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SAMSUNG CT14F3 I would like if you can help me to repair and send a diagram. the TV desnt turn on and the 4r5q turn very hot Apreciate your help Thanks again Luis Eduardo Quintero

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SOURCE: the 130 volts relay is

If the all said voltages are there and still the relay doesn't work check the transistor drive it and the relay itsef. Relays will have the voltage and its coil resistance marked on it. Check it coil resistance and be sure it comes to the marked Ohms. If has the proper Ohm resistance, check the transitor drives the relay for open [usually collector to emitter]. If the transistor used there is a PNP type, coltage at its base should be low, and if its an NPN type the voltage should be high inorder to drive the relay.
Check whether the base voltage of the said transistr varies, that is going up and down, during the power on and off switch on the remote control If there is no volgage change, the voltage remains constant all the time, check the power on off voltage chage at the respective pin in the system control Ic. If there is voltage changes and there is no voltage changes in the transitor said. means there are some trouble between the path, and check whether other drive transistors are used in between them. If so check it too. Ok.

Posted on Oct 27, 2010

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