Keysight 9000 Series Service Manual page 57

2 If the oscilloscope shuts down without you pressing the front panel power button, unplug the AC power
cord from the rear of the instrument and wait 20 to 30 seconds. Then plug the AC power cord back into
the oscilloscope and press the front panel power button (or you can perform a hard shutdown by holding
the power button down for 5-6 second so the power turns off and then pressing the power button again
to restart the oscilloscope). If it shuts down again, look through the rear fan slots to see the upper right
corner of the acquisition board (as viewed from the rear of the oscilloscope). A series of LEDs is located
in this corner of the acquisition board. Refer to the Power Supply Trouble Isolation section (page 60)
of this chapter for more information on decoding these LEDs.
Figure 3
3 Once the oscilloscope will remain powered up, run the oscilloscope self-tests.
If any of the self tests fail, go to the Acquisition Trouble Isolation troubleshooting flowchart later in this
chapter for further troubleshooting. Otherwise, go to step D.
4 Check the front panel response by running the Keyboard and LED self tests.
Use this procedure to verify correct keyboard operation.
A new window appears with a symbolic representation of the keyboard. See Figure 4.
Chapter 4: Troubleshooting
1 Select Self Test from the Utilities menu (these are discussed in detail starting on page 73).
2 Select Scope Self Tests from the Self Test drop down list box.
3 Click the Start Test button and follow the instructions on the screen.
1 Select Self Test from the Utilities menu.
2 Select Keyboard Test from the Self Test drop down list box, then click Start.
Primary Trouble Isolation
Look through these
slots and the fans
located behind
them to see the
upper right corner
of the acquisition
board.
57