Technical data

76 4000 X-Series Oscilloscopes Service Guide
4 Troubleshooting
To perform hardware self test
Pressing [Utility] > Service > Hardware Self Test performs a series
of internal procedures to verify that the oscilloscope is
operating properly.
It is recommended you run Hardware Self Test:
• After experiencing abnormal operation.
• For additional information to better describe an
oscilloscope failure.
• To verify proper operation after the oscilloscope has been
repaired.
Successfully passing Hardware Self Test does not guarantee
100% of the oscilloscope's functionality. Hardware Self Test
is designed to provide an 80% confidence level that the
oscilloscope is operating properly.
To perform front panel self test
Pressing [Utility] > Service > Front Panel Self Test lets you test the
front panel keys and knobs as well as the oscilloscope
display.
Follow the on- screen instructions.
Failures in the front panel self test indicate problems with
the keyboard, keypad, or display.