[sebhc] 12V supply for Disk Drives question

Mark Garlanger garlanger at gmail.com
Tue Aug 8 10:26:46 CDT 2006

Do I just measure the 12V supply, but have the DMM set to Vac in order
to see the ripple?


On 8/8/06, Carroll Waddell <carrollwaddell at sc.rr.com> wrote:
> Mark Garlanger wrote:
> > With a little effort, I was finally able to get to the back of the
> > power supply board to replace the blown capacitor in my Z-37 case.
> > Now, without a load, the 12V line is reading only 11.6 V. Is this
> > within spec, or does it look like the voltage regulator (or maybe one
> > of the other capacitors) need to be replaced? I've check the voltage
> > going into the 12V regulator, it's almost 21V which should be fine,
> > since the manual shows that it should be 18V.
> >
> > Thanks,
> >  Mark
> > --
> > Delivered by the SEBHC Mailing List
> >
> 11.6 might be ok. That's about 3% off. But if you have trouble still,
> I'd look for any AC ripple on the DC voltage. Use an AC meter or a scope.
> Carroll
> --
> Delivered by the SEBHC Mailing List
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