My last post was about my new Icom RC-28 external VFO that I purchased for my 65th birthday. At the time I had not connected it to the radio as I was busy with some home renovations. Once I could sit down and give the new RC-28 a spin I connected it to the front USB port on my Icom 7610 radio. I was very pleased to see that it worked without any issues....so I thought. When I powered down the radio that was when things went south. The Icom 7610 was stuck in power-down mode. I tried to tap the power button and then hold the power button but this did not shut the radio down. I had to turn off the power supply to the radio to finally power-down the radio.
I thought maybe it was a one-off and I powered the radio on again without issue and then attempted to turn it off. Once again the radio was stuck in power-down mode, so I turned the power supply off. Just to make sure it was not a radio issue that happened to show itself at the same time as I plugged in the RC-28 I removed the RC-28 from the Icom USB port. Without the RC-28 connected the radio powered up and powered down without issue, I was hoping there was not an issue with the new RC-28. There is an Icom 7610 group on Groups.IO that I am a member of so I searched there regarding this power-down issue. One suggestion was to make sure my RC-28 has the latest software update. Up to that point, I did not know you could update its software. I downloaded from Icom the latest RC-28 software and connected my RC-28 to my PC USB port and ran the software. I was told I was running the latest software. Next was to make sure the Icom 7610 rig was updated with the latest software. Now this I know for sure is not the case, version 1.42 is mainly a pre-distortion update. Also known as DPD used for SSB and not CW and being I am 100% CW I felt it was a download that was not needed. Now having said that on Icom's update page, it did indicate there were a few minor fixes. In my opinion, my radio was working and I did not see any need for any minor fixes...well until now.
I downloaded and loaded the latest Icom firmware and it made no difference the radio was still not turning off. Another suggestion from the group was to remove the LAN cable from the rear of the radio. Now for me to remove anything from the rear of the radio is a big undertaking. But it did get me thinking about removing cables so I tried removing the key and headphones from the radio but with the same results failing to shut down. I was thinking for the time being I may have to unplug the RC-28 before turning off the radio as when I did this the Icom 7610 shut down without issue.
As I was plugging my Key back into the front of the radio I noticed a very small device plugged into the other USB port on the radio. It was a Logitech Unifying receiver for my mouse, this allowed me to click on the waterfall of the Icom 7610. I used a wireless mouse as it presented less clutter on the desktop but truth be told I rarely used it. I removed this device and ran a start/shut down again with the radio and low and behold all was fine.
Problem solved and I must admit I was relieved to have finally found what the issue was. I posted my results on the Icom 7610 Groups.io site. I was informed that on such and such a page in the manual it does say the USB ports do not support wireless receivers. I had no issue with the wireless mouse but once the RC-28 was introduced so was an issue.