To Check The Front Panel; To Check The Touch Panel - Keysight E4990A Troubleshooting Manual

To Check the Front Panel

To Check the Touch Panel

Impedance Analyzer
Procedure
Step 1.
Press
Step 2.
Click Service Menu - Test Menu - Front Panel. This
opens the Front Panel Test window.
Step 3.
Press the front panel keys. Red ticks will appear on the
Front Panel Test window whenever the corresponding key on the
front panel is pressed Turn the rotary knob clockwise or
counterclockwise. Red ticks will appear on the left of the rotary
knob on the Front Panel Test window when you turn
counterclockwise and on the right of the rotary knob when you turn
clockwise.
Step 4.
To exit the front panel test, click the
• If multiple keys fail to work, a problem in the A52 Front Panel
I/F board or A60 CPU Module is suspected. Also, check the
flat cable between the A52 Front Panel I/F board and A60
CPU Module.
• If only a specific key fails to work, check first if the key is
subsided in the panel.
• If the rotary knob fails to work, check the A52 Front Panel I/F
board involving the RPG.
Procedure
Using the LCD display panel, select or change the setting of a
function in the softkey menu and then, perform the same operation
using the hardkeys.
• If the touch panel does not work correctly when the hardkeys
function normally, a failure seems to be in the touch screen
controller assembly or touch-panel LCD assembly. (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 A60 CPU module.
• If no problem is found in the above checks, a failure in the
A60 CPU Module is suspected.
key.
1
Troubleshooting
button.
35