Agilent Technologies 35670-90066 To troubleshoot the power supply, Set the power switch to on l

Agilent 35670A	Troubleshooting the Analyzer
	To troubleshoot the power supply

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.

G	• Set the power switch to off ( O ).
	• Disconnect the ribbon cable from the A98 Power Supply assembly.
	• Set the power switch to on ( l ).
	• If the green power supply LED is not lit, the A98 Power Supply assembly is
	probably faulty.
	• Set the power switch to off ( O ).
	• Reconnect the ribbon cable to the Power Supply assembly.
	• Set the power switch to on ( l ).
	• 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.

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