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5–2
Troubleshooting
This section provides troubleshooting information for the Agilent Technologies
54835A/45A/46A oscilloscope. The service strategy of this instrument is replacement of
defective assemblies.
Safety
Read the Safety Summary at the front of this manual before servicing the instrument.
Before performing any procedure, review it for cautions and warnings.
WARNING SHOCK HAZARD!
Maintenance should be performed by trained service personnel aware of the hazards involved
(for example, fire and electric shock). Lack of training and awareness of the hazards could result
in electrical shock. When maintenance can be performed without power applied, the power cord
should be removed from the instrument.
WARNING INJURY CAN RESULT!
Use caution when working around the cooling fan with the cover removed from the instrument.
The cooling fan blades are exposed on one side and can be hazardous. Install the optional fan
safety shield (Agilent Technologies P/N 54801-00601) to protect your fingers from the fan blades.
Tools Required
You will need basic electronic troubleshooting tools, including a digital multimeter and
a 100-MHz oscilloscope. Performance verification tests have more stringent
requirements. See chapter 1 for the list of recommended test equipment.
If you need to remove and replace assemblies, you will need some of the hand tools listed
in chapter 6, “Replacing Assemblies.”
ESD Precautions
When using any of the procedures in this chapter, you should use proper ESD
precautions. As a minimum, you should place the instrument on a properly grounded
ESD mat and wear a properly grounded ESD wrist strap.
Keystroke Conventions
To guide you while setting up the oscilloscope, the following conventions are used to
represent keystrokes and other interactions with the instrument:
• When you need to issue a command through the graphical interface, the command
will be phrased like this: “Select <command> from the <menu name> menu.”
• When you need to click on an object on the graphical interface, the instructions will
be phrased something like this: “Click the OK button.”
• When you need to press a key, the instructions will be phrased something like this:
“Press the Run key.”