Symmetricom 5071A, Assembly And Service Manual

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2. Service
Introduction
NOTE In the interest of PRESERVING its usability most of the
information in this chapter has been retained in its original form.
No attempt has been made to update the equipment, accessories,
or parts to reflect current availability. It is therefore necessary for
the user of this manual to consider the recommendations of test
equipment and accessories as suggestions. Some or all of these
items may no longer be available from Symmetricom or any other
vendors. An updated list of available replacement parts from
Symmetricom is provided in Chapter 5.
This chapter provides service information for your 5071A and is divided into
three major sections:
•
Returning the Instrument to Symmetricom for Service. This section
provides you with step-by-step instructions on how to return the
instrument for service.
•
Pre-Troubleshooting Information. This section provides you with pertinent
information such as safety considerations, recommended test equipment,
repair and after service considerations, service accessories, and
assembly identification and location.
•
Diagnostic Trees and Procedures. This section provides you with
diagnostic trees and procedures to isolate faulty assemblies or modules.
(Once you find a faulty assembly or module, use Chapter 4, “Replacing
Assemblies,” to remove the defective assembly and replace it with a
functioning unit.)
If the instrument is under warranty, return the instrument to Symmetricom for
service. Refer to the first section of this chapter titled “Returning the
Instrument to Symmetricom.” If you decide to troubleshoot the instrument
yourself, refer to the section titled “Diagnostic Trees and Procedures.”