Question about Kenwood KDC-X590 CD Player

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Display on Kenwood Out

What a wonderful thing to see posted, when I saw your solution. I have opened my headunit in the past suspecting the problem was internal. Do you know if the KDC-MP532U is basically the same in regards to the bad solder joints?

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  • Scott Chew Jul 01, 2008

    Dave

    Yes I am sorry about the vague reference, seems I get confused navigating the FIX-YA site, but yes it was in regards to the Kenwood displays going dark. I was also wrong about the model I have which is the KDC-MP632U and not the 532U, but the resistors were in fact where you said they were.



    Funny that when I was fixing mine and my wife's identical head unit that there was one resistor that had one side loose. When I touched the hot iron to one side the resistor moved meaning the opposite side was loose. They both had this exact problem.



    In Kenwood's defense they offered to fix both out of warranty, but driving around without a radio for even a week would lead to insanity. It took a while, but finally you offeren a solution to this problem. I guess mine failed early, middle of last summer and my wife's about 3 months ago, which meant I had to wait for other owners to experience the same display problem and start posting.



    Thanks again. I really get a lot of satisfaction when I can fix something myself with a little direction from someone like yourself. I fixed them both yesterday, but I was still smiling when I turned the key this morning and watched the display scroll on.



    Scott

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I am not sure exactly what solution you are reffering to, but the KDC-MP532U has a problem with the display going out that is the result of heat stressed solder on the main board. The surface mount resistors that are located on the right side near the front of the unit, as you look into it with the display facing you, are the culprits. This is common in about 3 or 4 Kenwood models. These surface mount resistors are on the top of the board, so the board doesn't need to be taken out to fix it. Just the CD mech does. The surface mount resistors just need the solder reflowed, an easy enough job if you know how to solder. They are all lined up connected to each other, I don't remember the reference numbers, but if you can recognize what a surface mount resistor looks like, you should be able to find them very easy.

Thanks for the compliment on the other post, it is appreciated. A good rating would also be appreciated.

Thanks and good luck,

Dave

Posted on Jun 30, 2008

  • Dave DeGain
    Dave DeGain Jul 01, 2008

    Hi Scott,



    That's great, even I get satisfaction when I can help somebody else. It's the only reason for me to be on this site. You would have gotten that answer much sooner had I known this site was here. I just started here less than 2 weeks ago.



    By the way, the resistor that moved when you touched it with the hot iron, actually was connected on both sides. The heat from the side you touched transfered to the other side and melted that solder also. It happens to me on occasion as well. It is something that you must be careful about when soldering. Too much heat can damage a component if the iron is left the lead too long. The surface mount resistors are not as prone to this type of damage, but IC's are, so if you solder them, only use the amount of heat needed to melt the solder and don't leave the iron on it any longer than needed to get the job done.



    Congrats on fixing this yourself, you are one step ahead of most people. Soldering may seem very easy to you, but you would be surprised at how many technicians I run into that have really bad soldering skills. Having the right "touch" really helps!!!



    I am happy to help, so if you ever need me you know where to find me.



    Thanks for the "FixYa" rating, it was appreciated.



    Dave

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Thanks tech48! I had the same problem, fixed it today on my kdc-mp532u. As you described, I just had to resolder the five resistors on the front right of the headunit (not the faceplate/display part). There are five surface-mount resistors connected in series, each resistor 2.7kOhms in value. You can use an ohmeter in the two vias that the resistor-network is connected to, and make sure it adds up to about 14kOhms.

Posted on Jun 04, 2009

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