Kenwood TM-281A User Manual - Page 10

DC POWER CABLE CONNECTION Locate the power input connector as close to the transceiver as possible. MOBILE OPERATION The vehicle battery must have a nominal rating of 12 V. Never connect the transceiver to a 24 V battery. Be sure to use a 12 V vehicle battery that has sufficient current capacity. If the current to the transceiver is insufficient, the display may darken during transmission, or transmit output power may drop excessively. 1 Route the DC power cable supplied with the transceiver directly to the vehicle's battery terminals using the shortest path from the transceiver. • If using a noise filter, it should be installed with an insulator to prevent it from touching metal on the vehicle. • We recommend you do not use the cigarette lighter socket as some cigarette lighter sockets introduce an unacceptable voltage drop. • The entire length of the cable must be dressed so it is isolated from heat, moisture, and the engine secondary (high voltage) ignition system/ cables. 2 After the cable is in place, wrap heat-resistant tape around the fuse holder to protect it from moisture and tie down the full run of cable. 3 To prevent the risk of short circuits, disconnect other wiring from the negative (-) battery terminal before connecting the transceiver. 4 Confirm the correct polarity of the connections, then attach the power cable to the battery terminals; red connects to the positive (+) terminal and black connects to the negative (-) terminal. 1 • Use the full length of the cable without cutting off excess even if the cable is longer than required. In particular, never remove the fuse holders from the cable. Red Black Fuse holder 5 Reconnect any wiring removed from the negative terminal. 6 Connect the DC power cable to the transceiver's power supply connector. • Press the connectors firmly together until the locking tab clicks. Fuse holder 3