Power Supply - IBM PS/2 65 SX Hardware Maintenance Reference

|3.1 Power Supply

|The power supply automatically switches to either the 100-125 Vac or the
|200-240 Vac range. The ac input is converted to dc outputs that supply
|the system with proper operating voltages.
|When the system is powered-off for 10 seconds or more and then powered-on,
|the power supply generates a 'power good' signal that resets system logic.
|The presence of the 'power good' signal indicates that the power supply is
|operating properly and that the minimum under-voltage sense levels have
|been established. This means that all system-board power requirements
|have been met.
+-----------------------------------------+
¦ Output ¦ Minimum Under-Voltage
¦ (Vdc) ¦ Sense Level (Vdc)
+------------+----------------------------¦
¦ + 5.0 ¦ + 4.5
+------------+----------------------------¦
¦ +12.0 ¦ +10.8
+------------+----------------------------¦
¦ -12.0 ¦ -10.2
+------------+----------------------------¦
¦ ¦
+-----------------------------------------+
|The 'power good' signal turns on the green power-good light on the front
|of the system. If the green light is not on, the power supply is not
|functioning properly.
IBM PS/2 Model 65 SX HMR
Power Supply
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