schenkzoola
Member
I've worked out enough of the pinout to get the laptop running with a third party power supply. I don't have a good battery, so I wasn't able to really determine what the battery sense terminals do, or see what things look like when charging. I can dig in a little later after I build a replacement battery; a project for another day.
In the image you can see the pinout looking into the computer. These are the male pins.
1) Battery Sense - I don't really know what this signal does, other than it is related to the battery
2) Battery Sense - I don't really know what this signal does, other than it is related to the battery
3) PS_ON - Connect this signal to ground to turn on the power supply. The laptop doesn't care about this signal, only the power supply.
4) +18V - This is the main power feeding the laptop. This is at about +6v when PS_ON is disconnected.
5) Voltage Sense? - I believe this is to compensate for voltage drop across the wiring. When I disconnect this with the laptop powered, the voltage produced by the power supply increases slightly.
6) GND
I confirmed the computer will power with just 18V connected to pin 4, and 0V connected to pin 6, and all other pins open. This was tested with an SLT/386 and a bench supply.[/QUOTE]
In the image you can see the pinout looking into the computer. These are the male pins.
1) Battery Sense - I don't really know what this signal does, other than it is related to the battery
2) Battery Sense - I don't really know what this signal does, other than it is related to the battery
3) PS_ON - Connect this signal to ground to turn on the power supply. The laptop doesn't care about this signal, only the power supply.
4) +18V - This is the main power feeding the laptop. This is at about +6v when PS_ON is disconnected.
5) Voltage Sense? - I believe this is to compensate for voltage drop across the wiring. When I disconnect this with the laptop powered, the voltage produced by the power supply increases slightly.
6) GND
I confirmed the computer will power with just 18V connected to pin 4, and 0V connected to pin 6, and all other pins open. This was tested with an SLT/386 and a bench supply.[/QUOTE]