Troubleshooting and Repair Methodology
3-2 Troubleshooting
Troubleshooting and Repair Methodology
Following are the major topics covered:
Methodology Overview
We recommend using the methodology described below to isolate and repair
problems with the M4735A. Each of these steps is explained in detail in the
pages that follow.
Evaluate
This initial phase of the service call involves evaluating the operation of the
M4735A and identifying problems. This is typically a broad search for infor-
mation, with the goal being to find all useful “clues”, not to pinpoint a cause.
At the end of this phase the problem(s) have been identified.
Troubleshoot
This phase of the service call begins by identifying a wide range possible
causes for the problems observed. The work then becomes more focused,
performing additional tests as needed to eliminate or prove the possible
causes. At the end of this phase the cause(s) of the problem(s) are known.
Repair
Having identified the causes, focus now shifts to repairing those causes by
replacing subassemblies as needed. At the end of this phase the unit is reas-
sembled and working, and ready to be tested.
Verify
This final phase of the service call involves performing the appropriate level
of Performance Verification testing, and documenting the results. At the end
of this phase the unit is verified to be working correctly and can be returned to
service.
Section Page
Methodology Overview 3-2
Evaluate 3-3
Troubleshoot 3-5
Repair 3-6
Verify 3-7
To Next Page
Loading...
