[raamaudio]

2014 Fiesta ST, probably same schematics or very close for other models.

I want to see if I can bypass at least the speaker level outputs which I can probably do without the schematics but would be a nice help to have them.

Also looking to go deeper into it but not likely to work out as most use a DSP/DAC in later vehicles I have worked on. If I got lucky, DSP after the DAC.....then get a cleaner signal to work with.....at least no factory goofy EQing.....for the lousy speaker placements, etc.......

I wish more would hire audio engineers and let them actually do their job or at least like the 07 Tundra LTD I had, I spoke with the head engineer at the company that did audio system, they only had so much budget but the speakers were pretty decent and there was a pretty darn good sound stage and tuning. Just adding in an amp made for a very good system but of course it could be better yet but it was a great starting point.

The MyFord system is pretty poor but if I can bypass some of it to make for less processing, reprocessing, etc....as I need to keep the stock HU and do not want a bunch of other stuff in the car, just some EQing, I have an amp with the crossovers, I can dial in the sound stage without TA, at least have in the other cars and trucks I have done over the years, only used a tiny bit of TA once. (stock tweeter locations will not work for sure, stupid placement to say the least)

Thanks

 

[D1JL]

Ford does not publish the info you are looking for as they do not repair but just replace these units.
You may need to contact Sony.


Dave

 

[raamaudio]

I know, I have been modding "factory" HU's for quite some time now, it used to be easy on most to tap an SPDIF out of the read head and use it to feed an outboard processor. Now we have many other sources besides CD players but some of those can be in digital as well. Now I just want to get the least modified signal out of the DAC if possible but if not at least hopefully before through their EQ, not to likely, if not then before their amp stage, anything I can do to have the least processed signal the better, they do not use great gain stages normally so best to skip them.

Sony will not give such info out but I might be able to find the schematics via a repair facility if they farm it out which most do here in the US at least.

Thanks

 

[raamaudio]

Anybody found these yet?

I really want to find a way to bypass the factory tuning if possible and have a line level out to a real processor, it would be the absolute best way to make the stock based HU sound very very good. There are some reasonably priced processors out now and I have a couple here to test once I figure this out. I can just use speaker level outs from the stock HU but that is far from optimal for many reasons.

Of course anything I learn will be passed on unless it comes from a pro that asks me not to if they are developing a solution for us.

Thanks
Rick

 

[eRic]

www.helminc.com has the 2014 Fiesta Wiring Diagram in stock.

 

[raamaudio]

The wiring diagram can help but usually I find I have to have the schematics to find where to tap into the board to get what I need, thanks though, I will take a look)

 

[davidp]

let me know if you get more info on this!

 

[raamaudio]

I have seen inside one of these units, multilayer board not expected but flat packs and SMD was, it would be very difficult to tap into a circuit there and most likely not able to pull out a signal usable as all the processing is probably on the same chip. There is probably an I/O chip to integrate different inputs but still that would not really help.

The best that can probably be done and not with to much effort is ID and tap into the audio before it goes to the little on board chip amp which may help make for a better quality signal but it might also not be that much better..

I was hoping to go around any on board processing for the cleanest signal possible, I cannot even start to work on that until I have the schematics or the data on the pin outs of the flat packs which I already looked at the manf site for which are not listed, the chips are proprietory to Sony it seems.

I will do what I can.