Replacement instruction for CISS chip-set

CISS instruction for Epson WorkForce Epson WF-7620,WF-7610,WF-3640 & WF-3620

Please NOTE: First you must install the original cartridges which comes with the printer before using the CISS.

Please NOTE: After installing the chip-set, please make sure the chip-set is inside the black chip holder and the 4 black small pins are holding the bottom of the chip-set very well and NOT loose. (if so never install it inside the printer and contact us)