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Preface
xiv Assembly-Level Service Guide
Instruments Covered by this Guide
This guide applies directly to HP 53131A, HP 53132A, and HP 53181A
Counters that have the same serial number prefix(es) shown on the title
page. If the serial number prefix of your Counter differs from that listed
on the title page of this guide, then there may be differences between this
guide and your instrument.
Instruments having a higher serial prefix are covered when required by
one or more manual-change sheets included with this guide. If a required
change sheet is missing, contact your nearest HP Sales Office listed at the
back of this guide. Instruments having a serial prefix lower than that
listed on the title page are covered in Chapter 6, “Backdating.”
Assembly-Level Service Guide Organization
This assembly-level service guide consists of a table of contents, preface,
eight chapters and an index. The page running headers identify the
chapters and sections of this manual. The chapter contents are
summarized as follows:
Chapter 1, “Performance Tests,” provides procedures that verify the
Counter operates properly and meets the HP 53131A/132A or HP 53181A
specifications given in Chapter 7, “HP 53131A/132A Specifications,” or
Chapter 8, “HP 53181A Specifications,” in this guide.
Chapter 2, “Service,” is divided into seven main sections that provide
instructions for returning the Counter to HP for service, calibrating the
Counter, and troubleshooting the assemblies in the Counter.
Chapter 3, “Replacing Assemblies,” provides procedures for replacing
defective assemblies and/or modules in the Counter.
Chapter 4, “Retrofitting Options,” provides field-installation procedures
that help you install options into the Counter.
Chapter 5, “Replaceable Parts,” lists the replaceable parts contained in
the Counter, and explains how to order replacement parts for your
Counter.