints blank pages. (A clogged printhead can cause similar symptoms, so check both.) Use a multimeter to confirm fuse continuity. Many printers with a blown fuse will begin the startup sequence, stop halfway through, and then display 0x9A or 031006.

Fuse locations and markings vary by model. Some mainboards clearly label them as F1, F2, or F3. Examples include:

• F1 fuse on CD86 MAIN – Epson ET-2650

• F201 / F301 on several newer models

• F1 fuse on CD77 MAIN – Epson WF-2750

• F2 / F3 fuses on CD36 MAIN – Epson WF-7720 / WF-7710 (F1 is on the reverse side)

• F1 fuse on CC97 MAIN – WF-7610 / WF-7620

How to replace: The demonstration video shows an ET-8550, but this listing is NOT for the ET-8550. The video is provided only to demonstrate the general process of removing and installing the fuse.