According to this Q & A, it's very likely that the Soyuz spacecraft's orbital module can be manually separated independent of other spacecraft operations.
On this CollectSpace page, there's an excellent photo of a bank of Soyuz control panel buttons with guards to protect against accidental activation of critical functions:
I note that three of the buttons (#3, #12, #13) are labeled with "БO", the abbreviation for бытовой отсек (bytovoi otsek), or Orbital Module. I don't know any Russian, so I can't tell what the remainder of the labels say. It looks like buttons #12 and #13 are labeled very similarly if not identically.
Are any of these labels plausibly interpretable as "separate/jettison/disconnect orbital module"?
Any transliteration/translation/interpretation of the other controls is welcome in addition.