Question about Kenwood KSC-310CCS Center Channel Speaker Car Speaker

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I have kenwood car stereo.it shows protect mode..soo what is the main problem? wand what is the solution? pls help

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Hi, the unit enters protect mode when the output impedance is too low causing the power transistors to draw too much current. A short may be internal or external to the head unit. The thing to do is first disconnect the speakers to see if the unit will come out of protect. If this does not work, the short is internal, and the head unit must be repaired or replaced. If disconnecting the speakers DOES resolve the short, then the speakers and wiring must be checked for a short. The easiest way to do this is to use an ohmmeter at the speaker connector. Check the impedance of each pair of speaker wires. The impedance should be between 4-8 ohms. Anything less than 4 ohms may cause the unit to protect, depending on the exact design of the unit. If you find any wire pairs to have less resistance than the others, access the speaker to check the impedance of the speaker alone. If the speaker has an impedance of 4-8 ohms, the problem is a shorted wire. Please let me know if you have questions, and thanks for using FixYa.

Posted on Mar 20, 2011

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Kenwood head units show "protect" when there's a problem with the speaker outputs. This might mean a shorted speaker wire, a blown speaker, or an internal defect in the head unit. Once the condition that's causing the "protect" mode is fixed, the CD player should be back in normal mode the next time you turn it on.

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If it works with a single speaker connected, keep re-connecting the others until you identify the speaker that's causing the problem. There may be a wiring problem or defective speaker in that location.

If it displays "protect" with a single speaker connected, then disconnect that one and try a different one. If all the speakers cause a "protect" mode, then you're probably back to a defective head unit, unless your friend managed to blow all your speakers at once.

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