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Hi , I just brought a KD-G646 head unit and it wont play cd's at all. The radio works fine, but the usb only works if the unit is turned down. Could i have something wired wrong or is the unit faulty. It wont load cd's at all and makes a funny clicking noise when its trying to read cd's.

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Checked the voltage difference between the earth wire and the car battery and found that when the head unit was turned up , a voltage difference of up to 3 volts before the unit would cut out. Onec the unit cuts out the voltage drop was gone, until it rebots and trys to make sound again. It seemed to happen at volume settings of around 17-25. So all i needed to do to fix it was run a heavyer earth wire. The units obviously have a low voltage cut out, although it only cuts out for about .5 of a second or less.

Posted on Aug 20, 2008

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Well, the USB problem i cant help you with, but if the cd isnt loading, theres probably something wrong with the loading mechanism, which usually means that the unit is faulty. it would be more cost efficient to buy a new head unit than to pay someone for the parts and labor to repair the one you have.

Posted on Aug 20, 2008

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