Keysight Technologies N5247B, Service Manual

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4-20 Keysight N5247B Service Guide
Troubleshooting
Front Panel Troubleshooting
4-
5. If the device does not perform correctly, the USB may need to be reset.
Use Windows Device Manager to look for any cautions or warnings and
repair those first. Refer to Windows Help.
6. If the device still does not perform correctly, the USB board is faulty. Refer
to “Removing the A2 USB Board” on page 7-10 .
A1 Front Panel Interface Board
This assembly performs the following functions:
— All signals from the front panel interface board are routed through the
motherboard/midplane board to the CPU.
— It routes USB signals between the front-panel USB connector and the A17
CPU board.
— The speaker produces the audio output from signals supplied by the A17
CPU board.
— It routes key pad commands from the keypad to the A17 CPU board.
— It routes display signals from the A17 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:
1. Press File > Minimize Application , then press the Speaker icon ( ) on
the Windows Toolbar.
2. The windows slider opens. Verify the volume is not muted, then slide
volume up or down .
Else, skip to step
4 .
3. Optional, if audible tone is heard, reset volume slider to zero or mute.
4. If the audio is still not heard, suspect a faulty speaker. Refer to “Removing
the A1 Front Panel Interface Board and Keypad Assembly” on page 7-10
and to “Removing the Speaker Assembly” on page 7-12 .
Checking the Operation of the Key Pad Commands
To verify the key pad functionality, refer to “Front Panel Keypad and RPG Test”
on page 4-15 .
The Windows Device Manager can be used to enable/disable the USB
drivers and may repair your USB hub(s). Refer to Windows Help.