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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Philips TV 14GX8510--tda3653b keeps blowing and led blinking
When i plug for the first time it was dead tv and led blinking. So, i
replaced vert ic TDA3653B (ic7400). Then i turn on and it was ok.After threee days TDA3653b blows again. Then i replaced again. Now it lasted just one day. What's going on? I checked diodes and caps around vert ic and they were ok. Any ideas? Thanks. |
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#2
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Replace the diode and caps associated with the vertical circuit
and make sure the TDA has clean heat compound on it. kip wrote in message oups.com... When i plug for the first time it was dead tv and led blinking. So, i replaced vert ic TDA3653B (ic7400). Then i turn on and it was ok.After threee days TDA3653b blows again. Then i replaced again. Now it lasted just one day. What's going on? I checked diodes and caps around vert ic and they were ok. Any ideas? Thanks. |
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#3
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Have you checked the esr in the electrolityc capacitors near the TDA or
measured the capacity. An electrolityc can have enough capacity, but an bad esr (internal resistance) can damage the circuit. Greetings PP schreef in bericht oups.com... When i plug for the first time it was dead tv and led blinking. So, i replaced vert ic TDA3653B (ic7400). Then i turn on and it was ok.After threee days TDA3653b blows again. Then i replaced again. Now it lasted just one day. What's going on? I checked diodes and caps around vert ic and they were ok. Any ideas? Thanks. |
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