Agilent Technologies 35670-90066 manual To troubleshoot intermittent failures

Caution

Troubleshooting the Analyzer	Agilent 35670A
To troubleshoot intermittent failures

To troubleshoot intermittent failures

Use this test to isolate intermittent failures to the assembly.

•Determine if your intermittent failure is caused by one of the following common causes.

Common Reasons	Troubleshooting Procedure
Loose screws	Check that the screws in the analyzer are tight and that the cables are
and cables	firmly in their sockets. This is especially important since grounding for
	the analyzer depends on the cables and screws.
Motherboard	Remove each assembly connected to the Motherboard and check the
connectors	connectors for loose or bent pins.
Power supply	Check for correct power-supply voltages. See ‘’To perform initial
voltages	verification’’ on page 4-5.
Out-of-adjustment	Do the adjustments for the analyzer in chapter 5.
Low level noise	Do ‘’To troubleshoot distortion failures’’ on page 4-56.
Air flow	Cooling air enters from the right side and exhausts through the left side
restricted	and rear panel. Check that the air flow was not restricted in these areas
	when the failure occurred.
External voltage	Verify that the line voltage is within the electrical specification for the
	analyzer. See chapter 2.

•Connect the rear panel SOURCE output to the rear panel TACH input using a BNC cable. Remove all cables from the front panel input connectors.

The ICP self test outputs approximately 30 Vdc on the input connectors. Before starting the self tests, disconnect all devices connected to the input connectors. Devices left connected during the ICP self test may be damaged.

•Set the power switch to on ( l ).

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