19 Sep
2011
19 Sep
'11
6:01 a.m.
I ran my meter across all of them and I'm getting the same voltages you
did.
Any other ideas on what could be this beastie's problem? Its looking
more an more like something I'm not going to be able to work around.
Brian
On Sat, 2011-09-17 at 22:07 +0100, Peter Coghlan wrote:
I wasn't able to find able to find a voltage pinout for the power supply
to test it.
Here are the notes I made on the power supply connectors in my Alphaserver 1000A
which has a single power supply in the lower bay which I called PSU0.
The readings were taken with a cheap and cheerful analogue multimeter which may
be reading a little on the high side.
The location of pin 1 is marked on the board but I couldn't tell whether the
numbers run up and down or across. I assumed up and down, like an IDC connector.
J21 power connector on main board:
PSU Main board
-------- ----------
1 (purple) GND GND
2 (black) Output? Input? -7.7V when running
3 (black) GND GND
4 (black) GND at PSU0 Connected PSU detect?
5 (blue) Output? Input? +12V when running
6 (black) PSU1 only Connected +4.2V when running PSU detect?
7 (yellow) Output? Input? -12V when running
8 (red) Output Input +5V at all times
9 (red) Output? Input? +5.1V when running
10 (grey) Output? Input? -5V when running
11 (black) Connected GND
12 (orange) Output? Input? +3.5V when running
13 (white) Input? Output? Normally 0V. Pulse high to trip PSU.
14 (black) Connected GND
15 (white) PSU0 only +4.5V after running. Power good?
16 (white) Input Output Ground to enable PSU power on
17 (white) PSU1 only 0V at all times? Power good?
J19 power connector on main board:
All red leads +5.1V
All black leads 0V
J20 power connector on main board:
All orange leads +3.5V
All black leads 0V
Regards,
Peter Coghlan.