Logical Troubleshooting

1.Define the problem.

2.Check the system status.

3.Investigate the log book and system actual.

4.Ask yourself what was changed last.



7.Replace or fix part.

8.Document and review.

Even though many reliability improvements have been made over the last few years, there are still many things that can go wrong during routine operation. One must establish logical steps in troubleshooting problems or the task will become overwhelming.


Always ask: “What was the last thing changed?”

Experience has shown that there is about a 90% probability that the last thing changed is the key to the problem. For this reason, detailed system log books are invaluable. Record and date anything done to the system; from changing the gas cylinders to performing an ion source cleaning.

With so many things that can go wrong, how do we “logically” approach the task?

Using the eight (8) steps of the information funnel shown will “logically” focus on a solution.

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