Troubleshooting Overview - Keysight Technologies 90000 A Series Service Manual

4
Troubleshooting

Troubleshooting Overview

The service strategy for troubleshooting Infiniium 90000 A-Series oscilloscopes is
to isolate problems to a faulty assembly, then use the disassembly and assembly
procedures in
assembly.
Read the For Your Safety booklet before servicing the oscilloscope. Before
performing any procedure, review it for any cautions and warnings.
The only equipment you need for troubleshooting to the assembly level is basic
electronic troubleshooting tools such as a digital multimeter. If you need to
remove and replace any assemblies, refer to
A default setup is provided to return the oscilloscope to a known state. You can
use the default setup to undo previous setups so they do not interfere with the
current measurement. Use the default setup when a procedure requires it by
pressing [Defaul t Setup] on the front panel.
INJURY CAN RESULT! Use caution when the oscilloscope fan blades are exposed as
WARNING
they can cause injury. If the procedure allows, replace the cover over the chassis
(without screwing it back in place) before turning the oscilloscope on.
AVOID ESD DAMAGE TO COMPONENTS! Electrostatic discharge (ESD) can damage electronic
CAUTION
components. Use proper ESD precautions when doing any of the procedures in this chapter. Failure to
follow proper ESD procedures may cause immediate failure or latent damage. Latent damage may result
in equipment failure after a period of time. As a minimum, place the oscilloscope on a properly
grounded ESD mat and wear a properly grounded ESD strap.
SHOCK HAZARD! Maintenance should be performed by trained service personnel.
WARNING
Lack of training and awareness could resul t in electrical shock or other injury. When
maintenance can be performed without power applied, the power cord should be
removed from the oscilloscope.
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Chapter 5, "Replacing Assemblies, to replace the defective
Chapter 5, "Replacing Assemblies".
90000 A-Series Service Guide