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HP-82183A... Problem with ASTEC 0950-0408 :(
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HP-82183A... Problem with ASTEC 0950-0408 :(
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HP-82183A... Problem with ASTEC 0950-0408 :(
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06-29-2017, 09:35 PM
(This post was last modified: 06-29-2017 10:01 PM by Titi.)
Post: #12
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RE: HP-82183A... Problem with ASTEC 0950-0408 :(
(06-29-2017 08:18 PM)Paul Berger (Canada) Wrote: One thing I would check would be the reference voltage at pin 7 of U3, if it is wrong the output from the +5V logic supply will be wrong. The theory section starting on page 2-4 explains in some detail how this 5V regulator works. I find +5.04v here ! U3-pin 3 : 13.92v (with jumper W1) |
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