Question about Nakamichi Audio Players & Recorders

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While playing a CD, my Nakamichi Receiver 2 made a ''pop'' noise and lost the signal, with some smoke coming from the top vent near the front. It was in a confined area, and I believe it overheated and ''blew a circuit.'' I unplugged it but in later plugging it back in get a flashing power indicator light, the cd/tuner/cassette indicator light still works, but no sound. I would appreciate thoughts on nature of problem and cost of repair.

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The output section has a problem. The receiver is in "protect" mode and wioll not turn on the speakers. This unit needs service. In all likelyhood, one or more of the output transistors has shorted and hte smoke came from a resistor that fried. This is a relatively simple repair for an audio repair shop. Figure around $40 for parts for this repair.

Dan

Posted on Oct 05, 2009

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From the initial posting of this question. (Please only update one.)

There is a switching IC inside this unit that may be the problem, but without seeing the actual unit and signal tracing, this will be near impossible to diagnose. If you have an oscilloscope, place an input signal on one of the inputs and trace the signal to the IC. It will be a TA9263 or something similar. You should see the signal on 2,4 or 6 pins. If you see the signal only on 2, then the IC is likely to be defective.

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