ttooddddyy said:Is the 5 volts at the edge connect OK, if low it may cause this sort of problem.
ttooddddyy said:Is the 5 volts at the edge connect OK, if low it may cause this sort of problem.
MKL said:You're supposed to measure (and adjust) the voltage at the PCB edge connector, without a load you'll get false readings.
ttooddddyy said:As MKL said
With the load (board set) connected there will be current drained from the power supply resulting in voltage drop in the wireing harness, as the wires have a resistance.
So it is important to set the + 5 volts whilst measuring at the jamma edge connect, or preferably on the actual game board.
Some boards draw more current that others (resulting in more voltage drop in the harness) so its worth checking every time you swap boards. I usually set mine to just a whisker over 5 volts. I wouldnt set it to anything above say 5.2 volts.
ttooddddyy said:The heavier duty the cable the better, and as short as is practical. Certainly using more than the one ground will reduce the voltage drop.
a correction on terminology, when I said current drained, meant current drawn.
nruva said:Wow that thing even came up at all at 4.3? CPS2 games won't even spin the fan at that setting Yeah, up the +5 on that puppy. As for the power drain... seen it on a 4 slot, ended up surging as I was playing with the PSU and killed a few carts
nruva said:Wow that thing even came up at all at 4.3? CPS2 games won't even spin the fan at that setting
John_Smith said:And toddy, does this diode you speak of somehow lessen the shunt on the contacts or something? I’d love to hear more on that, as it sounds like I could get some more life out of the switches that way!