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To troubleshoot the power supply
Use this test to check the Power Supply and Fan assemblies. This test can also isolate
the assembly causing the Power Supply to shut down.
Step 1. Check the power supply LED.
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Set the power switch to off ( O ).
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Disconnect the ribbon cable from the A98 Power Supply assembly.
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Set the power switch to on ( l ).
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If the green power supply LED is not lit, the A98 Power Supply assembly is
probably faulty.
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Set the power switch to off ( O ).
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Reconnect the ribbon cable to the Power Supply assembly.
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Set the power switch to on ( l ).
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If the power supply LED is on but the fan is not turning, go to Step 7.
A thermistor on the A10 Rear Panel assembly controls the power to the A90 Fan
assembly. As the analyzer’s temperature increases, the fan speed increases. Since
the fan is very quiet, check air flow before determining that the fan is not turning.
Agilent 35670A Troubleshooting the Analyzer
To troubleshoot the power supply
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