4535 612 10261 HD11 Service Manual Page 174
CSIP Level 1 Troubleshooting: All Troubleshooting Starts Here
• If you haven’t already, verify that all system voltages are present and within tolerance.
• Conduct tests from Section 6, “Performance Tests” as required to determine if and how the
system is failing.
Developing a
Solution
When think you know what the problem is, decide what changes you need to make to correct
the problem and write down the steps you want to take to make the repair, especially if the
sequence of your actions is important. Even if you don’t think you need to do this for yourself, it
can be useful to others when you properly document the problem and its resolution. You may
benefit from this yourself in the future.
Implementing a
Solution
Implement your solution by performing the corrective actions you developed. Proceed cau-
tiously and systematically. Make only one change at a time, and verify that the change you made
brings about the result you expected before making any other change.
It is not unusual for another problem to surface when you are applying changes to fix what you
thought was the problem. If the change didn’t bring about the result you expected, consider if
that unexpected result brings you closer to the actual cause of the problem. If it doesn’t, con-
sider returning the system to the known condition it was in before your last change and verify its
condition before proceeding.
Review your solution and any “discovery” that your change produced. Decide if you should pro-
ceed with your original solution or go back to investigating and testing. To avoid producing con-
fusing and conflicting data, do not deviate too far from the methodical approach that allows you
to isolate the failure by eliminating possible causes along the way.
To Next Page
Loading...