IBM 5150 Hardware Maintenance Manual

Now check the rest of the power supply output voltages to
the System Board.
1. Leave your multimeter set on 12 V dc scale.
2. Check the System Board power connector for the voltages
listed in
the table.
--------------------------------------------
'"
1
2
_"-==-.J 3 Voltage Connectors
4
Min VDC MaxVDC
-Lead +Lead
+ 4.8 + 5.25
5
10
~~~~~
+ 4.5
+ 5.40
9 6
7
+11.52
+12.60 7
3
8
h
+10.80
+ 12.96
4 8
9
10
~"
11
12
ARE THE SYSTEM BOARD POWER CONNECTOR
VOLTAGES CORRECT?
NO Replace the power supply. See Section 3,
"Removal/Replacement. "
YES
020-6

IBM 5150 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	16 KB - 256 KB
Manufacturer	IBM
Model	5150
Release Year	1981
Storage	5.25-inch floppy drives
Graphics	MDA or CGA
Operating System	IBM PC DOS
Ports	Cassette, keyboard
Expansion Slots	5