Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide 161
Front Panel Assembly
Troubleshooting
Troubleshooting
While the entire A6 Front Panel assembly can be replaced as one unit, it is
much more cost effective, and highly recommended, to only replace the lower
level assembly responsible for a given failure.
To provide access to the internal circuitry required to perform the
troubleshooting procedures in this section the instrument outer cover and
inner bottom cover will first need to be removed. Refer to Chapter 15,
“Assembly Replacement,” for instructions on how to remove and reinstall
these covers.
Power Switch Issues
If the instrument will not turn on with the front panel power switch, see “Power
Supply Will Not Turn On” in Chapter 8, “Power Supply”
If the Yellow standby LED does not turn on when power is applied to the rear
panel AC main input, see “Yellow Standby Front Panel LED is Not Working” in
Chapter 2, “Boot Up and Initialization”
If the green power on LED does not turn on when the instrument power switch
has been pressed, see “Green Power On Front Panel LED is Not Working” in
Chapter 2, “Boot Up and Initialization”
Display Problems
If the display remains blank after the instrument has been turned on and the
Green power on LED is on, see “Instrument Display Is Blank” in Chapter 2,
“Boot Up and Initialization”
Keyboard Issues
If there are any issues with either the front panel hardkeys, softkeys, RPG, or
LED indicators see “Front Panel Tests” in Chapter 5, “Service and Utility
Menus” If failures are detected during the Front Panel Test, follow the related
procedure below.
Key Test Failures
If a single key does not work the problem is either with the A6A4 Keyboard or
the A6MP1 Main Keypad. Remove and inspect them both to determine which
one is causing the problem.
If rows or columns of keys do not work the problem is either the A6A4
Keyboard, the A6A1 Front Panel Interface board, or ribbon cable W3 that
connects them together.
If all keys do not work the problem is most likely the A6A1 Front Panel Interface
board. See the “Front Panel Interface” troubleshooting section in this chapter.
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