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Posted on Aug 21, 2007

Kenwood DP-J2070 100 CD Changer Diagram / Repair Help

Dear Sirs! Kenwood DP-J2070 100 CD changer contains a small board named B/3. It is sized 1cm*2,5 cm and it contains a fork light barrier which is used to position the drive correctly in front of the CD's. As this board is broken into parts I gotta repair it. The Problem is that the 3 wires connecting the board to the unit have been removed before having marked them. Now I do not know how to solder what wire to which port. The B/3 contains 3 ports printed with -V, C and E. The drive offers 3 wires: 1 blue, 2 black. Please, can anyone help me how to connect the wires to the board? If someone had this player, he could easily find out to what port the blue wire is connected. To find out about the black wires it should be possible to measure voltage of both cables. It might also be very helpfull if someone has got a diagram of the unit. Thank you very much!

  • x-zoom Aug 21, 2007


    The B/3 board is directly visible if you remove the front cover of the player. It is located at the lower left side of the moving player unit. Only a fork light barrier is assembled onto it.

  • x-zoom Aug 23, 2007


    Rohm 574 photointerruptor ist assembled onto the B3 board.
    Connections are:
    V- to pin 1 and 3
    C to pin 4
    E to pin2

    Blue wire measures 4,85V against first black wire. Mark this wire.
    Blue wire measures 0V against second unmarked black wire.
    Marked black wire measures 0V agains unmarked black wire.

    V- to blue
    C to unmarked black
    E to marked black.

    That's ist....


2 Related Answers


  • 1 Answer
  • Posted on Jan 18, 2008

SOURCE: Kenwood CD changer wiring diagram


  • 107 Answers
  • Posted on Jan 30, 2008

SOURCE: Playing CD-RW audio CDs on Kenwood DP-J2070

try to play a song from original cds.
maybe you brunt it in mp3 file, or its a different format. try to burn your song to cd-r.
if still, try to use nero to burner..
if it wont play your original cds and burnt cds,then the optical lens or the board is broken.
hope I helped you.

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I have a kenwood head unit with 12 pin for a cd changer, I have connected a kenwood cd changer when I press the cd changer source on my head unit it's coming up aux ext but no changer options

It sounds like you're having trouble connecting your Kenwood CD changer to your head unit. Here are a few troubleshooting steps you can try to resolve the issue:
  1. Check the connections: Ensure that all the wiring connections are secure and properly connected to the head unit and CD changer.
  2. Reset the head unit: Disconnect the power to the head unit, wait a few minutes, and then reconnect it to see if the issue is resolved.
  3. Check the compatibility: Make sure that the CD changer you have connected is compatible with your head unit and the 12 pin interface.
  4. Update software: If your head unit has firmware or software updates available, it may be worth updating to see if the issue is resolved.
  5. Contact the manufacturer: If the above steps do not resolve the issue, it may be best to contact Kenwood's technical support for further assistance.
It's important to handle the head unit and CD changer carefully to avoid causing further damage or issues. If you are not familiar with the installation and connectivity of a CD changer, it may be best to seek help from a professional for a repair.

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I have been experiencing the same problem all of a sudden. Almost like it doesn't recognize that there is any information on the disc(s), regardless of whether it is a CD-R or Original disc. As I looked closer, I saw there is also a small spring connected at the top on the swing arm that pulls the CD in (behind disc indicator light) but it is not connected to anything at the other end of the spring. Just hanging there...I've never noticed it before.

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Hi the kenwood changers suffer from jamming up, and dry joints on the socket. try wiggleing the large socket/cable on the cd changer. otherwise you will need to take it for repair. if you would like to have it repaired, please see
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