When the Fault is Found
Determine the cause of the fault. If the problem is a failed component, determine the
cause of failure before replacing the failed component. Replacing a burned-out resistor
that was damaged by a shorted transistor will only consume more resistors until the
shorted transistor is replaced. Correct the problem, and test the device for proper operation.
Review the entire troubleshooting and repair process. Look back at ways in which
the problems were found and corrected.
● Were there symptoms that you ignored but that actually would have helped you to find
the problem sooner?
● Given similar symptoms, could you find the problem sooner next time?
With the device operating correctly, measure voltages and signals at critical points in the
instrument, and record the readings in the manual or on the schematic for future reference.
Review the entire process of troubleshooting and repair as a learning experience to find
out the things you did correctly and those things that you should do differently. Complete
the necessary paperwork to maintain accurate and complete records.