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LC-65D90U
How to upgrade the software
1 Shut off the AC power (i.e. unplug the AC cord).
2 Insert the SD card for version upgrade (prepared as above) into the service socket located below left of the
right-side cooling fan in the rear of the unit, in a way that the cut corner of the SD card comes at the right-
hand side.
Note: If the SD card is inserted in a wrong way, the card will go deep inside the unit beyond retrieval.
Take due care to insert the SD card correctly.
3 While depressing the "SYSTEM RESET" button located below the RS-232C connector in the rear left side
of the unit, plug in the AC cord.
Note: While depressing the "SYSTEM RESET" button located in the rear left side of the unit, turn on the AC
power (i.e. plug in the AC cord).
Note: After the unit is started, you may release the "SYSTEM RESET" button.
4 After the unit startup, the system upgrade screen as shown below appears within 20-40 seconds.
5 Even a single failure in the process will trigger the upgrade failure screen as shown below. The word NG
changes to red for the item failed.
Note: In the event of a failure, repeat the upgrading process. If the process repeatedly fails, it is likely that the
hardware is troubled.
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