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Kenwood KR-A4070 blowing 5a 125v fuses

Radio was playing fine, and all at once stoped playing. Power trans seems to be working, will click on and off. I pulled top cover found a 5amp-125v fuse blown. Replaced fuse, but still blowes at plug in. Stand-by light still works, but have no sign of power on front panel. Why'll looking for any visual problems found a ceramic resistor/or what looks to be a resistor with crackes. (mpr 33d 0.22ohmkx2 YOUHYUN) This are the numbers that are on the part with the cracks in it.

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  • rzrfreefr
    rzrfreefr Aug 05, 2013

    can you show a picture of where is it ? I have the same effects on KenWood KRF-V4550D

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I am guessing that the ceramic resistor is close to the output transistors. I would also guess that one or more of the output transistors has shorted. This causes a high current draw that is blowing the fuse. You could also have a power supply problem. The ceramic resistor is a .22ohm dual emitter resistor that is used in the output stage. The transistors located close by are probably shorted and should be replaced. Start there and let us know what happens once the transistors and the resistor are changed.

Dan

Posted on Oct 10, 2008

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