Disassembly and Repair 5
Keysight 34980A Service Guide 117
3 To completely remove the power supply, unplug the main power input (brown
and blue) and the green/yellow ground wire from the power supply printed
circuit board. Unplug the fan power and dc power from the KOM pc board.
For testing purposes, y
ou can stand the power supply on end and insert it
into slots in the mainframe as shown.