DEC LP20 backplane wiring diagrams

We have been trying to get working an LP20 printer interface on our 2065. ?We discovered just today that the issue we have had with bad control signals was not due to bad boards, but rather was due to the fact that the bottom 4 segments of the Unibus backplane into which the control card plugs have no (0) wires wrapped around the pins. We have the LP20 schematics, but the wiring diagram *for the backplane* is not included. ?It also is not to be found on microfiche, although there is a reference to it, with document numbers. ?We are specifically looking for 70-11427, 54-11704, and 50-11703. If anyone has any of these documents, please let us know ASAP. ?Otherwise, a young EE is going to have to spend time with the complete set of LP20 schematics and a spreadsheet program to generate a wire list and re-wire this thing by guess and by $DEITY, a process that will take several weeks with no guarantee of correctness of result. Thanks, Rich Rich Alderson Vintage Computing Sr. Systems Engineer Vulcan, Inc. 505 5th Avenue S, Suite 900 Seattle, WA 98104 mailto:RichA at vulcan.com mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/