New PDP 11/34
ard at p850ug1.demon.co.uk
Wed Feb 3 13:56:55 CST 2010
> A PDP11/34 has just arrived... I need some basic help before I'll power it =
> The description of the current setup can be seen there :
> 1- There is 2 wires cable coming out the front panel, pins TB1/TB2,
> which goes to the rear of the box, towards the power supply. From the
> schematics Fig 9-5 (p64):
> this cable should go to a M9301 ? What if I don't have a M9301?
> Is there a M9301 Boostrap/Terminator Maintenance Manual available
> somewhere by any chance?
IIRC, that cable is associated with the BOOT button on the panel, and is
used to get the M9301 to start a ROM bootstrap. If you don't have a
bootstrap ROM board, and are going to be entering the bootstrap programs
on the keypad, you can leave this cable disconnected. But I recomend
findign an M9301 or M9312.
> 2- How can I test the power supply? I don't see any voltage control
> points, I couldn't find how I can=A0access=A0to the boards under the
Take the bottom off the PCU box (slacken one screw each side and slide it
to disenage the fixing slots). You will then see the wire-wrap side of
the backplanes. You can unplug the power input conenctors (6 pin and 15
pin AMP plugs from the power distrbution PCB (this will disconenct the
logic from the PSU) and check the voltages at the sockets on the power
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