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?

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