IBM 5150 Hardware Maintenance Manual

If you have a Diskette Drive, check the Diskette Drive power
connector.
(If not, continue on page 020-8.)
1. Reconnect the diskette power supply connectors. •
I I
2. Refer to the diagram below for the proper voltage readings.
You should get the same readings on
both connectors if
your system has two diskette drives.
Disk Drive Power Connector
Min VDC MaxVDC
-Lead +Lead
+ 4.8 + 5.25 2 4
+11.52 +12.60 3 1
Pins
1 2 3 4
WERE THE ABOVE VOLTAGE LEVELS PRESENT
BETWEEN THESE PINS INDICATED?
NO Replace the power supply. See Section 3,
"Removal/Replacement. "
YES
020-7

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