Agilent Technologies 89410A Service Guide

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Troubleshooting the Analyzer
To troubleshoot front-end control failures
2 Check front-end control loop signals.
a Place the analyzer on the side closest to the display.
b Remove the bottom cover.
c Press the following keys:
[Return]
[
loop mode setup]
[
forever]
[
Return]
[
functional tests]
[
power-up tests]
[
more]
[
additional hardware]
d Using a logic probe, check that the TTL signals listed in the
following table are toggling.
e If a signal is incorrect, replace the probable faulty assembly.
f
Press [Preset] to stop the loop mode.
Probing the signals on the motherboard may cause the self test to
fail or abort.
g If the signals are correct in the previous table, go to the next test,
‘’To troubleshoot source and calibrator out failures.’’
Test Location Signal Name Probable Faulty Assembly
A91 P6 pin 16 FSA1 A60 Frequency Reference
A91 P6 pin 10 CLK25M A60 Frequency Reference
A91 J4 pin 18A FECLK1 A30 Digital Source
A91 J5 pin 18A FECLK2 A30 Digital Source
A91 J6 pin 19B FECLK3 A30 Digital Source
A91 J2 pin 29A FEDATA A30 Digital Source
A91 J2 pin 30A nFEPROG A30 Digital Source
A91 J2 pin 30B FELATCH A30 Digital Source
A91 J2 pin 28B FELOOP1 A21 A/D Converter
A91 J4 pin 17B FERET1 A10 Analog Input
A91 P1 pin 43 FELOOP3 A36 Trigger
A91 J6 pin 18B FERET3 A35 Analog Source

Agilent Technologies 89410A Specifications

General

Brand	Agilent Technologies
Model	89410A
Category	Measuring Instruments
Language	English