Optoma ES526 Service Manual page 51

12. It takes about 8 minutes, the firmware
upgrade process is finished, "Download
completed" will appear on the screen.
- Unplug RS232 cable and power cord.
13. Check FW version.
- Re-plug in power cable, then restart the
unit and get into the Service mode to
check the firmware version.
(To get into Service mode, please press
"Power", "Left", "Left" and "Menu" buttons
sequentially.)
ES526/EX536/EX531/CB2800/ES526L/EX536L Confidential
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