X Research source In this case, see the Using a Paperclip method. ![]() ![]() If you don't see a cluster of pinholes, look for a small green microchip somewhere on the cartridge-it will either have one single pinhole just above or below it, or two round metal contacts at the top or bottom.Compare a picture of the pins on the reset tool to the number and arrangement of pinholes on the bottom of your print cartridge before purchasing. Most cartridges have either 7 or 9 pinholes in a cluster.To find the right chip reset tool, search the web for "Epson cartridge chip reset tool" along with the exact model of your printer (e.g., WT-7620). Different models' cartridges have different numbers and arrangements of pin holes. ![]() The pins on the reset tool must line up with your cartridge's holes, which are on the bottom or side edge. A cartridge reset tool is a plastic device with pins that, when inserted into the pinholes on your cartridge, reset the chip inside.
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