Situation: When using the A1 source board (E5071-66571/69571) in repairs, Rev A.05.00 or later firmware is required. If customer unit’s firmware version is less than Rev.A.05.00, it should be updated by changing the operating system. With Rev A.03.60 or below version firmware, an error message “Power on test failed (A1 not found)” is shown at lower left part on a display at power on. With Rev A.03.62 or A.04.00 version firmware, any of messages “Power on test failed (A1 DC-bus, 0x00000010)”, “Power on test failed (A1 DC-bus, 0x00000020)”, or “Power on test failed (A1 DC-bus, 0x00000030)” is shown at power on.
To avoid troubling on customers, especially after a system recovery timing, it’s necessary to update the E5070B operating system if customer unit’s firmware is Rev.A.4.00 or below.