Service Guide 14-3
8719ET/20ET/22ET Assembly Replacement and Post-Repair Procedures
8719ES/20ES/22ES Assembly Replacement Sequence
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 Chapter 4 , “Start Troubleshooting Here.”
Follow up with the appropriate troubleshooting chapter that identifies the faulty
assembly.
Step 2. Order a replacement assembly. Refer to Chapter 13 , “Replaceable Parts.”
Step 3. Replace the faulty assembly and determine what adjustments are necessary.
Refer to this chapter.
Step 4. Perform the necessary adjustments. Refer to Chapter 3 , “Adjustments and
Correction Constants.”
Step 5. Perform the necessary performance tests. Refer to Chapter 2 , “System
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.
WARNING The power cord is connected to internal capacitors that may remain
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.
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