Ethernet connector on Sun 4/110

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Article #12556

#12556

From: Rich Winkel UMC Math Department
Date: Sat, 06 May 1989 10:58

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We have two 4/110's, and both were originally shipped with defective
thicknet sockets.  The symptom was that the connector was very sensitive
to even slight movements; you had to fiddle with it to get it working, and
then hope no one moved the cpu or cable.  In both cases I shut down the
cpu and connected an ohmmeter between pins 1 and 13 (the power supply
lines for the tranceiver) and noticed that the resistance alternated
between infinity and around 900 ohms when I flexed some paperclip probes
inserted into it.

I swapped one cpu board for a new one and found the connection to be much
more reliable.  The connection was maintained even when the plug was at a
substantial angle to the connector.  (I'm about to swap the other cpu) Has
anyone else noticed this problem?  Is it a design defect?

Rich Winkel

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!husc6!rice!sun-spots-request
From: MATHRICH@umcvmb.missouri.edu (Rich Winkel    UMC Math Department)
Newsgroups: comp.sys.sun
Subject: Ethernet connector on Sun 4/110
Keywords: Hardware
Message-ID: <8904262234.AA27028@rice.edu>
Date: 6 May 89 10:58:27 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
Lines: 15
Approved: Sun-Spots@rice.edu
Original-Date: Wed, 26 Apr 89 17:30:45 CDT
X-Sun-Spots-Digest: Volume 7, Issue 271, message 11 of 18