Introduction; Check Procedures - IBM 2193 Maintenance Service Manual

Introduction

This chapter contains the check procedures used to diagnose
the causes of product failures. The diagnostic information
consists of:
Start: This is the starting point for any diagnostic action.
Based on high-level symptoms, the check procedure directs you
to more detailed procedures to help resolve machine failures.
Index of Symptoms, Messages, Error Codes, or Beeps: The
tables for BIOS Error Messages, Codes, Beeps, and Error
Symptoms list symptoms along with their probable causes, and
direct you to the applicable check procedures to help resolve
machine failures. These tables also list the field replaceable
units (FRUs) most likely to cause a particular problem.
Check Procedures: When the Start check procedure or the
Index of Symptoms, Messages, Error Codes, or Beeps tables
point you to a specific check procedure, proceed to that section.
If there are any notes or instructions at the top of the page, read
them before you begin with the procedure. Carefully read each
step of the check procedure and perform the steps as instructed.
If you do not remember the location of a specific part or test
point, or an adjustment or removal procedure, see the chapter
that contains that information. Always return to the check
procedure after you do this. In some cases, you are referred to
other check procedures to detect the cause of the failure.
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