Thread: 19v E-pc42 pin-out

There is no -12v coming from that psu the label is misleading.
I have powered my epc40 for 3 years with a Carnetix 12v psu and a 19v laptop car adapter.

Is there anychance you could send me a quick diagram of that connector cant really see it on that pic,
Also is the -12 just a ground then?

Thanks

Originally Posted by AdrianObrien

Is there anychance you could send me a quick diagram of that connector cant really see it on that pic,

Yes later today I should have something for you.

Originally Posted by AdrianObrien

Also is the -12 just a ground then?

Thanks

Yes.

Do you have a connector to work with?

yes and no i have one kind of the same without the clip to hold it in, it fits and makes contact tho

First off I have a E-pc 40 and a E-pc 42.
They are a celeron 1mhz and p3 1.8ghz.
I have both AC psu's ( bricks ) that were supplied with these pc's as new.

One has a label shown below that has the notation -12v.

I just measured the output of the one with this notation and I am happy to report it is NOT a negative. It is POSITIVE. I think they (HP) split the 12v onto two wires and two pins since the current was so high and went higher with faster processors.

Any way here is a scan of the power supply.

If you are building up a psu from scratch let me know and I will tell you how I did mine.








I found the following, peak load conditions;

19v supply 1.3 Amps
12v supply 4.2 Amps


Power Good 3.3volts immediately when swithcing on the PSU.
It appears to be generated by the PC not the PSU.
And now for the good news
THE PC RUNS WITH IT DISCONNECTED, IT CAN BE IGNORED

If you could provide detail on what you used, it would be very helpful.

Thanks in advance!

For mine i used an "old" ATX conector that i cut down to size, its got the same shapes as the connector need for the E-PC42 then just use two car adaptors, 1 x 12v and 1 x 19v

Originally Posted by AdrianObrien

For mine i used an "old" ATX conector that i cut down to size, its got the same shapes as the connector need for the E-PC42 then just use two car adaptors, 1 x 12v and 1 x 19v

Wow I've looked at this thing a couple dozen times and never realized it was a partial ATX.

Thanks!