On 8/11/17 5:40 AM, Dominique Carlier via cctalk wrote: > Hi all, > > I continued my investigations about the power supply if the 8406 subsystem. > Here is what I observe: > > With the PSU in charge, I mean with a disk drive connected but without the > +24V : > +5V -5V +12V -12V: OK > If I connect the +24V to the drive this is at this moment than the power > supply goes mad and sends erratic alternating > voltages to the + & - 5V and + & - 12v.
It sounds like something is wrong with the disk drives, probably a shorted capacitor on the drive. If you apply a resistive load on the 24v does the supply still go crazy?
