Question about Kenwood DPX-501 CD Player
I just solved the problem with my kenwood dpx mp 2090U - (looks similar with 501). FL Display with single CD, USB, 2 Din.
I should share this......... as I received the clue from someone that share the same case to me . Thanks to Mr,Nasirbaek from Indonesia,
The problem is at the main board . Dry (bad) soldering occurred. There are more then 5 resistors in series configuration. The resistor is quiet big (1.5mm x 3.5 mm, surface mount type R) about 2,7Ohms.The position is start from near usb port cable and ended to near big transistor (1 x 1.5 cm power transistor). After resoldering check with multitester to make sure that all R are connected in series configuration.
Just open 3 screws to access the main board. 1 at the top case. 2 at cd assembly, then Carefully take out the CD and the CD ribbon cable.
Posted on Feb 21, 2010
Not knowing how to solder onto a tiny circuit board, I used an X-acto knife to scrape thru the solder on each side of the aforementioned circuits and alas...my display works for the first time in 2+ years. I simply pushed the sharp point of the blade into all the solder points hoping to restore any failed connections and it worked!!
Posted on Sep 16, 2011
Your solution was spot on. It was the fifth chip resistor from the USB location and the further connection in line from the USB.
Posted on May 15, 2012
When I suffered the same problem, I brought it to a repair technician. He generally complained about the quality of the solder. Therefore, if you have access to an old (banned) lead based solder, I would recommend repairing it with that. I have already have had it fixed once and the problem has re-reared itself about a year later.
If lead-based solder is unavailable, then, I imagine, silver solder is better than the Tin/Antimony base.
Generally, I have adjusted to using the setting that turns off the display after 5 seconds so less heat is generated at the contact points. Don't know if it helps but the tech recommended it.
Posted on Dec 20, 2011
Many thanks, solution repaired my radio.
Posted on May 15, 2011
I just did the #1 fix described by pempek40...it worked!! I was indeed skeptical but I just re-soldered those little rectangle resistors. Heat up the ends with a pencil tip solder iron, reassemble, plug it in and there's the display. I was very happy to get this working again and not have to spend $300+ on another head unit. Give it a shot, it takes about 10 min for the actual fix (not including head unit removal/reinstall time) and it's very easy. Just be careful removing the ribbon for the CD player, but otherwise it's straight forward.
Posted on Mar 27, 2011
I tried solution # 1 (with a little 'skepticism) and ... now the display works perfectly!
Posted on Jul 27, 2010
Solution #1 works like a champ!! pempek40 thank you so much for posting!!!
Posted on Mar 29, 2010
The LCD is NOT the problem. Don't bother ordering it. I did, replaced it and the LCD is still out.
Posted on Oct 26, 2008
Where can I buy this replacement part?
Posted on Apr 10, 2008
Probably the LCD problem that everyone is having. The replacement front panel part # is A64-3814-02.
Posted on Apr 08, 2008
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