Why is there no sound from the Furuno FS-1503 loudspeaker?
If there's no sound, check a few things: make sure the [ /4] key is on, adjust the [VOLUME] control, and if "SQ" is on the display, press the [SQL/5] key to disable the squelch. Also, ensure the [RF GAIN] control is turned clockwise.
What to do if the Furuno FS-1503 Telephone output power is reduced?
If the output power is low and the “LOW” indication blinks, the power is automatically reduced to protect against overheating. Wait for the unit to return to normal. Also, check if the fan is working properly.
How to fix poor articulation on Furuno Telephone?
To improve articulation, ensure you're using the correct class of emission for the incoming signal. For example, H3E should only be used on 2182 kHz. If using Custom or ITU channel mode, press the [CLARI/3] key and fine-tune the frequency using the FREQ/CH control. Also, check if the receiver is detuned.
What to do if the Furuno Telephone antenna coupler can’t tune the antenna?
If the antenna coupler can't tune the antenna, check the antenna connection to ensure it is neither disconnected nor shorted. The recommended antenna length is 6 to 15 meters. Verify the coupler ground and check the connection cable.
What to do if Furuno FS-1503 key input is not accepted?
If key input is not accepted, it might be because the FS-1503 is under the control of external equipment. If "REM" appears, suspend operation of the external equipment.
Why frequency readout appears but no lamps light on Furuno Telephone?
If the frequency readout appears but no lamps light, the [ /9] key may be off. Try pressing the [ /9] key.
How to tune in a broadcast station on Furuno FS-1503?
To tune in a broadcast station, for example, 9640 kHz, press [RX], [9], [6], [4], [0], [0], [ENT]. Ensure you include the last [0]; otherwise, you will set 964.0 kHz. Also, select H3E for the mode. If the frequency is less than 1.6 MHz, ensure ANT FIL is set to 0.1 to 30 MHz (Set in PA/FIL).
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