Keysight E5071C ENA - To Check the Touch Panel; To Check the LCD

Keysight E5071C ENA Network Analyzers 97
Troubleshooting
Function Specific Troubleshooting
Step 4. Randomly press the front panel keys. The key code along with the name of
the pressed key are displayed in the dialog box as shown in Figure 4-24. Turn
the rotary knob clockwise or counterclockwise. The dialog box indicates the
direction of the turned knob and a count of RPG output.
Figure 4-24 Key code and key name display example
Step 5. To exit the front panel test, press key three times.
• If multiple keys fail to work, a problem in PCA Front Key is suspected. Also
check the flat cable between the PCA Front Key and PCA Digital Bridge.
• If only a specific key doesn't work, check first if the key is subsided in the
panel.
• If the rotary knob doesn't work, check the PCA Front Key involving the RPG.
To Check the Touch Panel
Procedure
By touching the LCD display panel, select or change the setting of a function in
the softkey menu and, then, perform the same operation with hardkeys.
• If the touch panel doesn't work correctly whereas the hardkeys function
normally, a failure seems in the touch screen controller assembly (CNTR
TOUCH PANEL) or touch-panel LCD assembly (LCD-TPANEL ASSY). (The
touch panel is not replaceable independently of the LCD.)
• Check the cable between the touch screen controller and the serial
interface connector on the CPU Mother Board Assembly.
• If no problem is found in the above checks, a failure in the CPU Mother
Board Assembly is suspected.
To Check the LCD
Procedure
Step 1. Press key.
Step 2. Click Service Menu and, then, Test Menu in the softkeys menu.