Re: (ASCEND) Max 4000 Power Supply

["Lennon" <lennon@igrin.co.nz>]

I think these days anyone who can afford a max box can also afford Insurance
for
their office/equipment. :-)

Thanks
Craig Whitmore
iGRIN Internet

----- Original Message -----
From: Paul M. Ledbetter <Paul@austintx.net>
To: <ascend-users@bungi.com>
Sent: Saturday, 5 February 2000 8:42 AM
Subject: Re: (ASCEND) Max 4000 Power Supply


> Update on the 4000.
>
> We received the new upper power supply and installed it.
>
> Once we replaced fans we were ready to power it up.  We only put the unit
> back together enough to test everything out.  No modem cards installed,
> just the chassis together basically.  All it did was spin the fans and all
> 4 lights on front just glowed.  Nothing more.  Put a terminal cable on it,
> and received no data.  Guess the power supply failure was a bit more
> damaging to the unit that just itself.  Possibly the lower power supply is
> bad too, but no conclusive proof to that.  It looks fine by a visual
> check.  We are going to put a meter on it and see what we can figure out.
>
> Next?
>
> Paul M. Ledbetter
> Austin Internet Access
>
> At 01:17 PM 2/2/00 -0600, Paul M. Ledbetter wrote:
> >At 12:15 PM 2/2/00 -0600, Jim Logan wrote:
> >>At 09:46 AM 2/2/2000 -0600, you wrote:
> >>>Anyone had a 4K power supply fail?  What was the end damage?  Were you
> >>>able to find both supplies from a third party, or did you have to go
> >>>back to Ascend?
> >>>
> >>>Ours appears to have failed big time and we have another one on it's
way
> >>>(Thankfully other suppliers besides Ascend have the one that blew), and
> >>>we are wondering if anyone else had one fail.  Once you replaced the
> >>>P/S, did the unit function correctly?  Did you ever figure out why it
failed?
> >>>
> >>>Ours appear to have over-heated, but yet all of the fans "appear" to be
> >>>free moving when spun by hand.  This unit has always done well, and
> >>>never skipped a beat.  I hate to see it go down in flames like this,
but
> >>>after 3 years, anything goes.
> >>
> >>   The good news, there are 3rd party sources for the power supply as
> >> well as the fans. I can give you some of that info if you want.
> >
> >That would be great!  I have found a source for the upper supply, but not
> >the lower one and might need that info if it turns out to be bad
> >also.  The top supply actually had "expanded" capacitors and diodes, so I
> >think it took the brunt of the blow.
> >
> >Now, as for the fans, I think I had better replace them, just to be on
the
> >safe side.  At this point, new is better....
> >
> >
> >>   The bad news,  what we have found out is that a 'shorted' fan is what
> >> typically blows the supplies and you can risk loosing the main board
via
> >> the spikes caused.  There is no alternative sources for the main
boards.
> >
> >This is the part that scares me.  I can only pray that the board was not
> >affected.  We did have a power outage on Monday and even though the unit
> >is on a UPS, it ended up rebooting.  Maybe that is pure coincidental, but
> >it is more data for the diagnosis.
> >
> >Thanks for all of the help!!
> >
> >Paul M. Ledbetter
> >Austin Internet Access
>
>
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