Question about Kenwood KDC-MP528 CD Player

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Kenwood KDC-MP528 Everything was fine one day and the next it will not recognize the CD. It skips by it when you toggle through. They may be one in the CD player but will not eject. It's like the CD does not exist

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This is a pretty tough problem to give any answer with complete certainty.

I work at an authorized kenwood service center and it is rare that I see one with this particular problem. I fix about 5 to 10 kenwoods every week.

Since it does not recognise the cd player at all, it could be the one of the supply voltages that feed the cd deck.

It has 3 different supplies for the cd player.

On pin 2 of the connector is the first one I would suspect, it is around 8 volts. If that is missing there are 3 components I would look at. The first one is D5. It is a 8.2 volt zener diode. This is one that could be shorted and if it is the cd deck may not be recognized.

The next 2 components I would check would be Q9 and Q10.
If one of those are open or shorted you will get the same problem. Q9 is a 2SB1443 and Q10 is 2SC4081

if you plan on troubleshootng it yourself, I will post the other data for the other 2 supplies after you reply back.

In any case, I don't think that this is a problem that anybody can fix without some serious electronic troubleshooting.
sorry to say, there is no easy fix on this one.

Hope this was some help

Posted on Jun 20, 2008

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