To Troubleshoot Fast Bus Failures - Agilent Technologies 35670A Service Manual

Agilent 35670A

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 (
• Set the power switch to on (
The screen displays
• 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
64, 114, 65, 115, 66
72
74
112
119
123
124
7-11, 21-45, 59, 71, 109,
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.
).
O
) while holding in the [
l
Fast Bus Diagnostic Test ...
Signal Name
FA1 to FA5
ECLK
FSELAn
BRESETn
FRW
FIFOENn
FSELSn
GND
Troubleshooting the Analyzer
To troubleshoot fast bus failures
System Utility
and the power-on LEDs are flashing.
TTL Logic State In Test Mode
Toggling
Toggling
Toggling
Low
Toggling
High
Toggling
Low
] key.
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