[Test-Equipment] Question Regarding Testing a Scope's HV Multiplier

[Barry]

I have a Kikusui COS6100M that has a faulty HV multiplier module (the output cable at its exit point developed an arc to ground).  I have a used replacement but I don't know the functional status of it.  Before I tear into this and replace the old one with a possibly faulty part, I wonder if I could perform a simple test on it.

>From what I can gather, the multiplier diodes have a forward voltage of 28V.  Would it make make sense to feed the input with a low AC voltage (enough to cause the first set of diodes to conduct) and monitor the output for DC?

Looking at the schematic, the anode gets 18kV from the multiplier but I don't know the input voltage to the multiplier; however, I *think* the multiplier yields some 32x the input voltage (there are five "stages" and I assume each stage doubles the previous stage's voltage).  If this is true, then that would put the operating input at around 560V which seems reasonable (to me).

If I feed the input with, say, 30V, then theoretically I should see around 960V at the output.  Is this a reasonable thing to try (realizing that's HV and care is taken, etc.)?  I'm just wanting to determine if the module works before using it as a replacement.

Thanks,
Barry - N4BUQ