Specifications

Chapter 4: Troubleshooting
Primary Trouble Isolation
50
The Front Panel LED Test screen appears, showing a symbolic representation of all
front panel LED indicators. See Figure 4- 4.
Figure 4-4 LED test screen
3 Repeatedly press the [Single] button on the front panel to step through and
highlight each LED symbol in the test screen. You can also step through the
LEDs by pressing the << Prev or Next >> buttons on the screen. Verify that the
corresponding LEDs on the front panel are the only ones illuminated.
Additionally, pressing the [Multi Purpose] button on the front panel will illuminate
all the LEDs, and pressing the [Clear Display] button on the front panel will turn
off all the LEDs.
4 When you are finished, click Close.
5 If any of the LEDs do not work, go to “LED Troubleshooting” later in this chapter.
6 If the touch screen is not working properly, go to the “Touch Screen
Troubleshooting” section of this chapter.
7 If the oscillator board is not working properly, go to “Oscillator Board
Troubleshooting” in this chapter.
8 To check power outputs of the probes, go to “Checking Probe Power Outputs”
in this chapter.