Question about Denon AVR-1400 Receiver

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Power don't turn on

There is a problem for this receiver. When I turn on the power switch on receiver, stanby lamp shortly blinks once, but receiver is still off. I searched forum site to fix this problem and common result was checking the protection circuit, mainly output transistor and the resistors, capacitors. When I opened the receiver, I couldn't discriminate the protection circuit. But I can discriminate the elements such as transistor (BJT/MOSFET), resistor, capacitor and so on. Which one is output transistor ? Could you let me know which part is protection part ? Then I can check whether the circuit is shorted or not by myself using multimeter. In addition, if any, could you give another cause for the problem ? Because the warranty is over, I have to fix it. I don't want to pass it away.

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Look for a large aluminum heat sink with the output transistors bolted to it. You should see anywhere from 4 or more large transistors bolted to it. I doubt that the protection circuit is malfunctioning. I would bet that it is doing exaclty what it is supposed to do. If you do find some bad output transistors, be sure to check all the components that work in conjunction with those transistors. Good luck.

Posted on Apr 09, 2007


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