Question about Kenwood DPX-4030 CD / Cassette Player

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Kenwood kdc w534u

Very helpful post was able to fix my mates radio, this must be a common fault is that these resistors the board use a paste solder in the assemble process that’s why you get a dry joint, as suggested reflow the joints.

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Posted on Jan 02, 2017

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tech48
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SOURCE: Display on Kenwood Out

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

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2 Answers

My kenwood KDC-X590 car stereo has no illumination but radio and cd player works. Is something burned out? HELP!!


there are about 8 - 10 surface mount resistors inside of the deck that need to be resoldered. They are on the front right of the board with the face toward you.

Jul 29, 2012 | Kenwood KDC-X590 CD Player

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KDC-W534U, which type 2R7 resistor?


SOMETIMES THE LCD SCREEN IN UR DECKS JUST GO OUT HATE TO B THE BEARER OF BAD NEWS BUT SOUND S TO ME LIKE U R GONNA HAVE TO BUY A NEW DECK THAT SUCKS MAN

Feb 06, 2010 | Car Audio & Video

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


it more than likely has bad solder connections inside the radio on some surface mount resistors usually located on the right front of the radio as it faces you.

Sep 16, 2009 | Car Audio & Video

1 Answer

My kenwood head unit dislay has stopped workin what could be wrong ! Its a KDC-W534U


more than likely it has bad solder connections on some surface mount resistors inside the deck.

Jun 11, 2009 | Car Audio & Video

10 Answers

Kenwood KDC-X590 Faceplate display problem


Yes, the problem is inside the main unit. I have fixed hundreds of these radios over the years. 
The solder on these resistors get heat stressed and stop conducting properly. They just need a tiny little touch of solder. 
With the radio in front of you and the face is facing you, take the top off and remove the CD mech. The CD mech can just be set over to the left a little and the ribbon cable to it can stay connected. Just move it out of the way gently. You will see a series of resistors in the right front corner area of the main board on top. They have 2R7 printed on them and there are quiite a few, all in that main area. Just resolder them and put it all back together again and the display will work normal.
Dave

Jan 20, 2009 | Kenwood KDC-X590 CD Player

1 Answer

Kenwood KDC-MP232


This is a similar repair, but the resistors you need to reflow solder on ae on the bottom of the circuit board, not the top like the other models. The reference numbers for the resistors are R130, R131, R133, R135, R136, R137, R138, R139, R140, AND R141.

They are 4.7 ohm resistors and should have "4R7" printed on the top of them. They are not as close together as the other model has them, but if you take the board out of the unit you should be able to find them. Put just a touch of solder on both sides of each resistor. This should be plenty to fix this problem.

It is also possible that you may have another cause for this problem, but this is the most likely cause.

I hope this is some help for you. Let me know if you need further instructions.

Dave

Jan 04, 2009 | Kenwood KDC-MP232 CD Player

5 Answers

KDC-MP532U display blank


Solution from Tech48:

The problem is not the faceplate for any of you, it is inside the main unit. If you know how to solder, you can fix is very easy. First take the top off the unit, there is 1 screw in the back middle. Then take the CD player out. It has 2 screws holding it in at the front corners at the bottom of the CD deck. Use a number 2 phillips and take out the gold screws holding the CD deck in place. Then you can pull out the CD deck, and be careful not to damage the ribbon cable connected from the CD deck to the main board. The deck can just sit up and over to the left to get it out of the way for what needs to be soldered.
Look inside the main unit on the board and you will see in the front right corner a series of surface mount resistors all connected in series. Just reflow that solder on them with a small amount of new solder added and the display will once again work perfectly. That solder is very heat stressed, that is the problem. I have fixed dozens of these over the last few years. Make sure you put it back together the same as it came apart, and you are done.

Sep 19, 2008 | Kenwood KDC-MP532U

1 Answer

Kdc x590 display problem


There are a series of them in the right front corner (as you look at it from the front) of the main circuit board, on the top side of the board. You need to take the top panel off the radio and then remove the CD deck. Be careful removing the CD deck, it has a ribbon cable connecting it to the main board, you can just move the CD deck off to the left back side without disconnecting the ribbon cable if you want. The CD deck is held in by 4 screws, one in each corner of the CD deck at the bottom of the deck. They screw into some brass stand-offs from the bottomo of the radio casing. The surface mounted resistors all have "2R7" on them, and all of them need the solder to be reflowed. Just a small touch of the soldering iron and a very small amount of solder on each side of each resistor. This will get the display working again 99% of the time with this problem for your model number. It is always possible that there is a different reason for the display going out, but for your model number, this is a very common problem.

A "FixYa!" rating would be appropriate and very much appreciated for this free information. After all, it is the only reward that the "Experts" here at FixYa! receive for helping people like yourself. I hope you have a good day, and if you need any further help with your radio, feel free to just reply to the post with any further questions.

Dave

Sep 07, 2008 | Kenwood KDC-X590 CD Player

2 Answers

Display on Kenwood Out


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

Jun 30, 2008 | Kenwood KDC-X590 CD Player

10 Answers

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!!

Apr 29, 2008 | Kenwood DPX-4030 CD / Cassette Player

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