XXXII
Preface
This manual contains service information for the
6644/6645/6646 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 6644/6645/6646 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.