[aprssig] Kenwood D700 KISS lockup

Andrew Rich vk4tec at tech-software.net
Thu Jan 26 13:14:18 EST 2006

I found a PM reset did it once

Andrew Rich
Amateur radio callsign VK4TEC
email: vk4tec at tech-software.net <mailto:vk4tec at tech-software.net>
web: http://www.tech-software.net

-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of David Flood
Sent: Friday, 27 January 2006 4:10 AM
To: ron.stordahl at digikey.com; 'TAPR APRS Mailing List'
Subject: RE: [aprssig] Kenwood D700 KISS lockup

If you are referring to the D700 getting stuck on "Opening TNC" when you
switch back to internal APRS after using an external program, then the
answer is NO.

There's a bug in the aux port code that hangs the TNC.  You either have to
do a VFO reset or connect a computer and execute some commands.  See below
your message for the commands courtesy of a couple of members of the TMD700A
yahoo group.


-----Original Message-----
From: aprssig-bounces at lists.tapr.org [mailto:aprssig-bounces at lists.tapr.org]
On Behalf Of Ron Stordahl
Sent: Thursday, January 26, 2006 9:45 AM

When the Kenwood D700 locks up while being used in KISS mode, is a power
down/up sufficient to bring it back to life?

A Possible Fix:

-----Original Message-----
From: Dennis Hudson [mailto:n2lbt at n2lbt.com]
Sent: Sunday, June 08, 2003 6:27 AM
To: TMD700A at yahoogroups.com
Subject: Re: [TMD700A] "Opening TNC" Fix without reset

I can confirm that the problem is GPS communication related. I recently
switched from a moded Tripmate to a Motorola Nextel i88 for my gps. The
phone GPS stream can do weird stuff while it is in the cradle while the
D700 is in APRS mode. Once a week it will hang the D700 into the
"Opening TNC" routine. I will have to try resetting the TNC via the
serial port, but in the mean time I'll just reset the PM which doesn't
nearly piss me off as much as doing the hard reset.

Dennis, N2LBT

On Saturday, Jun 7, 2003, at 23:31 America/New_York, Randy Mclean wrote:

> Here is a simple fix for the "Opening TNC" hang up without doing a
> reset. I tracked the problem down to the GPS feature. I found I could
> duplicate the problem if it was on and you break the computer serial
> connection while its sending gps data. You will lock up the next time
> you switch back to APRS mode.  You can send the following commands in
> a terminal session to unlock it.
> Open Hyperterm at 9600,8,1,n
> type "TC 1" this means Terminal control on
> Now type "GU 0" This turns the GPS option off
> Now type "TNC 2" this puts the radio in "PKT" or packet mode
> Wait until "Opening TNC" goes away
> Now type "TNC 1" this puts the radio back in APRS mode
> Wait until "Opening TNC" Goes away
> Now type "GU 1" or "GU 2" 1 is 4800 NEMA while 2 is 9600 NEMA
> Finally type "TC 0" to take the radio out of terminal control

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