Service Guide E8364-90038
4- 15
PNA Series Microwave Network Analyzers
Troubleshooting
E8362C, E8363C, E8364C
Front Panel Troubleshooting
Checking the RPG (Front Panel Knob)
To check the RPG knob:
1. Press the UTILITY
key.
2. Rotate the knob and check for a fluid movement of numbers on the analyzer display.
•
If the movement of numbers is not smooth or no numbers appear at all, suspect a faulty A1 front panel
interface board. To replace the A3 front panel interface board, refer to
“Replacing the A3 Front Panel
Interface Board” on page 7-14
.
A2 Display Test
The display should be bright with all annotations and text readable. The display test allows you to check for
non-functioning pixels and other problems.
NOTE
If the display is dim or dark, refer to
“Front Panel Troubleshooting” on page 4-12
.
What Is a Damaged Pixel?
A pixel is a picture element that combines to create the image on the display. A pixel is about the size of a
small pin point.
A damaged pixel is:
•
A pixel that has a constant blue, green, or red appearance that will not change, or
•
a pixel that has a constant black appearance that will not change.
How to Run the Display Test
To run the display test, perform the following:
Press UTILITY
, then
, then
, then
.
A multi-color screen is displayed. Be prepared to look for the symptoms described in
“How to Identify a
Faulty Display.”
Follow the instructions on the screen.
How to Identify a Faulty Display
A display is considered faulty if:
•
More than 0.002% of the total pixels have a constant blue, green, red, or black appearance that will not
change.
•
Three or more consecutive pixels have a constant blue, green, red, or black appearance that will not
change.
•
If the A2 display assembly is determined to be faulty, replace it. Refer to
“Replacing the A2 Display
Assembly” on page 7-13
.
Preset
System
Service
More
Display Test
Summary of Contents for E8362C
Page 11: ...Service Guide E8364 90038 1 1 1 Safety and Regulatory Information ...
Page 21: ...Service Guide E8364 90038 2 1 2 General Product Information ...
Page 33: ...Service Guide E8364 90038 3 1 3 Tests and Adjustments ...
Page 81: ...Service Guide E8364 90038 4 1 4 Troubleshooting ...
Page 137: ...Service Guide E8364 90038 5 1 5 Theory of Operation ...
Page 171: ...Service Guide E8364 90038 6 1 6 Replaceable Parts ...
Page 257: ...Service Guide E8364 90038 7 1 7 Repair and Replacement Procedures ...
Page 341: ...Service Guide E8364 90038 8 1 8 General Purpose Maintenance Procedures ...