How to turn on Furuno FM-4800 Cordless Telephone?
If your Furuno Cordless Telephone isn't turning on, first ensure the 10.8 to 15.6 VDC battery connections are secure and the fuse is intact. If both are fine, long press the On/Off key to power on the radio. The issue might be due to no DC voltage reaching the radio or a blown fuse.
What to do if my Furuno FM-4800 position is not displayed?
If your Furuno Cordless Telephone isn't displaying your position, check the NMEA2000 or NMEA0183 cable connection. If the cables are connected, ensure their output is valid. If not connected, verify that the internal GNSS module is enabled and that nothing is blocking the top of the radio unit. The problem may stem from the accessory cable or the settings of the GNSS receiver.
Why does my Furuno FM-4800 blow the fuse?
If your Furuno Cordless Telephone is blowing fuses, ensure the red wire connects to the positive (+) battery post and the black wire to the negative (-) post. Then, inspect the power cable for DC voltage and replace the fuse (8A 250V). This issue is likely due to reversed polarity of the power wires.
What does the icon on my Furuno FM-4800 mean?
If you see the icon on your Furuno Cordless Telephone's home screen, it means the power supply voltage is either too high or too low. Make sure the connected power supply voltage is within the range of 10.8 to 15.6 VDC.
How to stop speaker noise in Furuno Cordless Telephone?
To reduce popping or whining noise from the speaker of your Furuno Cordless Telephone when the ship's engine is running: 1. Reroute the radio's DC power cable away from the engine. 2. Add a noise suppressor to the power cable. 3. Consider using resistive spark plug wires and/or adding an alternator whine filter. This noise is likely due to engine interference.
Why is Furuno FM-4800 Cordless Telephone transmission power low?
If your Furuno Cordless Telephone transmissions are always on low power, even when high power is selected, check the antenna or test the radio with another antenna. The issue is likely related to the antenna.
What to do if no sound from Furuno Cordless Telephone speaker?
If no sound is coming from the internal or external speaker of your Furuno Cordless Telephone, check that the external speaker cable (Purple & Gray) is physically connected and that it is not broken or short-circuited. The problem is likely related to the accessory cable.
What does PLL UNLOCK mean on my Furuno FM-4800?
If your Furuno Cordless Telephone displays "PLL UNLOCK", try restarting the radio. If the problem persists, please consult your dealer. This indicates an issue with the phase lock loop.
What to do if the Furuno FM-4800 Cordless Telephone radio cannot be turned on?
If the Furuno Cordless Telephone radio cannot be turned on, it may be due to no DC voltage or a blown fuse. First, check the 10.8 to 15.6 VDC battery connections and the fuse. Then, long press the On/Off key to turn on the radio.
Why does my Furuno FM-4800 Cordless Telephone radio blow the fuse when connected to the power supply?
The fuse may blow because of reversed polarity of the power wires. Ensure the red wire connects to the positive (+) battery post and the black wire to the negative (-) post. Also, check the power cable for DC voltage and replace the fuse (8A 250V).
General| Brand | Furuno |
|---|---|
| Model | FM-4800 |
| Category | Cordless Telephone |
| Language | English |
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