Therefore, once we see this error, we will simulate a cartridge-changing event, taking the cartridge out and putting it back. As a result, the printer will be confused and display 'the following cartridge cannot be detected' because the printer will not understand how we have a full-tank without changing the cartridge. Once it reaches depletion, it will roll back to full tank level. The chip will display low ink warnings and then depletion (red cross). Just opposite to the resetter, we cannot control the reset time. Once it reaches the maximum, it rolls back to zero. The chip is rolling a continuous loop of page numbers. At the end, when the cartridge monitor shows depletion (red cross), the reset is not possible anymore.Ģ. Once the ink level is low (with a triangle warning sign), our chance of resetting decreases dramatically. However, we must do this before the ink level drops down to 15 %. Therefore, the reset time is controlled by us (active reset). A resetter is a device that writes 'Page=0' forcefully to the Epson's OEM chip. Traditionally, we have two ways of doing this.ġ. Therefore, our goal is to put the printed page back to zero after a refill, so the printer will read a full tank. This is the reason why many people who refill their cartridges and find the printer still think the cartridge is low on ink or empty.

For example, if a cartridge is able to print 1,000 pages and it has printed 500 pages, then the printer's ink gauge will show that it is half-full. Instead, the printer uses a computer chip on the cartridge to track how many pages have been printed. Contrary to many people's beliefs, an Epson printer can't measure how much is ink left in a cartridge.

Epson 7820 chip resetter