Epson RC90 User Manual page 108

Maintenance 5. Firmware Update
(6) Make sure that the development PC is connected to the Controller with a USB cable
(7) Check the current firmware version and the new firmware version and click the
(8) The firmware upgrade starts. It takes several minutes to complete.
NOTE
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and Click the <Next> button.
<Install> button.
Do not unplug the USB cable during transfer or turn OFF the Controller or the
development PC.
RC90 (EPSON RC+ 7.0) Rev.4