11 Dec
2016
11 Dec
'16
8:52 p.m.
I started updating my blog with (hopefully useful) information.
I did a write up on the SGI Indigo so far and will update it with future
findings. It's at http://ethan.757.org/?p=32
I made a list of all the tantulum SMD capacitors of the style of the one
that fried. I think I figured out digikey part numbers for most (And
published the sizes I measured of the caps.)
If the cap that fried belongs to the audio section, I was thinking maybe
those components use negative PSU voltages (op-amps, DACs) so maybe the
PSU is doing something funky. Finding a pinout for the Indigo PSU might
take a little bit of work -- but since I have mine apart I should be able
to document some of it.
So many projects!
--
Ethan O'Toole
12 Dec
12 Dec
2:47 a.m.
http://forums.nekochan.net/viewtopic.php?t=3731 has the pinouts. Works like
a charm ;)
On Mon, Dec 12, 2016 at 5:52 AM, <ethan at 757.org> wrote:
I started updating my blog with (hopefully useful) information.
I did a write up on the SGI Indigo so far and will update it with future
findings. It's at http://ethan.757.org/?p=32
I made a list of all the tantulum SMD capacitors of the style of the one
that fried. I think I figured out digikey part numbers for most (And
published the sizes I measured of the caps.)
If the cap that fried belongs to the audio section, I was thinking maybe
those components use negative PSU voltages (op-amps, DACs) so maybe the PSU
is doing something funky. Finding a pinout for the Indigo PSU might take a
little bit of work -- but since I have mine apart I should be able to
document some of it.
So many projects!
--
Ethan O'Toole
6:27 a.m.
http://forums.nekochan.net/viewtopic.php?t=3731 has
the pinouts. Works like
a charm ;)
I found that in my hunt but I think those pinouts are for the
Indy/Challenge S machines? The Indy had a soft power on button on the
front, the Indigo has a reset button and speaker mounted to the power
supply (but the wires from those are just passed directly to the power
supply connector.)
Might get a chance to poke at it tonight after work and I'll compare!
Thanks!
- Ethan
--
Ethan O'Toole
7:29 a.m.
Damn, you're right, that's the pinout for the Indy. I have both an Indy and
an Indigo with a modified ATX power supply.
I can't for the life of me find the page again that had the pinout (the
service manual is not helpful:
http://www.megarat.com/indigo/docs/indigo_service.PDF).
I'll go and check ;)
On Mon, Dec 12, 2016 at 3:27 PM, <ethan at 757.org> wrote:
http://forums.nekochan.net/viewtopic.php?t=3731 has
the pinouts. Works
like
a charm ;)
I found that in my hunt but I think those pinouts are for the
Indy/Challenge S machines? The Indy had a soft power on button on the
front, the Indigo has a reset button and speaker mounted to the power
supply (but the wires from those are just passed directly to the power
supply connector.)
Might get a chance to poke at it tonight after work and I'll compare!
Thanks!
- Ethan
--
Ethan O'Toole
7:59 a.m.
Damn, you're right, that's the pinout for the
Indy. I have both an Indy and
an Indigo with a modified ATX power supply.
You're running an Indigo on ATX power supply guts? Interesting. My
co-worker has a SGI Fuel on his desk with a bad PSU and has talked about
converting it.
--
Ethan O'Toole
9:18 a.m.
On Mon, Dec 12, 2016 at 4:59 PM, <ethan at 757.org> wrote:
The Fuel also have a "convert an ATX psu" option, it is on this wiki
page : http://www.nekochan.net/wiki/Fuel_PSU_repair
(there is also a thread in the Nekochan forums about it)
--
Regards,
Torfinn Ingolfsen
Damn,
you're right, that's the pinout for the Indy. I have both an Indy
and
an Indigo with a modified ATX power supply.
You're running an Indigo on ATX power supply guts? Interesting. My co-worker
has a SGI Fuel on his desk with a bad PSU and has talked about converting
it. 
13 Dec
13 Dec
12:42 p.m.
On Mon, Dec 12, 2016 at 10:59:36AM -0500, ethan at 757.org wrote:
I've done that conversion and documented in on nekochan. There are some
caveats.
/P
Damn,
you're right, that's the pinout for the Indy. I have both an Indy and
an Indigo with a modified ATX power supply.
You're running an Indigo on ATX power supply guts? Interesting. My co-worker
has a SGI Fuel on his desk with a bad PSU and has talked about converting
it.
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