Keysight N5227B, Service Manual

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Keysight N5227B Service Guide 4-15
Troubleshooting
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 4-7 .
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 4-18
— “Checking the A2 USB Board” on page 4-19
— “A1 Front Panel Interface Board” on page 4-20
If all assemblies are working correctly, continue troubleshooting with “Rear
Panel Troubleshooting” on page 4-22 .
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 .
System
Service Diagnostics
Front Panel Test