Question about Icom IC-M505 - VHF/DSC Marine Transciever
Radio transmits fine but receives only when other radio is in close proximity
Posted by Anonymous on
Turn the squelch down? the RF gain down too
do you have an attenuator turned on ?
Posted on Feb 11, 2015
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Posted on Jan 02, 2017
The manual for this radio (in Adobe .pdf format) is available for download directly from Icom America, free of charges.
Since the "AquaQuake" function works and you do hear static when the squelch is off, that is sufficient to let us know that the voice coil of the speaker is functional and should produce sounds with the right signal applied.
The first thing to determine is if you're close enough to another operating transmitter for the radio to receive a signal. One of the 10 weather channels the radio is capable of tuning should be close enough produce some intelligible audio from the speaker - assuming the squelch setting isn't set too high.
If a WX channel works, then you'll need to see if there's a VHF Marine band transmitter operating nearby. You might need to set another Marine band radio receiver up to verify that there is indeed a signal present on the particular Marine band channel that you're monitoring. A list of frequencies is published on pg 27 (of the manual linked above) in case you need to convert between channel and frequency to tune on a non-channelized radio.
Outside of that, there's little the end user can do without specialized test equipment, schematics and of course, training. Many shops will be happy to provide an estimate for repair when provided with a small bench diagnostic fee. This fee is usually applied towards an authorized repair by most reputable repair shops.
I hope this helps & good luck!
Posted on Nov 27, 2012
Testimonial: "Thanks for providing the additional troubleshooting tips and the link to the manual. "
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