Agilent Technologies 89410A Service Manual page 21

Troubleshooting the Analyzer
Troubleshooting the Analyzer
This chapter contains troubleshooting tests that can isolate most failures
to the faulty assembly. The section ''How to troubleshoot the analyzer''
tells you which test to start with based on the failure. The test you start
with will either isolate the faulty assembly or send you to another test to
continue troubleshooting.
Safety Considerations
The Agilent 89410A DC-10 MHz Vector Signal Analyzer is a Safety Class 1
instrument (provided with a protective earth terminal). Although the
instrument has been designed in accordance with international safety
standards, this manual contains information, cautions, and warnings
that must be followed to ensure safe operation and retain the instrument
in safe operating condition. Service must be performed by trained
service personnel who are aware of the hazards involved (such as fire
and electrical shock).
WARNING:
Any interruption of the protective (grounding) conductor inside or
outside the analyzer, or disconnection of the protective earth terminal can expose
operators to potentially dangerous voltages.
An operator should not remove any covers, screws, shields or in any other way
access the interior of the Agilent 89410A DC-10 MHz Vector Signal Analyzer unless
instructed by an option installation note. There are no operator controls inside the
analyzer.
Only fuses with the required current rating and of the specified type should be used
for replacement. The use of repaired fuses or short circuiting the fuse holder is not
permitted. Whenever it is likely that the protection offered by the fuse has been
impaired, the analyzer must be made inoperative and secured against any
unintended operation.
When power is removed from the Agilent 89410A DC-10 MHz Vector Signal
Analyzer, +11000 volts are present in the CRT for approximately 3 seconds. Be
extremely careful when working in proximity to this area during this time. The
high voltage can cause serious personal injury if contacted.
1-3