Assembly Replacement Sequence - HP 8719ET Service Manual

Network analyzers
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HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers

Assembly Replacement Sequence

The following steps show the sequence to replace an assembly in the network analyzer.
Step 1. Identify the faulty group. Begin with
Follow up with the appropriate troubleshooting chapter that identifies the faulty
assembly.
Step 2. Order a replacement assembly. Refer to
Step 3. Replace the faulty assembly and determine what adjustments are necessary.
Refer to this chapter.
Step 4. Perform the necessary adjustments. Refer to
Correction Constants."
Step 5. Perform the necessary performance tests. Refer to
Verification and Performance Tests."
WARNING
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.
WARNING
The opening of covers or removal of parts is likely to expose
dangerous voltages. Disconnect the instrument from all voltage
sources while it is being opened.
The power cord is connected to internal capacitors that may remain
WARNING
live for 10 seconds after disconnecting the plug from its power
supply.
CAUTION
Many of the assemblies in this instrument are very susceptible to damage
from ESD (electrostatic discharge). Perform the following procedures only at
a static-safe workstation and wear a grounding strap.
Service Guide
Assembly Replacement and Post-Repair Procedures
Assembly Replacement Sequence
Chapter 4 , "Start Troubleshooting Here."
Chapter 13 , "Replaceable Parts."
Chapter 3 , "Adjustments and
Chapter 2 , "System
14-3

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