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Old 01-09-2006, 11:05 AM
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AUX Input Installation & DVD in Stereo

Contributed by: jmh















AUX Input Installation & DVD in Stereo














Early last year I decided to install the TV tuner
from NAV-TV and also install an Alpine DVD
player at the same time. Well as it turned out the sound portion of the TV Tuner
is only mono which also include the audio input for an external source such as a
DVD changer. For the past 12 months I have researched many websites and as it
turned out the ones who claimed to have a working solution never really came up
with a functional and working product (after all one has to tap into the BMW
iBUS which requires some understanding and thought). After spending countless
hours in selecting a functional and working module I ended up buying the module
available from TVonNAV , as I already had
the TV tuner installed I opted for the
module on its own which
TVonNAV is reselling for 200USD. The module will allow you to select an
alternate audio source while watching TV (or using the AV input of your TV
tuner), it will also add the capability to switch TV tuner stations using the
steering wheel controls and if you don't have the TV tuner from NAV-TV it will
also add TV in motion.



For most other folks the AUX Input is useful to
connect an external audio device such as an iPOD or XM/Sirius tuner to the BMW
factory head unit. As I don't have an iPOD or XM/Sirius radio tuner my main
motivation for this modification was to finally have DVD in stereo by selecting
the AUX Input whiles watching DVD on the TV monitor.



The part number required for my 03 X5 4.6is with
NAV is 82 11 0 149 391 (appr 30USD). There's also an AUX Input for non-NAV
cars. Your best option is to buy the AUX Input from Crevier who offers an online
parts counter at http://bimmer.roadfly.org/bmw/forums/partscounter/ , Chris is of great help
and very responsive and will make sure you buy the correct part(s).



I also added a little relay in order to be able to
switch from the DVD stereo input to the AUX Input jack (to avoid having multiple
sources active at the same time). I installed the switch and AUX Input jack into
the ashtray.



So prior to installing the AUX Input kit the sound
of DVDs was more like 'broken' THX
J


Before the AUX Input was used for DVD Audio






In order to install the AUX Input cable one has to
remove the NAV headunit, note the four red circles, these are the torx screws
you need to remove after removing the plastic trim piece around the headunit.
The plastic trim piece can easily be pulled off, however you may have to open
the cassette deck door at times in order to bypass the automatic closure
interval of the display (appr 30 seconds), another option is to just stick an
old cassette half way into the cassette deck.






Below you can see the TVonNAV module which I
installed into the spare slot next to the factory TV tuner location in the
battery compartment underneath the spare tire. The module itself will plug into
the factory/standard wiring harness and no additional work is required.







As I have a
fairly extensive audio
installation
in my car I had to remove the DVD player from the mounting
brackets which is not really something I want to do every day






After installing the cover for the CD changer, NAV
player and DVD changer I was able to disconnect the original wires connecting
the DVD changer audio to the NAV-TV audio input (mono). I connected the new
cable to the DVD changer and routed it to the front where it will be connected
to the AUX Input adapter.






In the front the AUX Input adapter needs to be
connected to the spare wire behind the headunit






Below you can see the AUX Input adapter cable
connected to the wiring harness. At this point the DVD audio input was spliced
into the AUX Input adapter harness (not there's a capacitor board and resistor
build into the AUX Input cable (next to the white label in the picture) you want
to make sure you splice the input into the cable before the capacitor board (it
eliminates "pops" from the audio input source)).






Once the AUX Input harness is connected you will
be able to select 'AUX' as a new choice via the 'Mode' button on your headunit.
You can use the preset buttons (radio station buttons) to adjust the input
volume of the AUX Input (note the P4 in the display which means preset button
'4' was selected for the input volume). The AUX Input will also allow you to
control Treble and Bass as you can do already for Radio and CD, also DSP will be
available for the AUX Input.






Here is the location where I mounted the AUX Input
jack and button to switch between DVD and AUX Input Jack. If it is switched to
the AUX Input the red light will be illuminated. For those of you planning to
connect an iPOD or other external audio device it might be better to install the
AUX Input jack into the storage bin underneath the armrest. I was thinking about
mounting it into the cup holder area but this would have required to remove the
whole middle console and I couldn't justify the work required for this (yet).






Well once finished with the AUX Input and wiring I
now finally have true DVD in stereo and the DVD sound much better (especially as
the sound effects are much more impressive and the stereo system can play to its
full potential).



One minor issue with the TVonNAV module was that I
never received a 'user guide' and had to figure out on my own how to select an
alternate audio source etc. In the end it's very easy and all you to do is to
select the audio source before switching to 'Television' and once you are in
Television mode you use the '<>' button to activate the alternate audio source
(which by the way could also be the CD Changer, tape or Radio). You can also use
the clock sign to display the time on your TV screen.






Overall I am very happy and the installation of
just the AUX Input should not take longer than half an hour or maybe an hour if
you install the input jack into the storage bin. For the DVD in stereo part the
most time consuming part is to route the cable to the front which adds appr.
another hour to the project.



As always if you are in the Boston area and would
like to have the work done by a professional installer I'd recommend to consider
visiting the folks at Sound in Motion
who will be happy to help (and have lots of experience with BMWs and high-end
car stereo)


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