Why lock Epson DX5 printhead
In fact, Epson head on the domestic market is mostly removed from Epson desktop printers or bought from Epson’s dealers. And in the year of 2012, To protect Epson own printer sales, Epson added an encryption code into the DX5 memory board to prevent it from being used by domestic printer brands and models. But locked printheads cause printing errors frequently, failing to print at all. Still, these unusable printheads are sold by unscrupulous manufacturers on the market.
Unlocked Epson DX5 printhead
Several months later, an enterprising engineer developed a memory card that removed the code and unlocked the printhead, making it usable again. They are referring to as ‘first time locked’ heads.
However, Epson found ways to lock Epson DX5 printhead again, and that is ‘second time locked’.
That is the reason for both locked and unlocked DX5 printheads on the market.