15 May
2012
15 May
'12
8:12 p.m.
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
15 May
15 May
10:36 p.m.
On 5/15/2012 6:12 PM, Stefan Skoglund wrote:
Can we get more information about fan for what device
and other details please.
Thank You, Ben.
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Check Vff for 6.3 vac, then try draining the chip.
see the 25120 application notes.
16 May
16 May
12:23 a.m.
ben wrote:
On 5/15/2012 6:12 PM, Stefan Skoglund wrote:
Can we get more information about fan for what device
and other details please.
Thank You, Ben.
Yes, if the drain is not connected to the municipal waste line, a
build-up of discarded bits in the FIFO will cause the part to assert the
can_full line.
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Check Vff for 6.3 vac, then try draining the chip.
see the 25120 application notes.
3:39 a.m.
The intarwebs have an expert developing flowcharts for the purpose of PC repair
I commend to the user
http://xkcd.com/627/
Dave Caroline
2:59 p.m.
On 5/15/2012 6:12 PM, Stefan Skoglund wrote:
I've only ever sene the 25120 data sheet. There are application notes too?
I know that according to the data sheet, a failed fan can cause the 25120
WOM to overheat and fail (it needs serious airflow!), but I wasn't aware
that the reverse was the case. Is this some magnetic effect?
-tony
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Check Vff for 6.3 vac, then try draining the chip.
see the 25120 application notes. 
15 May
15 May
10:46 p.m.
On Wed, 16 May 2012, Stefan Skoglund wrote:
see subject.
perhaps supply more detail than a generic reference back to the subject
line.
What can i do about this ? (The fan doesn't turn
when applying power.)
Even more detail than THAT!
brush?
brushless?
AC?
DC?
Voltage?
Common?
Custom?
current consumption?
Continuity in windings?
Shorts in windings?
Does it turn freely when power is NOT applied?
Does it run when power is applied if given a helping start?
Did it stop suddenly while running?
Or has the problem been builfing slowly over time?
If it's in a Dell, the answers are different than if it is an
irreplacebale unique one.
10:48 p.m.
You try hooking it up to a bench top power supply just to make sure it
works, are the power lines to it getting proper voltage? The basic
stuff... if those aren't panning out, you may have a ceased motor, and
its time to either scrap and replace it, or disassemble and rebuild it.
Stefan Skoglund wrote:
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
16 May
16 May
1 a.m.
On 5/15/2012 8:48 PM, Curt @ Atari Museum wrote:
You try hooking it up to a bench top power supply just
to make sure it
works, are the power lines to it getting proper voltage? The basic
stuff... if those aren't panning out, you may have a ceased motor, and
its time to either scrap and replace it, or disassemble and rebuild it.
Or clean it.
Stefan Skoglund wrote:
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
10:44 a.m.
ons 2012-05-16 klockan 08:07 +0200 skrev Pontus Pihlgren:
On Wed, May 16, 2012 at 02:12:12AM +0200, Stefan
Skoglund wrote:
Sk?vde.
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Perhaps try to find a spare Indy and replace it?
Whereabouts are you?
Regards,
Pontus. 
2:08 p.m.
On 16/05/2012 07:07, Pontus Pihlgren wrote:
On Wed, May 16, 2012 at 02:12:12AM +0200, Stefan
Skoglund wrote:
First check it's not just stuck; it may just want some lubrication
(light oil, not WD40 or any similar junk). It's rare for fans to burn
out, it's common to have bearings problems. Or buy a repalcement. It's
a standard size.
--
Pete Peter Turnbull
Network Manager
University of York
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Perhaps try to find a spare Indy and replace it?
3:31 p.m.
On Wed, 16 May 2012, Pete Turnbull wrote:
First check it's not just stuck; it may just want
some lubrication
(light oil, not WD40 or any similar junk). It's rare for fans to burn
out, it's common to have bearings problems. Or buy a repalcement. It's
a standard size.
First remove all dead mammals, arachnids, and insects, and any parts
thereof!
3:44 a.m.
On 16/05/2012 01:12, Stefan Skoglund wrote:
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Power to the Challenge, or to the fan directly? Some variants of the
PSU in Indys and Challenge S boxes don't run the fan until the
temperature rises above a certain point.
--
Pete Peter Turnbull
Network Manager
University of York
10:51 a.m.
ons 2012-05-16 klockan 02:12 +0200 skrev Stefan Skoglund:
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Before the fan started as soon as i pushed the start button (of course
with mains applied.)
So did the disks too.
Nothing of this happens now.
The PSU gets warm (not hot) but it worries me a bit that the memory
banks also heats up. The processor sink also heats up.
This is with the lid removed so the processor sink should get a bit
warm.
To the hecklers:
THIS IS NOT ANY PEEECCEEE
I hope i was pretty clear about the type of machine (SGI Challenge
S) :-)
11:49 a.m.
On Wed, 16 May 2012, Stefan Skoglund wrote:
To the hecklers:
THIS IS NOT ANY PEEECCEEE
I hope i was pretty clear about the type of machine (SGI Challenge
S) :-)
Actually, it was quite easy to misinterpret the title as "challenge s"
being a synonym for "difficulty". Sorry about that. Capitalizing might
have helped a little, but not necessarily enough at the beginning of the
line. Perhaps "nonworking fan in SGI Challenge S"?
What else can you tell us about that fan?
Will other fans FIT? ("Dude, you're getting a Dell"?)
Is it a good enough one to warrant the effort of trying to fix it, rather
than replacement?
How are the bearings in it?
Does it TRY to turn?
Continuity?
Shorts?
4:25 p.m.
ons 2012-05-16 klockan 02:12 +0200 skrev Stefan Skoglund:
Are you ssying the disks aren't running either? If so this sounds more
like a PSU problem than a fan problem,
I would start by measuring the votlage at the fan connector. The expected
votlage should eb marked o nthe fan. Do you get any voltag at all between
the fan terminals? What about the power conenctors for the disk drives? I
woudl expect a +5V and +12V supply there, are you gettign both of them?
Does anything happen when you press 'start'?
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Before the fan started as soon as i pushed the start button (of course
with mains applied.)
So did the disks too.
Nothing of this happens now.
I hope i was pretty clear about the type of machine (SGI Challenge
S) :-)
My apologies, I didn't get that...
-tony
17 May
17 May
1:20 p.m.
New subject: challenge s with nonworking fan SONY APS 81 supply
ons 2012-05-16 klockan 21:25 +0100 skrev Tony Duell:
Are you ssying the disks aren't running either? If
so this sounds more
like a PSU problem than a fan problem,
I would start by measuring the votlage at the fan connector. The expected
votlage should eb marked o nthe fan. Do you get any voltag at all between
the fan terminals? What about the power conenctors for the disk drives? I
woudl expect a +5V and +12V supply there, are you gettign both of them?
Does anything happen when you press 'start'?
It is a sony power supply (aps 81)
At power on the led on the corner blinks red and then goes over to a
steady green.
The disk and the fan doesn't starts.
Remark: the old disk was an apple badged scsi disk who started to show
read errors so i replaced it with an IBM dfhs disk.
That disk could of course be bad.
What was the usual serial settings for Challenge S ?
The machine has been on a shelf for almost 2 years with a balky hd for 2
years when i replaced the disk at tuesday.
I hope i was pretty clear about the type of machine (SGI Challenge
S) :-)
2:08 p.m.
New subject: challenge s with nonworking fan SONY APS 81 supply
On 17/05/2012 18:20, Stefan Skoglund wrote:
It is a sony power supply (aps 81)
They tend to be better than the Nidec ones, and the fans in most Sonys
don't run unless they need to.
At power on the led on the corner blinks red and then
goes over to a
steady green.
The PSU has to be good to do that; the LEDs are controlled by the CPU.
The disk and the fan doesn't starts.
Remark: the old disk was an apple badged scsi disk who started to show
read errors so i replaced it with an IBM dfhs disk.
That disk could of course be bad.
Or set to not spin up automatically, and perhaps the Challenge is
stopped at the diagnostic menu. Check the drive jumpers. I assume
yours is 50-pin normal SCSI, not 68-pin wide (and obviously not SCA) or
do you have a wide to narrow adapter on it?
What was the usual serial settings for Challenge S ?
8N1 9600 baud. But you can set it to other values in the NVRAM.
--
Pete Peter Turnbull
Network Manager
University of York
3:26 p.m.
New subject: challenge s with nonworking fan SONY APS 81 supply
At power on the led on the corner blinks red and then
goes over to a
steady green.
So it sounds like the PSU is starting up.
The disk and the fan doesn't starts.
DO you hae a voltmeter (if not, I suspect you're not going to get very
far...). If so, check the voltage between the fan terminals, I am going
to stick my neck out and guess this is a 12V DC fan (what does it say on
the label?).
I am goign to guess that the drives have normal 4 pin power conenctors.
The middle 2 pins are both grounds. What do you measure on the outside 2
pins (separately!) with respect to these grounds?
-tony
16 May
16 May
2:36 p.m.
see subject.
What can i do about this ? (The fan doesn't turn when applying power.)
Well, you could start by giving use some more information :-). 'Fan'
covers a lot of different devices, and 'not working' can mean a lot of
things too.
In particular ;
Is it a computer fan, or an RK05 type blower, or a table fan, or a window
fan, or what?
Is it AC, DC, what voltage, etc?
Is there definitely the right voltage at at he fan terminals? What about
the polarity if it's a DC fan?
HAs it ever worked in this location?
Does it turn freely by hand?
Does it attempt to run? Can you start it by hand and have it keep going
It almost certainly can be got going again, but it may take more work
than you want to put in.
-tony
4521
days inactive
4522
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19 comments
9 participants
participants (9)
-
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
cisin＠xenosoft.com -
curt＠atarimuseum.com -
dave.thearchivist＠gmail.com -
jimpdavis＠gorge.net -
pete＠dunnington.plus.com -
pontus＠Update.UU.SE -
stefan.skoglund＠agj.net