[j-nsp] Backplanes & PS Failures

[Forbes Mike]

We have also seen many AC Power supply failures on M20's with Backplane
REV 07 710-001517.

Revs 02 and 03 of 740-007311 seem to be stable, the others were very
intermittent.  They would fail on power up but if you reseated them and
unplugged them multiple times they would eventually come up fine.

Mike


On Thu, 15 Jan 2004, Ivan Batanov wrote:

> We have seen multiple AC power supply failures as well on M20 Backplane
> REV 07 710-001517. The following PS have been stable for a while:
>
> Rev 02   740-007311
> REV 08   740-001465
>
> -Ivan
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Chris Layton
> Sent: Thursday, January 15, 2004 9:10 AM
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] Backplanes & PS Failures
>
>
> We have seen multiple DC power supply failures(due to fan failure) on
> our 2 M20s with REV 07 710-001517 backplanes. Our M20s with other rev
> backplanes have had no issues.
>
> The following message implies that this is a known issue for some
> backplane revs.
>
> https://puck.nether.net/pipermail/juniper-nsp/2003-May/000930.html
>
> Can anyone confirm that REV 07 is affcted by this fault?
>
> Thanks,
> -chris
>
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