A clear image in just machines , but with the use of time and become increasingly blurred ;

2 , in use occasionally blurred image , but you can quickly return to normal , but the use of a few days or a few months more and more serious , more frequent.

 

Understand the point of failure errors:

 

Some people think that such failure is part of the problem circuit monitors the line - could be line pipe, poor thermal stability flyback diodes, capacitors and other components of the inverse process or due to Weld. These perceptions can be said to be completely wrong, because none of these elements can affect whether or not a clear image.

 

Cause and Countermeasures :

 

The real point of failure category 1 symptom is usually due to the aging of the focusing knob ignition coil pole , you may first try to replace an ignition coil . Of course, if the first display has been used for more than six years , then we have to take into account the aging of the picture tube possibilities . In addition , once the author is a professor repair a machine of this failure phenomenon turned out to be a teach digital CRT tube holder and large-area video amplifier board leakage phenomenon caused by the presence of copper cathode (after analysis of such designs after the problem ) , so sometimes caught in the maintenance of a genuine dilemma replaceable socket try. For category 2 symptom , it is usually not high quality CRT Sockets caused you to solve the problem by replacing the new one.