IBM 5150 Technical Reference

Power Good Signal
When the power supply is turned on after it has been off for a
minimum
of 5 seconds, it generates a 'power good' signal that
indicates there
is adequate power for processing. When the four r""\
output voltages are above the minimum sense levels, as described
below, the signal sequences to a TTL-compatible up level (2.4
Vdc to 5.5 Vdc),
is capable of sourcing 60 /LA. When any of the
four output voltages
is below its minimum sense level or above its
maximum sense level, the 'power good' signal will be
TTL-compatible down level (0.0 Vdc to 0.4 Vdc) capable of
supplying 500
/LA. The 'power good' signal has a turn-on delay of
100-ms after the output voltages have reached their respective
minimum sense levels.
Output
Under-Voltage Over-Voltage
Voltage
Nominal Sense Level Nominal Sense Level
+5Vdc
+4.0Vdc + 5.9 Vdc
-5Vdc
-4.0Vdc
- 5.9 Vdc
+
12 Vdc
+9.6Vdc
+14.2Vdc
-12 Vdc
-9.6Vdc -14.2 Vdc
Power Supply Connectors and Pin
Assignments
The power connector on the system board is a 12-pin male
connector
that plugs into the power-supply connectors. The pin
configuration and locations follow.
3-6 Power Supply

IBM 5150 Specifications

General

Brand	IBM
Model	5150
Category	Desktop
Language	English