xxxii 
Preface
This manual contains service information for the 
2284 
Service Level A (SL-A) 
model of the IBM Personal 
Computer, worldwide. This manual is intended to be 
used as a stand-alone document to service machine 
type 2284 products. It is divided into the following 
chapters: 
Notices
 contains important safety information and 
notices required to service this computer.
General Information
 contains a brief description of 
this manual. 
Check Procedures
 provides step-by-step 
instructions that aid in locating the failing Field 
Replaceable Unit (FRU). 
Diagnostic Aids
 explains how to use the diagnostics 
tools for isolating failures. 
Repairing Information
 contains illustrations and 
descriptions to disassemble and reassemble the 
computer. 
Parts/Test Point Locations
 contains illustrations and 
descriptions of the locations of the major parts, 
jumpers, and connectors.
Safety Inspection Guide 
contains information about 
inspecting a machine for safety problems before 
putting the machine under a Maintenance 
Agreement. 
Parts Catalog
 contains descriptions, illustrations, 
and part numbers for individual FRUs. 
Appendix A, FRU Number Index 
contains part 
numbers listed in numerical order.