Re: TI-86 Parallel Link Problems

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: TI-86 Parallel Link Problems
From: Grant Stockly <gussie@ALASKA.NET>
Date: Sat, 8 Nov 1997 09:57:27 -0700
Reply-To: Grant Stockly <gussie@ALASKA.NET>
Yes.  What he said is correct.  The calc is very pickey when it comes to
data transfer.  My cable is a little over 10 feet long and it worked fine.
(unshielded)  I think I've already said this, but even if one of the data
wires are touched, the link test will fail and the calc won't send data.
Another problem could be in the big group of plugs you have, are they all
connected together right?  If you have a tester, put a lead on each of the
three (one at a time) and test for continuity.  Then test for resistance
and if there is a short, find it and then it should work.

Grant Stockly
>JL279 wrote:
>>
>> Please help:
>> My link isn't working...
>> On the calc. end, I have a 3/8" stereo plug, plugged into a 3/8" to 1/8"
>>  reducing plug.  On the computer end I soldered the diodes into the correct
>>  pins, then soldered the other end of the diodes to the wires coming from the
>>  calc. end.  I then realized that I had to connect pins 12 and 13 to pins 2
>and
>>  3.  So, I cut a couple of wires and connected the corresponding pins.  My
>>  ground is correct...pin 22, or at least I think it's correct.  I have tried
>>  switching the two wires on my calc end, with no luck.
>>
>> Any help would be greatly appreciated.
>>
>> Jim
>> JL279
>
>I had this problem as well, along with my TI-86.
>
>I was using 3 different (same AWG) wire braided together to make my
>cable. It was about 5 feet long. Linktest gave me great results. Even
>thus, the cable didn't work.
>
>I rebuilt my cable, using new diodes, and everything, new cable, and
>much shorter cable. I was using telephone cable, 3 core solid copper
>wire. (yes it is not quite flexible...) But it worked. Also the diodes
>were soldered directly to the pins, last time, I soldered the diodes to
>small extention wires, which I'm sure has no effect. But another thing
>to consider, did you put too much heat to the diode? it may have damaged
>the diode. If not, check your plug, and check the soldering (connecting
>the plug to the rest of the cable.
>
>-(: Modem Boy :)-
>-(: -=TI-86=- :)-