70 N9030B PXA Signal Analyzer Service Guide
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
6. Referring to Figure 2-8, verify that the red +12VD LED is off.
Figure 2-8 A7 Midplane Board +12VD LED/Test Point 503
Is the red +12VD backlight supply voltage fault LED off?
If yes:
Proceed to step 7.
If not:
Replace the A6 Power Supply assembly.
7. With the instrument turned off remove the screws that attach the front
panel assembly to the instrument chassis.
8. Without disconnecting any of the cables carefully lay the front panel
assembly face down on the work surface.
9. Referring to Figure 2-9, verify the 3 voltage levels listed in Table 2-2 are
correct.
The instrument does have a screen saver which can disable the display
backlight after a predefined period of time. If there is any question as to
whether or not this has been set by the user prior to the current failure,
and the “Inverter Enable” voltage measures too low, press a front panel
key and see if the voltage level increases to the expected level.
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