Agilent Technologies E5071C, Service Manual

Page: 198 / 385

198 Chapter 4
Troubleshooting
Function Specific Troubleshooting
To Check the Front Panel
Procedure
Randomly press the front panel keys and rotate the knob to verify that they work normally.
Step 1. Press key.
Step 2. Click
Service Menu
and, then,
Test Menu
in the softkeys.
Step 3. Click
Front Panel
in the test menu. This opens "Front Panel Test" dialog box as shown in
Figure 4-21.
Figure 4-21 Front Panel Test dialog box
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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 4-22. Turn the rotary knob clockwise or
counterclockwise. The dialog box indicates the direction of the turned knob and a count of
RPG output.
Figure 4-22 Key code and key name display example
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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 (5183-4184) or touch-panel LCD
assembly (E5070-60112). (The touch panel is not replaceable independently of the
LCD.)