You won't be able to set up the power supplies by themselves, the other rails depend on the -150V rail, which has the voltage reference tube.
Pulling the 6AQ5 (V17 in the pdf manual) would be enough disable the EHT, while you are bringing it up and working on the power supply.
There are two connection sockets for the wiring to the EHT section, it looks to be J6 for the input and J7 for the EHT output. Remove the plug for J6 as the other method of disabling the EHT section, this is on the top of the EHT section, probably well hidden by the power supply board.
C133 was the one that shorted in mine, which probably wasn't good for the regulator tube on that rail.
David
factory