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Connect IGM serial port and computer serial port by using
the serial cable.
Run terminal emulator such as the hyper terminal and
switch on the IGM power.
When starting, press ‘c’ on the keyboard to start the
firmware upgrade mode.
Firmware Upgrade Mode is accessible only during the 2-
second initialization process, therefore ‘c’ needs to be
pressed immediately after initialization otherwise it will be
changed automatically to the existing firmware mode.