Well at least not here because till today I don't had these receiver in repair and doesn't own one, at least not yet. And to find the schematic for it seems to me impossible to find.
Yeah indeed , but it depends what your issue is with this receiver. If it's some voltage regulator issue, then it could be probably find with measuring the coils or regulators on the board. It could be that these, or some of them are switched On/Off with the front panel which at least with the solo2 is most of the issues. In any case, this is to measure. Further, the solo2 (4k) works with most of the functions trough the cpu which has more functions as the older boxes. And so, when it's not a problem with some of the dc to dc voltage regulator, or software related, then it's most likely caused due a cpu issue. Not a easy repair to preform when that is the case. But still, main thing is to know if the voltages are delivered and correct.
I've bought this receiver and expect that it arrived soon so later I will post some technical information from it.