BASIC STEPS IN FAULT FINDING IN ELECTRONICS

I want to write briefly on basic steps in fault finding in our electronics

COLLECTION OF EVIDENCE: Collecting evidence from the user of emphasis must be much relevance to the problem rather than a quantity otherwise there is a danger of moving of essential case in the mass correlated information.
ANALYSIS OF EVIDENCE: After collection of evidence, it should be tested into groups in other to expose any inconsistence which may be presented. It is here that the devoting time to logical thoughts will save time overall.
LOCATION OF FAULTS: General questions which may narrow the areas of possible failure e.g. If there is no sound from the radio sequence, confirmation is needed that fault actually lies in the speaker before it is condemned;

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Fault Location involves:
I. Identify the stage or area that contains the fault.
II. Identify the instrument or component which caused the fault. There may be occasion where a symptoms identified of faults and related cause e.g. a wire disconnected from a terminal is an obvious reason for an open circuit and lengthy faults procedures are not necessarily.
DETERMINATION AND REMOVAL OF CASE: An important step, e.g. a burnt item in a set cause by short-circuit rectifier diode, the first line of item must be identified and replaced all these will be in line if the primary cause of the fault is not removed or changed.
RECTIFICATION OF FAULTS: From a simple adjustment of a screw to the replacement of some major parts of process fault may require maintenance of major of (module) of the equipment.

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CHECKING OF THE SYSTEM: There may be more than one fault checking of the system must always be carried out because adjustment to are stage or part may be well produce side effects elsewhere.

Thank you.