HP 8647A Operation And Service Manual page 108

Signal generator
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Service
Warning
Warning
This chapter provides the procedures to troubleshoot your instrument
to the assembly level. In addition to this introductory information
which includes shipping instructions and an overview
of
the operation
verification software, this chapter consists of the following three
major sections.
Chapter 5a provides the theory of operation for each major
assembly and a simplified block diagram to describe the
instrument's operation.
troubleshooting checklist, fuse replacement instructions, a diagram
of modulation test points and power supply LEDs, a power supply
distribution diagram, and an instrument block diagram.
Chapter 5c lists the service error messages and gives a description
of the error, and possible causes and resolutions.
w
Chapter 5b provides troubleshooting information consisting of a
These servicing instructions are for use by qualified personnel
only. To avoid electrical shock, do not perform any servicing
unless you are qualified to do
so.
This
is a Safety Class
1
Product (provided with a protective
earthing ground incorporated in the power cord.) The mains
plug
shall
only
be
inserted in a socket outlet provided with a
protective earth contact. Any interruption of the protective
conductor inside o r outside of the instrument is likely to make
the instrument dangerous. Intentional interruption is prohibited.
Shipping Your
Instrument Back to
Hewlett-Packard
If
it becomes necessary to ship your instrument back to HP, use the
original packaging or something comparable that provides sufficient
padding to protect the instrument. (See Chapter 3, "Installation," for
more detailed packaging information.) Fill out a blue repair tag and
attach it to the instrument. Repair tags are located at the end of this
manual behind the index.
A list of H P sales and service offices is located at the front of this
book on page v.
Service 5-1

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