INSTRUCTION MANUAL IC-R8500 Page 37 11 MAINTENANCE CPU resetting If the IC-R8500 is behaving erratically, this may be an indication of a CPU malfunction. In such cases, reset the CPU. While pushing [MW], push [POWER] in to turn on the receiver power. • The CPU is reset. NOTE: Resetting the CPU clears all memory contents and returns internal settings to their factory defaults