The Epson L3250 is a "chipless" printer in terms of standard ink tanks, but it have a firmware-level waste ink counter. When the counter reaches 100%, the printer's motherboard forces a "Service Required" error, locking out all printing functions.
: The pads are usually located at the back or bottom of the printer, secured by a single screw. 3. Alternatives epson l3250 waste ink pad resetter