Agilent Technologies FieldFox MW N9913A, Service Manual, Page: 43 / 156

N9927-90003 4-7
FieldFox Analyzer Troubleshooting
Front Panel Group Troubleshooting
Front Panel Group Troubleshooting
Checking Display Brightness and Sound
If the display is dark (no backlight)
• Press System , 7
• Select
Preferences
• Select Preferences
• Use the arrow keys to select
Brightness
, press
Edit
, then use the arrow keys to change the display
brightness.
• If the A2 LCD display assembly is determined to be faulty, replace it. Refer to “Replacing the A2
LCD, the LCD Shield, and LCD Cables” on page 7-23 .
• Use the arrow keys to select
Volume
, press
Edit
, then use the arrow keys to change the volume. A
beep should occur each time the value is changed.
• Plug headphones into the unit if there is no sound from the internal speaker. The internal speaker is
disabled when headphones are plugged in.
• If the audio is still not heard, the System board may be faulty. Refer to “Replacing the A5 System
Board” on page 7-35 .
Checking the Front Panel Keys
To check the front panel keys, push each labeled key and compare with the specific functions.
• If all the key names are correct, then the front panel keypad is working.
• If some of the keys are not working, suspect a faulty keypad. To replace the keypad, refer to
“Replacing the Front Case (including the A1 Keypad)” on page 7-17 .
• If none of the keys are working correctly, suspect a faulty A3 Front Panel Interface board. To replace
the A3 Front Panel Interface board, refer to
“Replacing the A3 Front Panel Interface Board (FPIB)”
on page 7-25 .