To Check The Touch Panel; To Check The Lcd - Agilent Technologies E5052A Service Manual

Troubleshooting
Function Specific Troubleshooting
Figure 4-22 Key code and key name display example
Step 5. To exit the front panel test, press
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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.
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To Check the LCD

Procedure
Step 1. Press
Step 2. Click
Step 3. Click
White and Black every 2 seconds and returns to the measurement view. If the color test
screen doesn't appear correctly, perform step 4.
Step 4. Connect an external VGA monitor to the VIDEO output port on the E5052A rear panel.
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104
If multiple keys fail to work, a problem in A22 front panel keyboard or A21 PCI DSP
card is suspected. Also check the flat cable between the A21 and A22.
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 A22 board involving the RPG.
If the touch panel doesn't work correctly whereas the hardkeys function normally, a
failure seems in the touch screen controller assembly (5183-4184) or touch-panel LCD
assembly (E5070-60102). (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 A20 digital motherboard.
If no problem is found in the above checks, a failure in the A20 digital motherboard is
suspected.
key.
Service Menu and, then,
in the test menu. The whole of the LCD screen turns Red, Green, Blue,
Display Test
If the monitor screen view is the same as the LCD display, the problem seems in the
A20 board.
If only the LCD display has a problem, check the flat cable between the A22 front
panel keyboard and A31 LCD connector.
If the LCD is not illuminated with backlight, check A52 inverter board and the cable
key three times.
Test Menu in the softkeys menu.
Chapter 4