JVC GY-HM790U Service Manual page 29

5.3.2 Update procedure
(1) While pressing the [MENU] and [FOCUS ASSIST(side)] buttons, turn ON the power. The VERSION menu is displayed immedi-
ately, after the UPGRADE READY was displayed.
UPDATE READY
(2) Insert the SD memory card into the card slot B.
Note:
Can not be updated with slot A.
(3) The updating is started automatically, after the SD memory card was inserted.
Progress bar is displayed on the LCD display while updating.
The AUDIO AUTO LED of CH1 blink slowly and AUTO LED of CH2 is turned off.
LCD display
Updating
Don't Turn Power Off
(4) When the update is completed, audio AUTO LEDs of AUDIO CH-1 and CH-2 blink slowly. It takes about 5 minutes to complete
the update.
Complete is displayed on the LCD display.
LCD display
Complete
(5) After complete the updating, remove the SD memory card. The GY-HM790 reboots automatically.
(6) Turn OFF the power and turn it ON again.
(7) Enter the Service Menu to check the CPU VERSION.
Note :
Confirm the firmware in the SD card if the "update can't be Executed !" was displayed on the LCD display.
(The AUTO LEDs of AUDIO CH1 and CH2 blink alternately, when update can not be executed.)
LCD display
Update can't be Executed !
After few seconds.
Push the set button( ).
...
--- VERSION ---
FIRMWARE SPL V
EXIT
(No.HC034<Rev.001>)1-29