HP Forum Archive 19

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HP71 zebra connector Message #1 Posted by Alberto Fenini on 19 Oct 2010, 4:02 p.m. Dear All, I had posted few days ago a couple of pics of an HP71b I'm working on. It was basically missing the zebra connector. Following your suggestions and the pics found on Etienne's web site I have done my best to replace it. These are the left and the right side of the HP71b with the new connections. To my surprise, the number of connectors available on the left side is 16while on the right side we have 17points. To me it looks that the first and second soldering points on the right board are actually the same connection, neverless the question is : how the heck should I connect letf with right ??? Needless to say, I have attached the power supply but the units is still dead (well, it could be due to a million reasons anyway ....) As always, any suggestion is VERY welcome !!! Take care and thanks in advance, Alberto

Re: HP71 zebra connector Message #2 Posted by Bart (UK) on 19 Oct 2010, 5:00 p.m., in response to message #1 by Alberto Fenini Hi, Sorry, couldn't help noticing. There are 17 connection points on both sides. You have missed the 4th one from the top in the top picture, and second one from the bottom in the bottom picture (which indeed seem to be connected). Good luck, hope you get it working.

Re: HP71 zebra connector Message #3 Posted by Alberto Fenini on 19 Oct 2010, 5:09 p.m., in response to message #2 by Bart (UK) Hi, and thanks for noticing it, I knew about the 2nd from the bottom, I did it on purpose since I thought it was connected with the adjacent let me try agin and I'll post the results thanks again ! Alberto

Re: HP71 zebra connector Message #4 Posted by Alberto Fenini on 19 Oct 2010, 5:36 p.m., in response to message #3 by Alberto Fenini and it ..... WORKS !!!!!!!!!!! since it was purchased for 65,00 US$ on TAS described as "HP-71B non working for spare parts" I must admit the some time TAS is not too bad ... thanks everybody for helping me out, take care Alberto

Re: HP71 zebra connector Message #5 Posted by Bart (UK) on 19 Oct 2010, 6:22 p.m., in response to message #4 by Alberto Fenini Congratulations!! Always good to see an old calculating/computing device working again :).

Re: HP71 zebra connector Message #6 Posted by Jerry Raia on 20 Oct 2010, 1:21 a.m., in response to message #5 by Bart (UK) The 71 is a classic, one of a kind.

Re: HP71 zebra connector Message #7 Posted by Michael Meyer on 20 Oct 2010, 4:23 p.m., in response to message #6 by Jerry Raia The world is one HP-71b better! Congratulations! My first real computer, and still one very powerful machine.

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