20 Most Recent Icom IC-M505 - VHF/DSC Marine Transciever - Page 2 Questions & Answers

it is available on web sight..download it.

Icom Radio... | Answered on May 21, 2019

Contact Icom directly to inquire.

Icom Radio... | Answered on May 20, 2019

Contact iCOM directly to inquire.

Icom Radio... | Answered on May 17, 2019

Sure sounds like a "low volts" reboot due to high current draw.
Are you measuring voltage at the radio itself, after any connector, fuse or circuit breaker? The voltage (at the set) should be slightly different between low and medium power tx. Use a good meter to confirm this. Is the power supply able to supply the current required at high tx power? Is a current limiter operating? A lead-acid battery in parallel with the PSU might be needed at high power.
At high power setting the radio will probably reset faster than a low power input voltage can be measured with a normal meter, so an oscilloscope might be needed to see the power input voltage as it happens (might be very brief).
Could RF be getting back into the power supply? Does it happen on both bands? Is the SWR good? Is the earth good? How long and how thick are the power wires? Is there any filter on the power supply wires (close to the radio)? If it's new there will be a warranty if it's a fault in the unit. Good luck :)

Icom Radio... | Answered on Apr 28, 2019

Que es el error? Aye un numero? Diga mas acerca de este problema.

Icom Radio... | Answered on Apr 08, 2019


Icom Radio... | Answered on Mar 25, 2019

You've probably already found the answer to this question but doing a search for D104 wiring to ICOM will show you what you need. If the connector is the 8 pin circular one, then the PTT and MIC connections are the same for all ICOM radios.

mic wiring d104-fo0tt3cfp45qqpkmnfdugzjn-1-0.png

Icom Radio... | Answered on Jan 12, 2019

I would check the charger contacts and make sure that they are actually touching the battery contacts. Also, if the battery is shot, the charger may not recognize that there is a battery in it!

You might want to try cleaning all of the battery contacts and the contacts in the radio. These often get corroded and can cause problems.

Icom Radio... | Answered on Jan 12, 2019

If the dial actually shows the 40M frequency, then the likely hood of the PLL not functioning is slim. My guess is that the band pass filter for 40M has a bad relay or steering diode in it. This happens more often than not and is a rather inexpensive repair. I have the same problem in my IC-706, except 20M is affected.

Icom Radio... | Answered on Jan 12, 2019

Have you checked your settings on your receiver to see if they match the repeater you can't receive? CTCSS, DCS, and the digital radio settings can all affect this.

Icom Radio... | Answered on Jan 12, 2019

I take it that you are sharing your ICOM's antenna with other equipment. It would also help to know what ICOM you are using. However, it could well be that the multiplexer is preventing the GPS signal from getting to the radio. This is assuming that the GPS receiver actually uses the external antenna. Also, if the radio is in the basement and the GPS antenna is internal to the radio, you may not have enough signal getting to the receiver.

Icom Radio... | Answered on Jan 12, 2019

Yes, it can be. Check out MODS.DK and there will be information in there as to how to do it. Go to the MODS section, then ICOM, and you will find it in there.

Icom Radio... | Answered on Jan 12, 2019

Try finding some older or newer software for the radio. Icom, Kenwood, Yaesu and Motorola are constantly updating their software and it is not always compatible with older models. Often the serial number range that the software will work with is in the documentation.

We see this problem all the time at work. We have several different computers with different versions of software on them so that we can continue to support our older customers, and still work with the newer radios.

I have heard that Motorola has decided to stop supporting radios after being released for 5 years. In fact, the software will expire and will not work again. The new Motorola software goes to their website to make sure that it is licensed before it can be used, each and every time. It basically means if your radio dies after 5 years, you won't be able to change anything in it. I am sure other manufacturers will follow this trend if this actually happens.

Icom Radio... | Answered on Jan 12, 2019

If you can do a master reset, then the radio should be able to be programmed. Unfortunately, it is possible to BRICK a radio by doing something wrong when in the process of loading info into it from a computer. Bricking a radio basically means that the radio is useless. You may have to send it to ICOM and see if they can get it operational.

I don't recommend that anyone updates the firmware in anything unless there is a real need for it. The chances of making the item completely useless when doing this is real. There are a lot of bricked radios on EBAY or being used as door stops because of this.

Icom Radio... | Answered on Jan 12, 2019

I am certainly not an expert on such things but from your description it seems like a modulation issue as the carrier is reaching the repeater.

Lack of modulation could be a microphone problem or a matter of the audio gain needing to be adjusted or it could be a modulation amplifier fault.

I notice the radio has a very comprehensive battery of tools and facilities. Among these is a scope and I am guessing the scope is there as an aid to adjusting and checking the modulation envelope.

I suggest some light reading and experimentation...
Good luck!

Icom Radio... | Answered on Nov 11, 2018

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