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Yes, I would agree that it has something to do with those signals.=20
PS_ON Should be low (grounded) to power up the PSU. PWR_OK is asserted=20
high (+5V) when all +12 VDC, +5 VDC, and +3.3 VDC voltages are within the=
=20
specs.

Since the AS200 MoBo seems to miss the PWR_OK input you will probably be=20
able leave that signal unconnected. Have you checked if the PWR_OK=20
signal is present in a second connector on the AS200 PSU? The PS_ON signal=
=20
should be connected to GND or to a On/Off switch that ties it to GND when=
=20
the switch is set to "On".

Cheers,
Anders

****************************************************
Anders Hogrelius, MSc
Senior Exploration Geologist
TM Resources AB (Tumi Resources ltd)
Dr Christinas v=E4g 13
SE-733 36 Sala
SWEDEN

Phone: +46 (0)224 77820
Cell phone: +46 (0)70 677-0210

On Tue, 6 Nov 2007, Emil Skoeldberg wrote:

> Miles, der Mouse, Anders,
>
> Thanks for clearing this out for me. I still have not got it to work
> though - the PSU does not power up when I try to switch it on. I have
> checked the connections, (after getting a multimeter), so my suspicion
> is that it could have something to do with the PS_ON and/or PWR_OK
> connectors. Does anybody know if they do - and how to wire them in
> that case?
>
> Cheers,
>
> Emil
>
>
>
> On Thu, Oct 25, 2007 at 09:00:39PM +0100, Anders Hogrelius wrote:
>>
>> Yes, you're quite right. The positive supply to the CMOS or NMOS circuit=
s
>> is called VDD and the negative or ground VSS or GND. According to
>> "Application-Specific Integrated Circuits" by by Addison Wesley Longman,
>> Inc it should be VDD and VSS in upper case letters rather than Vdd or Vs=
s.
>>
>> As the CMOS circuits normally use a +5V supply I'm pretty sure that the
>> connectors marked VDD should be connected to the +5V wires from the ATX
>> PSU.
>>
>> Cheers,
>> Anders
>>
>> ****************************************************
>> Anders Hogrelius, MSc
>> Senior Exploration Geologist
>> TM Resources AB (Tumi Resources ltd)
>> Dr Christinas v?g 13
>> SE-733 36 Sala
>> SWEDEN
>>
>> Phone: +46 (0)224 77820
>> Cell phone: +46 (0)70 677-0210
>>
>> On Thu, 25 Oct 2007, der Mouse wrote:
>>
>>>>> - what is "VDD"?
>>>> don't know.
>>>
>>> Almost certainly one of the power supply voltages, more canonically
>>> spelled "Vdd".  It's the drain-facing voltage, in much the same sense
>>> that in TTL Vcc is the collector-facing voltage.
>>>
>>> I can't remember offhand what voltage it normally is.
>>>
>>> And, of course, this is a generic guess; if anyone knows that in this
>>> particular context it means something else, please, correct me!
>>>
>>> /~\ The ASCII=09=09=09=09der Mouse
>>> \ / Ribbon Campaign
>>> X  Against HTML=09       mouse@rodents.montreal.qc.ca
>>> / \ Email!=09     7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B
>>>
>
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