60 Chapter 4
Troubleshooting
To Troubleshoot the Instrument
To Troubleshoot the Instrument
This section describes basic procedural flow of troubleshooting when servicing the
E5071C. The primary procedural tool in this section is the flowchart. The flowchart
contains entire troubleshooting path from a failure symptom to the isolation of faulty
assembly, and will direct you to the completion of repair in an ordinary manner through the
possible failure symptoms. Reference letters (Yes/No) on the flowcharts point to
procedural steps that briefly explain the troubleshooting method to be performed next.
Primary Trouble Isolation
The primary trouble isolation procedure can be performed without disassembling the
E5071C.
Figure 4-2 shows the trouble isolation flow chart.
Step 1. Turn the instrument power on
About a few minutes after the E5071C is turned on, the measurement view is displayed on
the screen. The display on the screen should be similar to
Figure 4-8, “Measurement view,”
on page 67.
Step 2. Check the display
• If no display appears on the LCD after the E5071C is turned on, go to “No Display
troubleshooting” on page 62.
• If the E5071C stops in booting process despite something being displayed on the LCD,
go to
“Boot Process Troubleshooting” on page 64.
• The power-on self test is performed once automatically after the E5071C measurement
view is displayed. If the power-on self test fails, go to
“Troubleshooting Using
Diagnostics Test” on page 68.
Step 3. Check the basic function
If the front-panel/keyboard/mouse controls, LCD display, data storage, remote interface or
another function (except for measurement part) does not work correctly, go to
“Function
Specific Troubleshooting” on page 79.
Step 4. Check the measurement function
If the instrument fails on performance test, go to “Performance test failure
troubleshooting” on page 86.
If the measurement function does not work correctly, perform the diagnostics test provided
in the E5071C's service function. When the diagnostics test fails, go to
“Troubleshooting
Using Diagnostics Test” on page 68.
NOTE The diagnostics test includes some unique measurement function tests in addition to the
tests that are common to the power-on self test. Thus, it is necessary to perform this test
even if the power-on self test passed.
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