I looked around the board more and found "POR" etched on the board next
to where the orange wire is soldered in and "P5" next to where the blue
wire is soldered in.
"P12" is etched at where the yellow (+12V) wire is soldered in. "GND" is
at where the black wires are soldered in. "N12" is at where the white
(-12V) wire is soldered in.
How should POR be wired?
alan
On 12/31/23 3:33 PM, Alan Perry via cctalk wrote:
Not really. As I said, Sun and Axil, while using the same 12-pin power
connector, put the pins in different positions and color code the
wires differently. For the 220, Axil also sourced the PSU from a
different vendor and it is a completely different size (almost the
same size as a flexatx psu). Also, only 10 of the 12 pins are used.
The Sony PSU used in pizza box sun4c system changed from black
(GND)/red(+5V)/yellow(+12V)/blue(-12V)/orange(+5V POR) to
black/red/blue/brown/gray. The sun4c lunchboxes used the same
connector except they started call the orange/gray pin SENS (is that
the same as POR in Sun's usage?). The sun4c lunchbox scheme continued
through the sun4m lunchboxes. The sun4m pizzaboxes went to an 18-pin
power connector with the same wire color scheme, except gray became
"PwrOff"/"Poff".
The PSU in my Axil 320 (a SS10/SS20 clone) uses the 18-pin connector
and a color scheme similar to the SS10/20 one but I haven't checked
all of the pins to see if they are completely the same.
On 12/31/23 2:44 PM, Wayne S via cctalk wrote:
Also a link to the lx service manual
http://www.obsolyte.com/sun_lx/sparcLX.pdf
Sent from my iPhone
On Dec 31, 2023, at 14:37, Wayne S <wayne.su...@hotmail.com> wrote:
Does this help?
https://allpinouts.org/pinouts/connectors/power_supply/sun-sparcengine-motherboard-power-supply/
Sent from my iPhone
On Dec 31, 2023, at 13:48, Alan Perry via cctalk
<cctalk@classiccmp.org> wrote:
Does anyone here have a running Axil 220 or 245 (Sun SPARCstation LX
clone)? My 220 has a dead PSU and I am trying to get it working with
a modern PC PSU. But I don’t know the pinout for the power connector.
While the power connector is the same as used by Sun, the pinout and,
aside from +5V and GND, the wire color scheme are different. I have
identified 3 of the 6 wire colors and 7 of the 10 pins. The wire
color scheme seemed to be a match for early sun4c but I just found
something that suggests a couple wire colors are used differently.
I have found that black is ground, red is +5V, and yellow is +12V.
White, orange, and blue are TBD. A marking on the PSU board suggests
white is -12V. Blue and orange seem to only used by a daughter board
centered on a LM339 chip. But, as a software guy, I can’t tell what
it does.
Anyone here have any insight here that might help me?
alan
