I opened up the power supply to trace the common and ground wires. While they terminated at points close to each other on the board, I couldn't see if they or their traces touched. There were to many other components in the way and the botton of the board has a second board mounted closely on...
I am putting a new 5 pin DIN plug on a switching power supply for a KVM Switch. The label on the power supply provides the following information.
Pin 1: Ground
Pin 2: Common
Pin 3: +5VDC
Pin 4: -5VDC
Pin 5: +12VDC
With my voltmeter I can find the +5VDC, -5VDC and +12VDC voltages. They are on...