On 2008-06-26, Huge <> wrote:
> On 2008-06-24, Trinean <> wrote:
>> "Huge" <> wrote in message
>> news:g3njvu$s6$...
>>> My SB2000 has just started displaying a slightly worrying (and irritating)
>>> fault; when it's switched on, it only runs for about 15 seconds and then
>>> switches itself off. On the second time of asking, it's fine.
>>>
>>> Any suggestions as to why?
>>
>> If you can disconnect the keyboard/mouse and instead hook a serial
>> connection to ttya, then maybe you can see if it spits out any error before
>> shutting down. Sometimes it's as simple as a CPU not being torqued properly.
>>
>> Assuming you have no way to troubleshoot this way you can remove both CPUs
>> and install just CPU0 torqued down properly and see if it works. Should you
>> still have issues remove this and put CPU1 in CPU0's slot and see if that
>> works any better.
>>
>> The SB2000 should have come with a green torque tool.
>
> I didn't even realise that SB2000s had torqued down CPUs. They look like plugin
> modules to me, like the ones in an U60. But I haven't looked lately.
>
> And no, it didn't come with a torque tool.
Hmm ... there are two formats of torque tool.
The older one which came in the SB-1000 mostly is a loop of 1/8"
diameter spring steel wire bent so when the proper torque is reached,
the ends of the loop touch. It is normally mounted in a bright green
plastic holder (the same color as the rings on the screws which mount
the CPU modules) which is slid between the two disk drive slots.
The newer kind is the same bright green, but looks like a stubby
screwdriver, and mounts in a plastic holder elsewhere in the system. I
can't tell you for sure, because I don't have an SB-2000, but I think
that it is near the drives at the junction of two pieces of sheet metal.
I have (in addition to two SB-1000s) a Sun Fire 280R (same
system board and CPU modules as the SB-1000 or SB-2000 with 900 MHz
US-III Cu CPUs) and the torque limiting screwdriver is in a different
location -- immediately visible once you open the cover -- which does
*not* switch off power unlike the SB-[12]000.
In any case, the driver releases with a click when it reaches
the right torque. IIRC, that is 5 In-Lbs, but I would have to dig out
the right manual to verify that. The bit of the screwdriver is a square
(Robertson) bit -- one of three common sizes. And yes, the torque is
critical -- too little and the connectors don't make reliable connection.
Too much, and you may damage the connectors on the board or the CPU
module.
From the Sun manual (806-4804-14.pdf, page 11) for the SF-280R
(same system board and CPUs as some versions of the SB-1000 and
SB-2000):
================================================== ====================
Your Sun Fire 280R Server Service Manual states that a torque
screwdriver is housed in the chassis between the disk drive bay
and the DVD-ROM drive bay. However, the torque screwdriver is
no longer included with the system. Instead, the torque
screwdriver is included with the optional CPU module.
Caution -- You must use the torque screwdriver to tighten the
captive screws on the CPU module the correct amount. If you
overtighten the captive screws, you can severely damage the main
logic board. If you undertighten the captive screws, you might
cause a loss of continuity and the system might not start.
Note -- You can also use an adjustable torque screwdriver set to 5
in-lbs.
================================================== ====================
The newest systems apparently did not come with the torque tool,
but (new) replacement or additional CPU modules were shipped with the
torque tool. If you have an adjustable torque-limiting screwdriver, you
can set it according to the values in the manual and get a Robertson bit
to put in to allow it to be used. Utica makes a very nice one, and the
model you want is the TS-100, but be sitting down when you read the
price. :-) There are three found on a quick eBay search, with current
bids ranging from $25.00 to $99.00, plus eBay store running from $99.00
to $219.00.
Note that the torque in the Sun manual is specified in
inch-pounds, but the TS-100 (Black Anodized) is calibrated in
inch-ounces, so you will need to multiply that 5 inch-pounds by 16 to
convert it to 80 inch-ounces.
Also -- note that the TS-30 (red anodized) is calibrated in
inch-pounds, but starts at 6. (However, it really works down at 5 well
enough for your purposes, if that is what you have.
I don't know whether the TS-35 is calibrated in Oz-In or in
In-Lbs, since I don't have one to examine.
Note that an eBay search for "Sun torque (wrench,screwdriver) is
bound to lead to frustration, because there is a brand of automotive
tools known as "Sun". That is what you get from a search. :-(
Good Luck,
DoN.
--
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