ELECTRONICS TROUBLESHOOTING

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Gates Troubleshooting (Logic Analyzer Timing Display Format)

 

QA marks the first valid count after system initialization.
Note the gray dashed marker line in the fourth QA pulse. Use this line as reference marker.


Baseline (No fault operation)

 

QA marks the first valid count after system initialization.
Note the gray dashed marker line in the fourth QA pulse. Use this line as reference marker.


Fault 1: Isolate fault from timing diagram.

 

QA marks the first valid count after system initialization.
Note the gray dashed marker line in the fourth QA pulse. Use this line as reference marker.


Fault 2: Isolate fault from timing diagram.

 

 

Fault 1 Answer Below.

 

 

 

Fault 1 Answer Below.

 

 

 

 

 

Fault 1 Answer AND gate G2, QC high.

 

 

Fault 2 Answer Below.

 

 

Fault 2 Answer Below.

 

 

 

 

Fault 2  Answer: XOR gate G5, QB high