2009 date but no PbF statement anywhere seen.
Strange protect cct, +140V on the red supply and +65V on the black,
continuity to +ve of the main bridge rect, but not for the -ve tab.
Time to take the amp apart to get to the othe rside of the ps board, no
obvious failings there topside. For the moment the smokey staining above
one of the 4 TOP66 I'll take to mean it was taking more than its fair
share of the remaining 3 after the base resistor failed on one of the 4.