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

[James1787]

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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[Don Wilhelm-3]

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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[James1787]

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: [hidden email]
To: [hidden email]; [hidden email]
Cc: [hidden email]
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
>

________________________________________________________________________
Check out the new AOL.  Most comprehensive set of free safety and
security tools, free access to millions of high-quality videos from
across the web, free AOL Mail and more.

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
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Elecraft web page: http://www.elecraft.com