Service Guide N5227-90001 4-13
PNA Series Microwave Network Analyzers Troubleshooting
N5227A Front Panel Troubleshooting
Front Panel Troubleshooting
The front panel assembly consists of the A1 front panel interface board, the keypad, the A2 USB board, and
the A3 display assembly. The following tests verify the operation of the front panel assembly when the
analyzer is in the measurement mode. If the instrument fails to power up correctly, or it is difficult to verify
due to a faulty display, refer to “Power Up Troubleshooting” on page 4-6.
Refer to the following sections to verify the operation of the noted assemblies.
• “Front Panel Keypad and RPG Test” on this page
• “A3 Display Test” on page 4-15
• “Checking the A2 USB Board” on page 4-16
• “A1 Front Panel Interface Board” on page 4-16
If all assemblies are working correctly, continue troubleshooting with “Rear Panel Troubleshooting” on
page 4-17.
Front Panel Keypad and RPG Test
Test the front panel keypad by running the front panel test. To run the front panel test, perform the following:
Press UTILITY , then , then , then .
A
Front Panel Key Test Utility dialog box will be displayed, as shown in Figure 4-4.
Figure 4-4 Front Panel Key Test Utility Dialog Box
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