Something to consider other than that (where is it?) connection of 9100 wire at C408 and the 9110 and 9120 wires at the panels. Back at the C408 connector, I once had a T300 rental machine that was about to drive me bat $hit crazy. Machine would work flawless for day after day, then all of a sudden, nothing. Every time the customer would call me about that dead machine, I'd show up, it would work perfect. Bang head. Kinda hard to fix something that ain't broke. Finally a day came it was dead when I got there. Found there was no power on the 1900 computer power wire coming out of the C408 connector. It was getting power on the input side of the connector, but nothing coming out. Pins and sockets inside the connector looked fine, but they damn sure weren't no power coming out of C408 on wire 1900. Being out in the middle of nowhere my option was to connect a jumper for wire 1900 from the input side of C408 to the output side. Machine came to life. My point, in your case, find wire 9100 on the output side of C408 connector and either probe it or strip it open to check continuity between it and the 9110 and 9120 wires at the panels. You need to eliminate a possible problem at the C408 connector before you start search for that junction of 9100, 9110 and 9120.
Good morning W59 (and the rest of you Guys helping with or following this thread), I hope all of you are doing well in these crazy times. Keep your chin up, this too will pass!
Back to my issues with the 763. Once I found the wiring diagram online and using the info you Guys had provided I started tracing the 9100 wire. I unplugged the J2 connector at the computer and the C408 connector and pinned the terminals to test the wire.
(I also found trace marks of probing on the 9100 wire so someone that knew some of the great info you Guys have shared with me had already been looking for this issue).
I
do have continuity from the J2 to C408, I do
not have it from the other side of C408 to the connectors at the left or right upper panels.
When I get back to it (hopefully Monday after work) I will probe the 9100 wire leaving C408 and pin test the terminal on the upstream side of C408 to make sure it is not a bad connection between the terminal and the wire. If that is good, it only leaves the hidden connection somewhere inside the wiring harness where 9100 connects to the 9110/9120 wire.
While I was thinking about how to find the hidden connection I may have come up with a way to find it. I know when the telephone tech comes to work on a communication wire issue in our 5 story building he hooks a tone generator on one end of the suspect wire and he can trace that tone on that wire from communication room to communication room until he finds the bad connection. If the (tone generator device and tone reading/finder device) will work from floor to floor on a large building, then it stands to reason that it would work on this wiring harness for just a few feet. I have a friend that has one of these tracing tools that I can barrow.
So if this works I will be able to cut the mesh wiring harness covering where the tone ends and repair the bad connection without having to cut more of the mesh than is necessary. Should all of this work the way it works in my mind (admittedly my mind is a strange thing and everything does not work in the real world as it does in my mind
)!!! I will be able to share with all of you where this hidden connection is.
I would be so happy to contribute something to this site that could possibly help someone else (at some point) that may have this same or similar issue in the future. I have gained so much helpful info from all of you and it is greatly appreciated. Must of you Guys are people that have been in the trenches with these machines and have "been there done that" and your knowledge of these machines and different issues they present is priceless.
I am an old country boy that loves to turn wrenches (and I must not be smart enough to realize that I am not supposed to be able to fix these machines without any formal training
) but your help has made all of my endeavors on these machines successful. These projects have caused me to do a lot reading your posts, searching the Forum, and eliminating one possibility after another until the cause was actually found.
I thought that one day I would be smart enough to not jump on projects that I don't know anything about and have no training in. Well, I will be 60 in a couple more months and obviously, I have not gotten smart enough to stop doing this type of stuff!!
Thanks again Guys for your time and replies!!!
B-Crazy