On shift MO, EM Smooth shift up to 06:10, then M 2 HV went off. We spent some time attempting to restore it, then called Giovanni. He changed the controller, now apparently OK. The jet density was slightly increased in order to keep L constant. Ecm = 3406 (Chi0 low wing) Data taking summary run 5579 (inherited) Lint=259.5 nb-1 I(start)=38.5 mA I(stop)=35.9 mA run 5580 Lint=271.6 nb-1 I(start)=35.9 mA I(stop)=33.3 mA run 5581 -stopped at 6:30 upon discovering the HV fault-- (about 1 h of good data for this run) run 5582 -aborted after a short attempt to fix HV- (mostly junk) LOG 7 PAG 132-135 Ciao Ezio e Margherita