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Model kdc-mp438u "protect" shows up on the screen when powered up

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This indicates that a problem has been found in the final output stage of the amplifier. The amp stays off to prevent further damage. Remove all of the speaker wires and try again. If the protect message remains, the problem is within the amp and th amp will need service. If you are able, check the output transistors for a shorted condition as that is the most common failure part.

Keep us posted.
Dan

Posted on Apr 23, 2008

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Good luck and kind regards.

Thank you for using FixYa.

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