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[aprssig] BUSTED TM-D700 - 2nd time

Andy Gonzales KG6RWO at comcast.net
Thu Jan 26 03:46:13 UTC 2006


A zero ohm resistor, similar to a wire jumper but shaped like a resistor for assembly purposes where you need a crossover path I take it.

I am completely inexperienced in working with surface mount boards, which I presume this is.  Plus I am not sure how to access the board.  Any tips ?
  ----- Original Message ----- 
  From: J T 
  To: TAPR APRS Mailing List 
  Sent: Tuesday, January 24, 2006 7:37 PM
  Subject: Re: [aprssig] BUSTED TM-D700 - 2nd time


  Andy,

  I had a similar problem with a D700 that stopped accepting GPS data.  On the main board right after the GPS jack there is a zero Ohm resistor.  For some reason that went open in my radio.  I replaced it with a short mag wire and it has worked fine since.  It might be something to check.

  -Jerome, W0JRT

  Andy Gonzales <KG6RWO at comcast.net> wrote:
    The TNC board on my D700 has apparently gone south, for the 2nd time in 5 months. I have had the unit for about a year now.  The problem manifests as an inabioity for the GPS signal to get into the TNC. All the usual isolation and troubleshooting confirm that it is not the GPS or the cabling.  The first time, I though it was a mechanical connector problem but the fix was to replace the TNC board (with a "reconditioned" untit ?)

    I sent it back for repair once, and got it back just in time for a long trip and now it looks like I will have to do it again. This time the trio is a few months away. Has anyone else experienced this problem ?
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