Optoma EX785 Service Manual page 71

Delta Elec. Inc.
Step 8: According to the Flash technology, the old firmware will be erased first.
Therefore, Flash-Tool will automatically erase the old firmware before upgrading.
Caution:
DO NOT install any USB driver when erasing or upgrading process started.
Step 9: After old firmware erased, the new firmware upgrading process will start.
Company Confidential
71
EX785_ EW775
Erasing status
Optoma___________________
Upgrading new firmware
Delta________________
2010/01/05