Home▸ Forums▸ 68kMLA▸ Serial Adaptor — #5
Post #5 by RickNel
Source Forum68kMLA
CategoryTroubleshooting
Post DateMon, 4 Mar 2013 - 01:01
Original URLhttps://68kmla.org/bb/threads/serial-adaptor.27169/
Post
the two outer pins have NC to each other, but #1 will have intermittent connection with #2 before it cuts out. #3 has an intermittent connection with #4, before it also cuts out. #2 to #3 has an ohm reading of 1.4Ω, suggesting to me that it is most likely a 1:1 transformer. But I don't understand the relationship between #1 and #2, #3 and #4 as stated.
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That test behaviour looks like there is a capacitance between the two tested pins. There might be more than just a transformer - perhaps some filter caps as well?

Strongly recommend getting the web page translated - Google translate usually works well enough to get the gist.

Rick

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