4-2 Service Guide N5230-90014
Troubleshooting PNA Series Microwave Network Analyzers
Information in This Chapter N5230A
Information in This Chapter
The information in this chapter helps you:
• Identify the portion of the analyzer at fault.
• Locate the specific troubleshooting procedure to identify the assembly or peripheral at 
fault.
The sections in this chapter are arranged in a logical troubleshooting order. The following 
table lists the sections and a brief summary of what to look for in that section.
Chapter Four at-a-Glance
Section Title Summary of Content Start Page
‘Getting Started with 
Troubleshooting’
A starting point to begin troubleshooting. Page  4-4
‘Power Up Troubleshooting’
Power-up problems:
• Power supply problems 
•LCD problems
• Bootup for the network analyzer interface
Page  4-6
‘Front Panel Troubleshooting’
Problems occurring after the network 
analyzer interface is loaded:
• Does the display color appear correct?
• Do the front panel keys function 
properly?
• Does the front panel USB connector 
function properly?
Page  4-16
‘Rear Panel Troubleshooting’
Problems associated with the rear panel 
interconnects.
The data found at these rear panel 
interconnects can be used to troubleshoot the 
CPU board.
Page  4-20
‘Measurement System 
Troubleshooting’
Problems with the measurement portion of 
the analyzer.
• Checking the A, B, R1, and R2 signals.
• Checking the source group.
• Checking the signal separation group.
• Checking the receiver group.
Page  4-26
Instrument Block Diagrams
Block diagrams for the analyzer including all 
options.
Page  4-47