Keysight Technologies Infiniium 90000A Series, Service Manual

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48 90000 A-Series Service Guide
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 Chapter 5 , “Replacing Assemblies, to replace the defective
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 Chapter 5 , “Replacing Assemblies”.
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 [Default Setup] on the front panel.
WARNING
INJURY CAN RESULT! Use caution when the oscilloscope fan blades are exposed as
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.
CAUTION
AVOID ESD DAMAGE TO COMPONENTS! Electrostatic discharge (ESD) can damage electronic
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
.
WARNING
SHOCK HAZARD! Maintenance should be performed by trained service personnel.
Lack of training and awareness could result in electrical shock or other injury. When
maintenance can be performed without power applied, the power cord should be
removed from the oscilloscope.