Agilent Technologies 35670-90066 manual A6 Digital A5 Analog A2 Input optional A1/A2 Input

Troubleshooting the Analyzer	Agilent 35670A
To troubleshoot the power supply

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Step 2. Determine if the Digital, Analog, or Input assemblies are causing the Power Supply assembly to shut down.

•Set the power switch to off ( O ).

•Pull the following assemblies out of the card nest about 1 inch:

A6 Digital

A5 Analog

A2 Input (optional)

A1/A2 Input

•Set the power switch to on ( l ).

•If the power supply LED is still off, set the power switch to off ( O ), reconnect the above assemblies, and go to Step 4.

Step 3. Repeat the following until the assembly causing the Power Supply assembly to shut down is located.

•Set the power switch to off ( O ).

•Reconnect one assembly at a time in the following order.

A6 Digital

A5 Analog

A2 Input (optional)

A1/A2 Input

•Set the power switch to on ( l ).

•If the green power supply LED is off, the assembly just reconnected is probably faulty.

The A5 Analog assembly provides over-temperature protection which shuts down the power supply if the analyzer’s internal temperature becomes excessive. Before replacing the A5 Analog assembly, check that the fan is turning when the green power supply LED is on and that the air flow is not restricted (cooling air enters from the right side and exhausts through the left side and rear panel). Since the fan is very quiet, check air flow to determine that the fan is turning.

Step 4. Determine if the CPU assembly or one of the assemblies connected to the CPU assembly is causing the power supply to shut down.

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