[ICOM] CIV port on IC7000

[Ekki Plicht (DF4OR)]

On Tuesday 13 May 2008, Dave Shirk wrote:
> Hello folks. I had a UDB to Serial convertor that went bad, which in
> turn caused my Icom CT-17 CIV convertor to go bad, which has also
> messed up the CIV port on my Icom IC7000. I can send simple commands
> to it (frequency and mode, ones with no response) and they work all of
> the time. Commands with replies, work sometimes but not always. Also,
> I get no radio generated output, whether command responses, or radio
> changes (like spinning the tuning knob).
>
> I have not taken the radio apart yet, but looking at the schematics,
> it appears that the problem could be Q1101 on the Logic Board. Does
> anyone have any experience with this problem?

Hook up a simple multimeter to the CI-V connector of your radio, a digital 
multimeter will do fine. Don't connect anything else to the CI-V port. Now 
measure the voltage when idle, you should read something around 5V.
Then constantly spin the tuning knob, now you should see something around 2V. 
If so, the CI_V is most likely working correctly.

I have never heard of a fried CI-V port which went belly up due to a broken 
USB converter. 

73,
Ekki, DF4OR