Ive 3 of these compacts & one spare analogue board.
Ive only just measured voltages like you have - perhaps by now you have this sorted?
anyway, in case not, or other people measure the same 22V:
2 of mine (working, +5V and +12v measure spot on after a re-cap and clean of the & analogue PCB, one has a minor issue remaining where the display isnt centered horizontally) have the early (ish) version of the analogue board. However, I only measure 22.7V on one and 23V on the other where the Bomarc schematics say they should be 32V(ish) - at the same diode you are getting 22V. I spent some time looking into this and I now suspect that 22-23V is fine for my PCBs, they seem to be working very well and all other voltages that Ive measured are OK. Whilst there are errors on those schematics it seems unlikely that they got this wrong - there are several nodes where they give measured values around that part of the PSU..... But the PCB number on mine are all slightly higher than the one on the Bomarc, mine are 630-0420 (240V). Also I cant find any part numbers on the PSU transformers or the HT transformers that match the ones on the Bomarc schematics.... I suspect that mine may have different transformers that are designed to work at 22-23V rather than 30ish...
So, perhaps if yours have that same PCB version, 22V may be OK! for ref ive attached pics (from the spare PCB, not yet re-capped, measures 20V ish!) of the transformers.
Incdentally, after a re-cap Ive seen many, many issues with these that are down to electrolyte on the PCB, wavey display etc etc...
I suspect that many probs that others have replaced parts for have fixed the issue because soldering has evapourated the electrolyte! - opto, diodes etc - on one of mine the wavy display & poor +5 and +12 regulation were down to leakage from the primary side across the opto from electrolyte on the PCB, this is not good! its supposed to isolate for safety!!!.
But loads of probs can be caused by this, cleaning one of mine has helped with the horizontal centering of the display...
Soap and water work well, Ive used IPA on cotton buds in selected areas on the component side, but Id be wary of using it accross the whole board, esp on the solder side - there appears to be a 'conformal coating' or similar on the board which is prob there to help with creepage from high voltages esp' if the board gets dirty over time...
The 12V that is used to power hard drives and the fan also does the CRT heater - but TBH ive never seen the sort of cathode glow i was expecting!
