How do you reset the MMSI programming for an ICOM 504 Marine radio?

SOURCE: icom m402

you may have poor connections on you LCD screen leads. I would first determine if the blinking is being caused by a loose connection or by something happening within the CB circuitry. The best way to do this would be to try to push and hold the LCD screen to stop the blinking if this works then your trouble is a loose connection. If it does not work then you may have some kind of internal problem. One such problem would the the IC driving the LCD screen you will need to have a schematic to troubleshoot this. The schematic will show you the voltage readings that should be on the pins of the LCD driver IC, and by measuring the voltages you should be able to determine which components are defective. You may also want to use a logic probe if the schematic contains a truth table of the states the pins sould be in under test conditions.

SOURCE: Handheld Marine Radio

This applies to all battery powered radios. Take out the battery and measure the voltage to see if it is indeed charged. If it's not, then the fault is the charger or the battery or both. If the battery voltage shows that it is fully charged, then clean the terminals on the battery and on the radio with a pencil eraser to remove any corrosion. If still no joy, then look up in your user's manual on how to do a reset. If you don't have a manual, get on the ICOM website and download one.

Good luck.

SOURCE: no chann. 70 on Uniden 525 marine radio

You can't "select" channel 70, nor can you talk on channel 70. Channel 70 is reserved for the exchange of digital data between radios.

And it is not possible to address an "emergency" (do you mean distress? or urgency?) message to an individual recipient.

Your radio is not allowing you to do any of these things because it has been (correctly) programmed to discourage you from doing things that would be illegal.

If you set up a routine call with your friend (or anyone else), you should find that once the two radios have completed their (almost instantaneous) exchange on Channel 70, they will both switch to whichever working channel you had selected, and he will get a beeping sound to tell him that there is an incoming call.

Sounds to me like both radios are doing exactly what they are supposed to.

SOURCE: I have an ICOM-504 . I can transmit but I can not

Hello,

I had the same problem and traced it to a bad connection between flex cables and boards.It seems the SQL signal from the Rx board is not reaching the processor on the front panel. Check all connections (reseat all cables) and try again.

servstan

SOURCE: how to reset mmsi number Raymarine 215

This secret code is for the Raytheon / Raymarine RAY 220 VHF. It may work on other Raytheon/Raymarine radios also.

Here you go:

With the Power OFF, Press and HOLD the FUNC, 16/9 and DSC keys while you power ON. Do not release the keys until you hear the audio BEEP which means your done. Then reprogam your NMSI number as per the manual. Pretty easy, hey?