PDP-11/34A help needed

Looking from back to front, i.e. with the box horizontal, power supply nearest you, front panel furthest: H745 (-15V) on the far left; two H741 (5V) adjacent to the main transformer in the middle; core/battery/empty on the right. Note: the above test is not reliable. I have at least one system unit for which exactly the opposite is true: there is a continuous groove from D to E (and not a keying ridge), but not from C to D. So, if the card is in backwards, the deeper post-D cut sits against the CD boundary while the shallow pre-D cut is in the groove, and the card is level. Conversely, if the card is in correctly, then the shallow pre-D cut rests against the CD boundary; the slot is deeper than that, so that if the card is pushed in as far as it will go, it isn't level. Rather follow this: (Left, looking from front to back; and they go in slot D, where A is adjacent to the power supply and F adjacent to the front panel.) While on the subject, most of the grant cards I have have a trace running This might be a good time for me to ask whether any of the more experienced people might look at, verify or criticize the diagrams I made myself to identify Unibus and Qbus card connector pinouts. (I found it remarkably difficult to find pinout information on-line for non-in/out Unibus connectors, so I know the Unibus SPC diagrams are incomplete.) Postscript versions; these are 'actual size', so that one can hold a card against the diagram to quickly locate pins. (US letter size, but will fit if centered on A4): http://www.kw.igs.net/~schoedel/dec/bus/qbus.ps.gz (6K) http://www.kw.igs.net/~schoedel/dec/bus/unibus-ab.ps.gz (5K) http://www.kw.igs.net/~schoedel/dec/bus/unibus-cdef-spc.ps.gz (9K) GIF versions, retouched a little to look better on-screen: http://www.kw.igs.net/~schoedel/dec/bus/qbus.gif http://www.kw.igs.net/~schoedel/dec/bus/unibus-ab.gif http://www.kw.igs.net/~schoedel/dec/bus/unibus-cdef-spc.gif xfig for the above and several other variations: http://www.kw.igs.net/~schoedel/dec/bus/fig.tar.gz (52K) Equivalent text 'diagrams': http://www.kw.igs.net/~schoedel/dec/bus/u-diagram.txt http://www.kw.igs.net/~schoedel/dec/bus/q-diagram.txt -- Kevin Schoedel schoedel(a)kw.igs.net