[Elecraft] KIO2 sends out to pc but doesn't take commands from pc

[james1787 at aol.com]

Hi Don,

Thanks for the reply and your help! Yep, I have checked the resistances 
on both the tiny inductors. They are around 8 ohms, which was within 
the range that elecraft support suggested. Elecraft support suggested 
that U1 pin 11 and pin 12 should be around 5 volts when no data is 
being sent.. well, pin 11 is 0 volts and pin 12 is 5 volts. I traced 
this all the way back to U6 pin 25 and pin 26. Pin 25 was 5 volts and 
pin 26 was 0 volts. I'm not sure where to head next with this. Perhaps 
U6 is bad? That is what it's looking like..

Thanks & 73,

James KB2FCV

-----Original Message-----
From: w3fpr at earthlink.net
To: james1787 at aol.com; elecraft at mailman.qth.net
Cc: support at elecraft.com
Sent: Fri, 27 Oct 2006 7:23 PM
Subject: RE: [Elecraft] KIO2 sends out to pc but doesn't take commands 
from pc

James,

Have you checked the resistance across the tiny inductors on the KIO2 
board?
Those inductors are easily damaged when installing, and an open inductor
would cause exactly the symptoms you report.
RXD and TXD are separate signals, so it is quite possible that TXD is
working, but RXD is not - resulting on 'one-way' communications.

73,
Don W3FPR


> -----Original Message-----
>
> I have been working with the KIO2 for a while to try to get it to 
work.
> It's never really worked since I put it in.
>
> Today I verified with another PC that the K2 does indeed send data
> through the KIO2 but it does not receive. I ran the test as described
> on page 14 of the KIO2 manual. Steps 1,2,3,4 works fine I get the
> FA0xxxxxxxx; to come up in hyperterminal when I hit the DISPLAY button
> as instructed. When I try step 5, which is to type SW01; then nothing
> happens. The software I tried cannot connect to the K2 either.
>
> The settings on my serial port (COM1) in Device manager (windows 2003
> production) are as follows:
> Bits Per Second: 4800
> Data Bits: 8
> Parity: None
> Stop Bits: 2
> Flow Control: None
>
> I am still baffled by what would cause one way communication, but not
> two way communication between the K2 and the PC.
>
> 73,
>
> James KB2FCV
>


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