[nsp] zytek AC power supplies

Stephen J. Wilcox steve at telecomplete.co.uk
Wed Aug 13 16:35:12 EDT 2003

I'd put a 2nd PSU in if you can even if temporary you should be able to spot 
failures in the 1st one..


On Wed, 13 Aug 2003, Ralph Doncaster wrote:

> I have a 7200 with a Zytek supply:
> Power supply 2 is Zytek AC Power Supply. Unit is on.
> A few weeks ago the 7200 started spontaneously rebooting:
> System returned to ROM by power-on
> It does this every 1-3 days with no pattern in the timing.  It's plugged
> into an APC masterswitch PDU, and none of the other equipment in the same
> PDU has rebooted.  In case it was a bad outlet in the PDU, I got my tech
> to move it to a different outlet in the PDU.  I'm still getting reboots.
> Other than the reboots there's no other indication I can find of something
> wrong with the power supply:
> Voltage readings:
>         +3.45 V  measured at +3.49 V
>         +5.15 V  measured at +5.19 V
>         +12.15 V measured at +12.34 V
>         -11.95 V measured at -11.81 V
> I'm used to power supplies completely failing, but I haven't seen a power
> supply act like this before.  Would the situation I've described be
> indicative of anything other than a power supply that needs replacement?
> Ralph Doncaster, IStop.com president
> 6042147 Canada Inc.
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