Instructions are simple:
This is a CPU upgrade. Please check the radio’s boot loader version “uP Boot Ver:F1.n” by pressing “PGM” (PSR-500) or “PROG” (PSR-600) before turning on the radio’s power switch. The exe file required to successfully upgrade the radio depends on the radio’s boot loader version. For example, if your radio displays “uP Boot Ver:F1.0” then please use the upgrader file named “CPU500600BootF10F11_U17.exe”. If your radio displays “uP Boot Ver:F1.3” then please use the
upgrader file named “CPU500600BootF14_U17.exe”. If you use the incorrect upgrade exe application, your radio will not be harmed, but the upgrade will not complete successfully.