Agilent Technologies 35670-90066 manual To troubleshoot fast bus failures

Agilent 35670A	Troubleshooting the Analyzer
	To troubleshoot fast bus failures

To troubleshoot fast bus failures

Use this test to isolate Fast Bus failures to the A7 CPU assembly or A6 Digital assembly.

•Set the power switch to off ( O ).

•Set the power switch to on ( l ) while holding in the [ System Utility ] key.

The screen displays Fast Bus Diagnostic Test ... and the power-on LEDs are flashing.

•If the analyzer did not respond correctly, the A7 CPU assembly is probably faulty.

•Using a logic probe, check the following signals.

A7 P10 Pin	Signal Name	TTL Logic State In Test Mode
64, 114, 65, 115, 66	FA1 to FA5	Toggling
72	ECLK	Toggling
74	FSELAn	Toggling
112	BRESETn	Low
119	FRW	Toggling
123	FIFOENn	High
124	FSELSn	Toggling
7-11, 21-45, 59, 71, 109,	GND	Low
118, 120, 122, 147, 149

•If the signals are correct, the A6 Digital assembly is probably faulty.

•If any signal is incorrect, the A7 CPU assembly is probably faulty.

This is only a partial check of the fast bus signals between the A7 CPU assembly and the A6 Digital assembly.

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