[wxsig] T238+ Modem Problems

[wn0x at earthlink.net]

Will,

I think it is actually the "In memory of" screen that it gets stuck on.  I'll check the areas that you mentioned and see what I can come up with.

I have not noticed that the busy light is on, but the modem is not connected to a radio yet.  I checked the LEDs with the shorting method described in the checkout section of the construction manual and they worked fine.

I will follow your suggestions and let  you know.

Thanks,

Rich



-----Original Message-----
>From: Will Beals <will at beals5.com>
>Sent: Dec 11, 2006 4:35 PM
>To: 'TAPR Weather Station SIG Mailing List' <wxsig at lists.tapr.org>
>Subject: RE: [wxsig] T238+ Modem Problems
>
>Rich:
>
>By intro screen do you mean the copyright screen or the "one moment please"
>screen?
>
>I am guessing the latter as it sounds like the T238 thinks the channel is
>busy and waiting for it to clear before sending its "Hi, I'm here" packet
>that broadcasts the SW version number.
>
>Is the busy LED lit? (suspect not or you'd have noticed)
>Any chance of a wiring error there.  It is pin 6 of the connector, but best
>place is pin 11 of the micro.  It should be low.
>
>Final wiring to check is the path from pin 14 of the MX-614 through pin 11
>of the header to pin 22 of the micro.  This is the handshaking line for bit
>transfers between the MX-614 and the micro.  If busted, it would halt
>communications which is also symptomatic of your hangup.
>
>Good luck, let us know what happens.
>
>will 
>
>-----Original Message-----
>From: wxsig-bounces at lists.tapr.org [mailto:wxsig-bounces at lists.tapr.org] On
>Behalf Of wn0x at earthlink.net
>Sent: Monday, December 11, 2006 2:36 PM
>To: wxsig at lists.tapr.org
>Subject: [wxsig] T238+ Modem Problems
>
>I am looking for suggestions to help troubleshoot my T238+modem.  
>
>The T283+ works fine without the modem installed.  When I have the modem
>installed and selected for output the T238 gets stuck on the intro screen.
>Changing the output to PEET, TNC etc eliminates the problem.
>
>I have checked all of the voltages on the modem and everything is correct.
>LEDs work fine.  Five volts present on all the ICs where it should be.
>Static precautions were taken during the build.
>
>Any suggestions?
>
>Rich - WN0X  - AP006
>
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