Specifications

Chapter 4: Troubleshooting
Primary Trouble Isolation
48
A
Perform power-up.
Connect the oscilloscope power cord and press the power button in the lower left corner
of the front panel. If the oscilloscope is working properly, it will take several minutes
to start up. The LEDs on the front panel should all illuminate brightly for several
seconds, then dim. If the LEDs do not light up, refer to “LED Troubleshooting” later
in this chapter.
When the system is done starting up, the graticule will appear on the screen. The exact
appearance may look slightly different than shown in Figure 4- 2, depending on the
setup selected before the oscilloscope was turned off.
Figure 4-2 Power-on Display
If the oscilloscope turns off without you pressing the front panel power button, go to
the “Power Supply Troubleshooting” section of this chapter.
If the oscilloscope does not start up at all, unplug the oscilloscope, wait 30 seconds,
plug the oscilloscope back in, and turn the power on. If it still does not start up, go
to the “Setting Up the BIOS” and “Motherboard Verification” sections of this chapter.
B
Check the display.
If the screen is black or has a scrambled display, go to the “Display Troubleshooting”
section of this chapter.
If the display shows MEMCON1, MEMCON2, MEMCON3, or MEMCON4 errors during
boot- up of the oscilloscope software, the bottom (channel 1) acquisition board is faulty
and requires replacement. MEMCON5, MEMCON6, MEMCON7, and MEMCON8 errors
refer to the next higher acquisition board (channel 2). MEMCOM9 through MEMCON12
errors refer to the next higher (channel 3) acquisition board, and MEMCON13 through
MEMCON16 errors refer to the top acquisition board.
C
Run the oscilloscope self-tests.
1 Select Self Test from the Utilities menu.
2 Select Scope Self Test from the Self Test drop- down list box.
3 Click Start Test and follow the instructions on the screen.
If any of the self tests fail, go to the “Acquisition/Backplane Assembly Troubleshooting”
section of this chapter for further troubleshooting.