For technicians utilizing the Adjustment Program, the following protocols are recommended:
Previous work on Canon and Brother service tools has shown that manufacturers use proprietary USB commands (often based on ESC/P-R for Epson) and encrypted handshakes. Epson’s adjustment utilities are typically leaked by service centers or reverse-engineered from Chinese repair forums. The L6490 runs a custom ARM Cortex-M3 (Epson S1C33 family) with on-chip flash storing the waste counter in EEPROM. Epson L6490 Adjustment Program
While the tool enables repair, many resets are performed by third-party refurbishers who never replace the waste pad, leading to ink leakage and environmental harm. Epson’s official position is that the adjustment program is a "service tool, not a consumer utility." For technicians utilizing the Adjustment Program