Agilent Technologies 89410A Service Manual page 63

5
Check the HPIB controller on the A42 Memory assembly.
a
Press the following keys:
]
[System Utility
[ ]
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[ diagnostics ]
[ functional tests ]
[ I/O ]
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HPIB controller
b If the HPIB controller test fails, the A42 Memory assembly is
probably faulty.
6
Check the oven fuse on the A95 Main Power Supply assembly.
a Set the power switch to off ( O ).
b Turn the analyzer upside down.
c
Remove the bottom cover.
d
Wait five minutes to allow time for the power supply capacitors to
discharge.
e Remove the black power supply shield.
f
Measure the resistance across F357.
g
If the resistance is 0
h If the resistance was greater than 0
Ω
, the A85 Oven assembly is probably faulty.
Ω
, replace the fuse.
Troubleshooting the Analyzer
To perform self tests
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