Bill is correct.... Worth pointing out that M625 S2 and original, M725, M825, and M925 all make use of PFC rectifiers that feed high voltage DC current in the SMPS. Furthermore, it seems that M625 S2 is a substantial re-design under the hood... Sorry, I do not have too much detail yet, besides the use of ceramic boards, 4-pole caps... There is lots more detail.
G.
G.