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Chapter 4: Calibrating and Adjusting
To check the power supply
4–4
To check the power supply
There are no adjustments for the supply. Perform this procedure only if you suspect a power
supply problem.
Equipment Required
Procedure
1
Disconnect the oscilloscope power cord and remove the cover.
If necessary, refer to the procedures in chapter 6, “Replacing Assemblies.”
WARNING INJURY CAN RESULT!
Use care when working around the oscilloscope with the cover off and power applied. The fan
blades are exposed and could cause injury; also, there is approximately 900 V generated by the
backlight inverter for the flat-panel display.
2
Connect the oscilloscope power cord and set power switch to ON.
3 Refer to the following figure for testpoint locations.
Figure 4-1
Power Supply Test Points
Equipment Critical Specifications Recommended Model/Part
Digital Voltmeter Accuracy ±0.05% Agilent 34401A