5411OTHER FUNCTIONS‘‘ CPU resetThe function display may occasionally display erroneous informa-tion (e.g. when first applying power). This may be caused by exter-nally by static electricity or other factors.If this problem occurs, turn power OFF. After waiting a few seconds,turn power ON again. If the problem persists, perform CPU reset-ting operation as following procedure.• Turn power on while [SQL] and [D•CLR] arepushed.CAUTION:Resetting the CPU returns to all programmedcontents to their default settings.AT POWER ON5311 OTHER FUNCTIONSDD Mic simple modeThis item turns the microphone simple modeON and OFF. Microphone simple mode isused to change the function assignments forkeys in the optional HM-75A REMOTE-CONTROLSPEAKER - MICROPHONE as below. This assign-ment is convenient for 3-channel use of sim-ple operation.• mIC.N1 : Normal 1 (default)• mIC.N2 : Normal 2• mIC.Sm : Simple modeNOTE:Turn power OFF when connecting the HM-75A to the trans-ceiver.VFO mode cannot be selected via the microphone when SIM-PLE mode is selected.Optional HM-75A requiredMRF TXMRF TXHM-75A Mode NORMAL1 NORMAL2 SIMPLEkey[A] Freq. [B•CALL] [SQL] [SQL]CH Null[B] Freq. VFO/Memory VFO/Memory [B•CALL]CH Null Null[∫] Freq. Freq. Up Freq. Up MR-00CHCH Memory CH Up Memory CH Up[√] Freq. Freq. Down Freq. Down MR-01CHCH Memory CH Down Memory CH Down