Rotel RQ970BX phono stage convert 115v to 230v

It appears so, but post some close, clear photos here first.
The actual schematic is not completely clear in this regard.

The AC101 jumper marked AC5 is for 230VAC.
The AC102 jumper, marked AC4 is for 115VAC.
 

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Does this claim really answer the thread opener's question?
Well, here ist is: The schematic shows a tapped power transformer primary winding. Setting the jumper AC101 is for 230 Vac, while AC102 is for 115 Vac mains voltage.
Best regards!
 
No but that was already answered adequately so your answer is as useless as my claim 🙂 The design looks nice enough for some good quality new caps, no more no less. The opamps used are above standard anyway. The PSU could be improved big time with a LT3045/LT3094 board.
 
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