8 FT-1900E OPERATING MANUALCabin Engine Room FT-1900EBatteryRED: Positive (+)BLACK: Negative (–)13.8V15A FUSE15AMobile Power ConnectionsTo minimize voltage drop and avoid blowing the vehicle’s fuses, connect the supplied DCpower cable directly to the battery terminals. Do not attempt to defeat or bypass the DCcable’s fuse - it is there to protect you, your transceiver, and your vehicle’s electrical system.Warning!Never apply AC power to the power cable of the FT-1900E, nor DC voltage greaterthan 15.8 Volts. When replacing the fuse, only use a Vertex Standard’s 32 V/15 Afuse. Failure to observe these safety precautions will void the Limited Warranty onthis product. Before connecting the transceiver, check the voltage at the battery terminals while rev-ving the engine. If the voltage exceeds 15 Volts, adjust the vehicle’s voltage regulatorbefore proceeding with installation. Connect the RED power cable lead to the POSITIVE (+) battery terminal, and the BLACKpower cable lead to the NEGATIVE (–) terminal. If you need to extend the power cable,use #12 AWG or larger insulated, stranded copper wire. Solder the splice connectionscarefully, and wrap the connections thoroughly with insulating electrical tape. Before connecting the cable to the transceiver, verify the voltage and polarity of thevoltage at the transceiver end of the DC cable using a DC voltmeter. Now connect thetransceiver to the DC cable.INSTALLATIONMobile SpeakersThe optional MLS-100 External Speaker includes its own swivel-type mounting bracket,and is available from your Yaesu dealer.Other external speakers may be used with the FT-1900E, if they present the specified 4-Ohmimpedance and are capable of handling the 3 Watts of audio output supplied by the FT-1900E.MOBILE I NSTALLATIONWARNING!· Never remove the FUSE holders from the DC cable.· Use only a Vertex Standard’s 32 V/15 A fuse.