'USB not recognized' resolution.
As a quick followup, the fact that my notebook PC did not recognize
the TNC-X when it was installed was due to soldering issues.
When those issues were solved, the TNC was recognized and software
installed normally. However, the PC immediately stopped operation with
a severe error message and memory dump. The solution to that was what
Mr. Hansen suggested, troubleshooting the RS-232 chain as described in
the manual. Another soldering issue was found, and now things seem to
be working well.
All tests have now been passed, and I'm now begining to create a new
cable for the Yeasu to TNC-X units. I am also going to document the
troubleshooting test points, with expected results, and hope to post
that information on the Yahoo site early in the new year. It may help
someone else who has a similar problem.
Thanks to everyone who responded to my original posting.
VE3GIH Gord Hewit
--- In email@example.com, "VE3GIH Gord" <gordon.hewit@...> wrote:
> My newly built TNC-X is not recognized by my PC. It did pass the
> tests, before I put the IC's in place.
> While I'm likely the cause of this problem, I'd like to ask one
> question. Is there supposed to be a USB IC underneath U7? If there
> isn't, I'll get the magnifying glass out and start checking for cold
> solder joints.
> VE3GIH Gord Hewit