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Normally latest version of ACU firmware is needed, plz follow below steps to upgrade it.
Step 1. Get the up-to-date firmware from KINGSAT or official distributor.
Step 2. Copy the firmware to USB flash disk and ensure it is at root directory;
Step 3. Power off ACU and insert USB to the port on ACU front panel;
Step 4. Press ”BACK” then press “Power”, don’t release buttons until the display is lightened.
Step 5. Press “OK” and wait for upgrade(see below display);
Step 6. Done. System restart.
Part 1 Upgrade BDU
Appendix 2
Upgrade