If I remember correctly, a "4-pin molex" commonly seen on ATX power supplies are rated at a non-additive (you're limited to pulling max amps at either 5 OR 12v, but not both) 10A per pin up to 16awg, 8 at 18awg, and 6 at 22awg.I'm referring to the Molex 4 pin connector, the 8981 or whatever it is. It has 1 x +5V, 1 x +12V and 2 x ground wires and the connector itself is rated at a much lower amperage as it's only designed to run a hard drive.
Sense lines are located on the 24-pin ATX connector. They feed the voltage at the connector back to the power supply to detect over and under voltage conditions and make corrections. Usually you will see these lines bundled to the same pin as a supply line, but others, like 3.3v sense for example, can sometimes be found on pin 13 all by itself. Generally, these will be thinner gauge wires of the same color as the supply wire it is monitoring (reminder to never rely only on color, always use a meter and pinout diagrams to check things!).I think "sense lines" is what I'm looking for but how can I identify them because there is no mention in the PSU's specs.
Thanks for your information@phoenix07 Tested CPS2 on the bench, and it draws 2.8A on the 5V rail - i.e. a bit, but not terrible. With the cooler master supply, I measure 4.97 at the Jamma edge.
https://wiki.arcadeotaku.com/w/PCB_Power_Consumption
I thought my supergun is not designed good enough for power delivery as you said but for other boards it working properly.Sense lines are located on the 24-pin ATX connector. They feed the voltage at the connector back to the power supply to detect over and under voltage conditions and make corrections. Usually you will see these lines bundled to the same pin as a supply line, but others, like 3.3v sense for example, can sometimes be found on pin 13 all by itself. Generally, these will be thinner gauge wires of the same color as the supply wire it is monitoring (reminder to never rely only on color, always use a meter and pinout diagrams to check things!).I think "sense lines" is what I'm looking for but how can I identify them because there is no mention in the PSU's specs.
You should first check that the problem is the power supply and not your supergun though, as no amount of messing with sense wires will help you if the supergun is the one causing the problems by not being able to handle higher current loads.
Measure the voltage at the JAMMA edge, and then check the voltage at the molex connector you use to supply power to the supergun/board. If the voltage at the supply connector looks ok, but you're seeing huge drop across to the JAMMA edge, invzim is right, and your supergun is not designed well for power delivery.
If that is the case, your options then are, I suppose, to replace the supergun with something better, or, to inspect the supergun design and see if you can modify it safely to supply power to the edge by jumping a wire to the edge or something.
It seems it was too late, I saw the corrosion through the other sideRemove that battery stat, before it leaks any further. May be looking at damage from corrosion, outside of it having suicided which in itself isn't an issue, but the corrosion is.
I'm systematically removing all the batteries from my cps2 boards and replacing with the mod bios method. Still tweaking a pcb for it. Infinikey is a great solution too, but too expensive for me being outside of the USA.