Pioneer IP bus hack confusion

cheesyhoward · 11-05-2001, 06:09 AM

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.
Diagram 1

Diagram 2

Cheers

Mastero · 11-05-2001, 08:55 AM

hey buddy i dont about your second diagram but surely i have used the first one in my car 8650 pioneer and it works great ,,,

mastero

cheesyhoward · 11-05-2001, 09:19 AM

cheers

moahdib · 11-05-2001, 04:11 PM

First diagram is an error...go with the second one bc it's straight out of a pioneer cd-rb20 schematic. I have used it myself and it works too.

gerard · 11-05-2001, 05:40 PM

dont know about the first (havent tried it) but the second worked for me

mp3pc · 11-05-2001, 08:31 PM

I posted the 2nd one way back it works well. I also have a picture that can clear it up a bid that I created looking at the real deal.... I am having problems getting into my mp3car site so I cant post the picture right now but if someone else wants to host it I can email it to you. mrhic@home.com

magnetik · 11-25-2002, 02:55 AM

To help clear this up (and since I couldnt find a definate answer anywhere on this forum).....

I installed a Pioneer Head Unit with my old JL-Audio speakers into a mates car on the weekend ready for a mp3car system too and was looking around for all info here.... this was my result -

Both diagrams listed above work. BUT (and a big but) the SECOND diagram results in a much quiter output sound, so I used the FIRST diagram (Arby's one). Im guessing that this is deliberate for different versions of Pioneer CD-changers?
The AUX mode does not enable automatically, which cause me alot of trouble. I assumed that with the headunit detecting a ground on the two return audio pins that a new option would appear. After alot of scratching heads and another search I found a post from Maestro saying that you need to hold the FUNCTION key for 4-seconds with the power off to bring up a hidden menu and enable AUX mode. We didnt have a FUNCTION key on our headunit but played around with the main keys and found that the button that changes the FADER/EQ/BASS/TREBLE/ETC was the equilivent of the function key - and worked a treat....
Ensure you ground the ground wires back to the chassis of the head unit to get a good quality signal. I soldered directly to the IP-BUS pins on the back (I have a thin soldering tip, steady hand and a few hundred hours PSX MOD chip experence - so I am used to fiddly soldering work!) and used heatskrink tubing over each wire once soldered to avoid the chance of shorting - due to close distances between the IP-BUS pins...

hope that helps clear things up once and for all...

jol · 11-25-2002, 06:13 AM

Aux-mode enabling is in the manual.

A guy in sweden sells theese, they're $37.5 each...

I coulnd't find any reseller of the original one, so i got one.
they were 3 internal cdrom audio connectors on top of each other glued together, with the center hole drilled up to fit, and shrinktubing around it. When I got it, I couldn't believe it was so easy/cheap made, but it works, and thats enuff for me

thenominous · 11-25-2002, 05:50 PM

Quote:

Originally posted by jol
Aux-mode enabling is in the manual.

A guy in sweden sells theese, they're $37.5 each...

<sigh>

The things I wish I'd thought of....

When I first tried it out, I found it was very quiet, but that's partly what the rest of the crap in the CD-RB20 circuit is for.

Dave

CrazyLittle · 11-25-2002, 06:58 PM

Crutchfield has one for $29 that's a 3rd party IP-Bus cable, professionally made. Works great, less filling. Also less likely to come loose or screw anything up because they use a REAL IP-bus plug. search for Cruthfield number: 469PiOPRCA

Holden__V8 · 11-26-2002, 01:43 AM

Hey a while back i used the 2nd diagram for my pioneer deh4150 head unit and i found it very quiet too. How can i make it so it isnt as quiet.
Thanks

magnetik · 11-26-2002, 03:57 AM

Quote:

Originally posted by Holden__V8
Hey a while back i used the 2nd diagram for my pioneer deh4150 head unit and i found it very quiet too. How can i make it so it isnt as quiet.
Thanks

use the first one!!!