Checking The A2 Usb Board; A1 Front Panel Interface Board - Keysight N5224A Service Manual

Troubleshooting
Front Panel Troubleshooting

Checking the A2 USB Board

To verify proper operation of the USB board:
• Connect a known good USB device, such as a USB mouse, to a front panel USB port.
• Wait 15 seconds for the analyzer to verify the device connection, and then check the operation of the
USB device.
• If the device performs correctly, the USB board is functioning properly.
• If the device does not perform correctly, the USB board is faulty. Refer to
A1–A3 and Other Front Panel Subassemblies" on page

A1 Front Panel Interface Board

This assembly performs the following functions:
• It routes USB signals between the front-panel USB connector and the A21 CPU board.
• The speaker produces the audio output from signals supplied by the A21 CPU board.
• It routes key pad commands from the keypad to the A21 CPU board.
• It routes display signals from the A21 CPU board to the A3 display assembly.
Checking the Speaker
If no audio is heard:
• Verify that the volume is set correctly and the proper sound driver is loaded; do the following:
— Press UTILITY System
• Click on the
Sounds and Audio Devices
drivers and volume. If the audio is still not heard, suspect a faulty speaker. Refer to
Replacing the A1–A3 and Other Front Panel Subassemblies" on page
Checking the Operation of the Key Pad Commands
To verify the key pad functionality, refer to
Checking the Display
To verify the display functionality, refer to
4-16
, then Configure , then
entry. Follow the normal Windows procedure to check the sound
"Front Panel Keypad and RPG Test" on page
"A3 Display Test" on page
PNA Series Microwave Network Analyzers
"Removing and Replacing the
7-10.
Control Panel... .
7-10.
4-15.
Service Guide N5225-90001
N5224A and N5225A
"Removing and
4-13.