I'm in the process of modifying a 360 power supply to power a 6 unit Motorola radio charger. I've got the +12v and the ground wired to live and ground on an NL-2 connector; and I've jumped the blue PS_ON lead to the +5v rail, as a few other mods have done. When I plug the supply in, I get power for an instant and then it shuts down. Nothing looks/smells fried, so I'm a little stumped. What am I doing wrong?

  • \$\begingroup\$ You should state the specifications of the 360 charger as well as the original one you are replacing. Even based on nameplate ratings compatibility can be a bit tricky as load regulation varies between power supplies. Sometimes 12VDC means a steady 12V through it's operating range, but aside from voltage ripple, a 12VDC power supply may actually provide 15V at no load and 12V only when at full rated load, resulting in voltage fluctuation for variable loads proportional to their variance. \$\endgroup\$ – K H Nov 12 '18 at 2:02
  • \$\begingroup\$ 360 charger spec is 12v, 9.6a. Original spec 14v and ~9a. \$\endgroup\$ – Jim B Nov 12 '18 at 2:08
  • \$\begingroup\$ Where are you getting this 5V rail from? does the xbox 360 PSU have a 5V rail, or are you deriving it from the 12V rail? \$\endgroup\$ – Hearth Nov 12 '18 at 2:11
  • \$\begingroup\$ Further notes: it shows orange light momentarily when plugged in with no connection on the NL-2, Then light turns off. Same when NL2 is connected. If I jump 5v to both RSENSE and PS_ON, light turns momentarily green, with NL-2 unplugged. \$\endgroup\$ – Jim B Nov 12 '18 at 2:15
  • \$\begingroup\$ Yes it has a 5v rail. \$\endgroup\$ – Jim B Nov 12 '18 at 2:16

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