To Check The Touch Panel; To Check The Lcd - Keysight E4982A Troubleshooting Manual

To Check the Touch Panel

To Check the LCD

LCR Meter
• 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.
Procedure
Step 1.
Press
Step 2.
Click Service - Display Test. The whole LCD screen
turns RED.
Step 3.
Tap anywhere on the LCD to go through the color
test screen of RED, GREEN, BLUE, WHITE and BLACK. You
can also use the rotary knob turned clockwise or press the
ENTRY keys on the E4982A front panel.
If the color test screen does not appear, perform Step 4.
Step 3.
Connect an external VGA monitor to the External
Monitor Output Port on the E4982A rear panel.
key.
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Troubleshooting
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