FM Auto Radio (120-1336) Installation Faxback Doc. # 3847 Converter Turn the AM car radio "on" and tune to approximately 1400 kHz on AM radio dial. Set slide switch on front of FM Converter to "FM" position. Retune the AM radio till you obtain the loudest noise. Adjust TUNING on the FM Converter to the desired station. For drift-free FM reception, set the slide switch to the AFC position. The built-in Automatic Frequency Control circuitry will lock-in on that station and there will be no drifting off-frequency. To use the AM radio, merely set the slide switch on the FM Converter to the AM position. Then use the AM radio as normal. INSTALLING THE FM CONVERTER RADIO Select an attractive underdash location, taking special care that it is convenient for the driver to operate. Avoid areas with wiring, trim or other mounting obstacles. Attach the mounting brackets to the side of the unit with the hardware supplied. Using the mounting brackets as a guide, mark and drill holes in the desired location-taking care not to drill into existing wiring or trim. Fasten the unit in place with the hardware supplied (use either the bolts and nuts or self-tapping screws). Hints Use only with either 12 volt negative or positive ground electrical systems. Use only 1 amp fuse in the fuse holder. If radio does not operate, check to see if power lead is firmly connected and that there is an electrical/mechanical connection from the chassis back to the frame of the vehicle (or that there is a connection through the shield portion of the antenna cables). Refer repairs to qualified service personnel. ELECTRICAL CONNECTIONS ANTENNA CONNECTION: Remove the Antenna Cable from the car AM radio Antenna Jack and connect it to the Converter ANT Jack. Connect the Antenna Extension Cable between the AM radio Antenna Jack and the "TO AM RADIO" jack on the rear of the FM Converter. POLARITY SETTING: Determine the polarity of the electrical system. If the car battery is negative ground, set the Polarity Switch to (-) mark with a screwdriver. If it is positive ground, set the Polarity Switch to (+) mark. CAUTION: If the switch is set incorrectly, the Radio may be damaged. POWER CONNECTION: Connect the Power Cable to the Accessory terminal on the ignition switch of the vehicle. ADJUSTMENT OF OUTPUT FREQUENCY If a strong signal is on or near 1400 kHz on the AM radio, you may encounter many strange noises and "beat" tones. In such a case, you will need to retune the output frequency of the FM Converter. To do this, first find a quiet spot near 1400 kHz on the AM radio dial: then turn the FM Converter "ON" and with a small screwdriver carefully adjust the "Output Frequency Adjustment Core" (from the top of the FM Converter) till you hear a rushing sound in the Radio. Be sure to replace the rubber grommet in the hole in the top of the FM Converter. THE USUAL RANGE of an FM station is approximately 25 to 50 miles (depending on height and location of the FM transmitter antenna). This range will be affected by obstacles such as buildings, hills and the curvature of the earth, which block transmitted FM radio signals. In weak signal areas, the radio may pick up noise from surrounding cars and other electrical devices; it may flutter or even fade completely out. In these cases, use the AM radio only. The converter Radio incorporates an A.F.C. (Automatic Frequency Control) circuit to keep the radio tuned to the station you have selected. However, as you drive away from a station and the signal becomes very weak, it is possible for the AFC circuit to automatically tune to an adjacent, more powerful station. In such a case, set the front panel slide switch to the center "FM" position; you may then be able to pick up the weaker station without interference from the stronger station. Note: If the AM radio has push-button tuning, you'll find it convenient to preset one of the buttons to 1400 kHz. Then, when you want to use the FM converter, just press that push-button and turn the converter on. That way there's no need to retune each time you want to use FM. (br/all-12/28/94)