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IBM 5150 Hardware Maintenance Manual

IBM 5150
357 pages
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Position the System Unit Power switch to
Orf
for
five
seconds,
then power the System Unit on. Check for the voltage at
P20-4
to
decrease from 2.0-5.5 Vdc to 0-0.8 Vdc when the
LED
is
on.
•
DID THE VOLTAGE
AT
P20-4 DECREASE FROM
2.0-5.5 Vdc TO 0-0.8 Vdc?
NO Replace the Logic Printed Circuit Board. See
Section 3, "Removal/Replacement."
YES
600-23

Table of Contents

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IBM 5150 Specifications

General IconGeneral
ProcessorIntel 8088
Clock Speed4.77 MHz
RAM16 KB - 256 KB
ManufacturerIBM
Model5150
Release Year1981
Storage5.25-inch floppy drives
GraphicsMDA or CGA
Operating SystemIBM PC DOS
PortsCassette, keyboard
Expansion Slots5

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