IBM 5170  -  Circuit diagram for IBM power supply unit (PSU)

  xxxxxxx WARNING:

Opening the 5170's PSU may expose you to hazardous voltages and currents.
Do not assume that those hazards will disappear shortly after disconnecting the PSU from mains (house) power.
Before opening the power supply, adequately educate yourself as to the hazards.
Hazard examples at here.

It is known that in the supply lifetime of the IBM 5170, that the 'innards' of the IBM supplied PSU varied from time to time.

IBM did not provide circuit diagrams of the PSU in the 5170 manuals.  Accordingly, circuit diagrams are hard to come by.

The circuit diagram in the link at here is for one variation of the PSU.