Power Supply - IBM PS/2 90 XP 486 Hardware Maintenance Reference

IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR

Power Supply

4.1 Power Supply
On the Model 90, the power supply automatically switches to the 100-125 V
ac range or to the 200-240 V ac range.
On the Model 95, the power supply can be manually switched to support
either the 100-125 V ac range or 200-240 V ac range. The ac input is
converted to dc outputs that supply the system with proper operating
voltages.
When the system is powered-off for 8 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 turns on the green power-on light
on the front of the system indicating that the power supply is functioning
correctly.
¦ Copyright IBM Corp. 1990, 1992
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