Re: Continuing the BA356 adventure...

From: Chris Scheers (chris_at_applied-synergy.com)
Date: 05/27/03 

Date: Mon, 26 May 2003 21:39:46 -0500

"Bradford J. Hamilton" wrote:
>
> In article <3ED295E0.BC04B63E@applied-synergy.com>, Chris Scheers <chris@applied-synergy.com> writes:
> >I now have my BA356s talking to the HSZ50 cleanly, but I still have some
> >questions.
> >
> >The BA356 16 bit interface has two yellow LEDs by the SCSI connector.
> >
> >According to the manual, these indicate a fan failure. When a fan
> >fails, the corresponding LED is supposed to light up, the other fan is
> >forced to high speed, and Shelf_OK signals the problem at the power
> >supply OK light and at the cable if so jumpered.
> >
> >Does this actually happen?
> >
> >If I remove a fan, I do not get any indication of a fault. (I would
> >think that the complete loss of a fan is a failure, but...) In
> >particular, the Shelf_OK signal does not indicate the loss of the fan.
>
> I don't suppose that the LED(s) themselves are failing?

I suppose that could be, but it is irrelevent.

When I remove a fan, I still have a good Shelf_OK signal.

I can test the Shelf_OK by inserting a second power supply (with no
power cord attached). The HSZ50 then reports a fan or power supply
failure. The failure is cleared when the second power supply is removed
(or gets power).

-----------------------------------------------------------------------
Chris Scheers, Applied Synergy, Inc.

Voice: 817-237-3360 Internet: chris@applied-synergy.com
  Fax: 817-237-3074

Relevant Pages

  • Re: Line Conditioner and UPS?
    ... fan failure, then the power supply design is defective. ... one would install a UPS? ... Second, if power supply failure created motherboard damage, ...
    (comp.os.linux.misc)
  • Re: 350 SDL normal temp range
    ... AC charge low. ... fan clutch failure - not as uncommon as some think ... the owners manual states than in town severe condition driving ...
    (alt.auto.mercedes)
  • Re: Your favorite silent 120mm fan?
    ... An MTBF of 400,000 hours implies a mean time to ... You replace the fan after one year because it's dusty? ... No, you might well have to replace it after 1 because that is the end of its useful life, *if* you want to get an every of 400,000 hours without a fan failure. ... Dave K MCSE. ...
    (alt.comp.hardware.pc-homebuilt)
  • Re: Continuing the BA356 adventure...
    ... The failure is cleared when the second power supply is removed ... > When you first apply power, you should see the lights flash. ... removing the fan is removing the capability of pulling ... When I shove a stick into one of the fans, the fault light comes on, I ...
    (comp.sys.dec)
  • Re: Cooked Hard drive
    ... 'Jack' wrote, in part: ... using My computer and double clicking on the drive icon I got the ... is a power supply fault rather than a hard drive failure, ... immediately after the fan stopped, you successfully read data from the ...
    (microsoft.public.windowsxp.basics)
Quantcast