3B1 power supply schematics

[Darryl Baker]

I've just finished disecting the blown power supply I had earlier last
week.  Well my companies power supply expert found a blown SCR (MCR72)
in what he believes is the high voltage limit circuit but it is hard to
decipher the circuitry. Anybody out there have the schematics so we(he)
can fix it?
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  /  )                    //     /  )       /
 /  / __.  __  __  __  , //     /--<  __.  /_  _  __    Darryl Baker
/__/_(_/|_/ (_/ (_/ (_/_</_    /___/_(_/|_/ <_</_/ (_   dpb at tellab5.chi.il.us
                     /    on the injured reserve list-> dpb at liltyke.chi.il.us
                    '