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  • pioneer aux in help

    I am about to do the aux in hack for my pioneer DEHP4300R. I have found the diagrams from searching but there are 2 different schematics. On one diagram the pin on the middle row is used for the common ground/left channel -. But on the other it is used for left channel +. Which diagram is correct since I read that some people were having problems with distortion and the input being too quiet. [img]null[/img]

  • #2
    The 2nd pic is correct....the ground for Left is on the top not the middle....have tried it on the DEH-P3150....its a little bit softer and the rear speakers seems not to be working...other than that ...it should be fine...

    1st row R+, R-, L-
    2nd row L+

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    • #3
      hey i have used the top pic for my Pioneer 8250 and it works like a gem ... no distortion what soever also no volume drop ..

      So i guess i vote for the top pic..


      Mastero

      matter of fact the both are correct its just the qus of polarity..

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      • #4
        someone posted the circuit diagram of the CD-RB20 before...

        there are some amplification within the CD-RB20 for the AUX in....that should be the reason why the volume is softer

        normally would hook up to the headphone output(instead of lineout) from the source...this way the "pre-amp" circuit is not really required....

        now still trying to find out what is the required p-p voltage before distortion....

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        • #5
          sockman: this might help. from the crutchfield website (goto the pioneer cd-rb 10, then detailed info)

          "The device connected to the RCA ins must either have an output voltage of 1 volt or less OR have a volume control so that its output can be lowered. Without this this unit will distort and/ or be damaged"

          the link might help if it works

          http://www.crutchfield.com/cgi-bin/S...fo&i=130CDRB10

          I suspect they mean 1volt rms, but you never know, it might be peak2peak. Let me know how your tests go, as i also want to get my input levels perfect
          My Setup

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          • #6
            Are there only 3 pictures in this post cause on my screen the one with the male and female jack are at the top and it looks like there is another image but it dont load.
            Also which one should i go by cause some people are picking the top one and other one.
            http://austmp3car.tk

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            • #7
              Can someone tell me which one is the right one. Thanks
              http://austmp3car.tk

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              • #8
                the bottom one is right , but check the polarity on the left channel
                as it could be reversed.......
                Volvo V40 Phase 2 2002. T4 turbo upgrade.... currently no mp3 or carputer..... researching options

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                • #9
                  MikeHunt: the input (to CD-RBx0) should be 1v p-p "standard" RCA line out??...the problem now is the output from CD-RBx0 to the HU...maybe we need someone with the unit to give us the info....

                  tried using the headphone output...doesn't really change the volume level....

                  i'm guessing 4v p-p for the output from (CDRBx0)....

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                  • #10
                    Thanks a lot spud42. Hey have you sent that cable yet man.
                    Thanks
                    http://austmp3car.tk

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                    • #11
                      Cable?? what cable? I'd like a pioneer IP Cable if any one has one spare
                      http://www.mp3vl.tk Plans and progress on my install - (Updated 28 June 02)
                      Australian mp3car Portal
                      mp3car related links Check them out / Add some
                      mp3car FAQ - RTFF

                      [########==]80% Assembling
                      -=Current Progress: Working Sproggy supply, building box.=-

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                      • #12
                        Originally posted by sockman
                        MikeHunt: the input (to CD-RBx0) should be 1v p-p "standard" RCA line out??...the problem now is the output from CD-RBx0 to the HU...maybe we need someone with the unit to give us the info....

                        tried using the headphone output...doesn't really change the volume level....

                        i'm guessing 4v p-p for the output from (CDRBx0)....
                        That`s a good idea... even anyone with a cd changer and an oscilliscope could also give us this line level info.....

                        I want to get a cd changer anyway, so i can revese the protocol, and use the headunit to select songs, and display song names on the headunit. Anyway, i need a cd changer first

                        Also, if you are unsure of the line level, try just using a sine wave on the input, and increase the volume `till you hear distortion. (Distortion is easy to hear with a sine wave).
                        My Setup

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                        • #13
                          Ok guys i dont know if this will help you all but this is wat i did ...

                          I have a pioneer 8250 headunit and when i connected the audion to this unit first i took the volume of the carputer to 0% and the volue of the 8250 to 50% then slowy increased the volume of the carputer till the output sound was clear and loud then took the headunit to 100% and the sound result was Awesome !!!!

                          Blast ,,,,

                          Mastero

                          PS. .... if anyone needs a IP-Bus input (P-series CD changer input). i can arrange for that mail me ..

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                          • #14
                            Originally posted by MikeHunt79


                            That`s a good idea... even anyone with a cd changer and an oscilliscope could also give us this line level info.....

                            I want to get a cd changer anyway, so i can revese the protocol, and use the headunit to select songs, and display song names on the headunit. Anyway, i need a cd changer first

                            ...

                            Mate if you could get this working, there would be a lot of happy people around
                            http://www.mp3vl.tk Plans and progress on my install - (Updated 28 June 02)
                            Australian mp3car Portal
                            mp3car related links Check them out / Add some
                            mp3car FAQ - RTFF

                            [########==]80% Assembling
                            -=Current Progress: Working Sproggy supply, building box.=-

                            Comment


                            • #15
                              Originally posted by hornet


                              Mate if you could get this working, there would be a lot of happy people around
                              As i said, i`ve got to get/borrow a cd changer first... It`s on "to do" list, which is way to long already

                              Anyway, i`ll post when i start reverse engineering... (good job i`m doing digital electronics this semester).
                              My Setup

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