Question about Boss Klash K780 Car Audio Amplifier

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Kdc-mp532u no display

I opened the face and there is a burn mark on the lower left side of display , is the display bad ,or is this the same problem everyone else is having with a bad solder joint in the unit

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A burn mark is not good

Posted on Sep 10, 2009

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I have a Kenwood KDC MP532U. The face plate will not display.


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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,

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No display on my kenwood kdc-mp532u


I read up on this and saw Tech48's post related to a different model. He's the one who deserves the credit. I'm just the rookie who has the soldering iron. However, here's a picture of the 5 resistors that you need to reflow and "top up"

My model is the KDC-MP532U (same as the 532, but with the USB option).

Here's the overall view. The CD-Player is standing on its edge at the bottom. The resistors are on the bottom right by the brass screw post.

81d7a18.jpg

...and here's a close up of the board and the resistors....

f84a560.jpg

Hope it helps. Thanks Tech48!!!! It's like I've got a new stereo!!

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