The unregulated voltages will not come up until the driver board is connected. The filter capacitors hold the voltage up near the top.

What is kind of confusing with Bally is they call one unreg supply 11.9vdc but it actually reads more like 15-18vdc when the driver board is connected. Yet they call the HV unreg supply +230v but it will not read that high unless the driver board is connected so they are kind of opposite each other in measurement whether or not hte driver board filter caps are in circuit.

Some DMM don't like reading the unloaded ripply HV for some reason too. I have one cheap DMM which will erroneously show really low volts DC at the rect test point when the driver board is not connected. The 100k, presumably for safety, resistor in series with the test point may have something to do with it.