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Newbie
Posts: 3
Registered: ‎06-24-2009

Re: DIY Line Out Cable - Works!


14124all wrote:
WhiiteRaven, the AMS chip does have 2 dedicated line inputs. There most likely is no hardware connection on the Fuze board to the chip pins and no enable in the firmware. Maybe the next generation Fuze or another model will enable it. This chip is loaded with features that are not used in the Fuze.

Yeah, the AMS 3525 datasheet shows that it has a lot of capabilities.  2 line-ins, 2 mic-ins, 1 line-out, 1 headphone-out, 1 speaker-out.

 

Presumably one of the line-ins is used by the FM radio chip (Si4702 according to Rockbox folks), and one of the mic-ins is used by the internal microphone.

 

It seems really surprising that Sansa would leave the spare line-in totally disconnected, even if none of their current accessories or firmware can use it.  Apparently 18 out of 30 pins on the Sansa dock connector are currently unaccounted for ... seems surprising if none of them is a line-in.  Any thoughts on how to figure out which pins those could be?

SanDisk Fanatic
Posts: 363
Registered: ‎08-02-2008

Re: DIY Line Out Cable - Works!

Finding the line-in connections (if attached to traces) won't be easy. The SOC needs to be removed due to it having no exposed edge pins. It is pad mounted with all connections under the case. Even if it is there, you need firmware that enables it. I have no need for line-in, so I have better things to do with the Fuze:

Recently picked up a defective Klipsch iGroove SXT with volume problems. Got that worked out tonight, and now I'm working on modding the dock connector from iPod to Fuze. Initial checking looks to be a easy mod for charging and line-out feed to the SXT. Don't think it will be possible to do function control and I probably won't waste time trying. Functions will have to be done on the Fuze, SXT will just have volume control for it's amp. Hope my iPod pinout is correct, or I might blow a Fuze!!!

8GB Blue FUZE w/The Original DIY Lineout Cable and AT Button H-Phones Fitted To AT WM5 Headband:All Custom Built
SanDisk User
Posts: 59
Registered: ‎04-09-2009

Re: DIY Line Out Cable - Works!

Wow, I've been browsing these forums for how long now and I haven't come across this post?!

 

This is exactly what I've been wanting, assuming the player will charge while plugged in, of course...

 

So where does one get a sacraficial cable at? Smiley Very Happy

SanDisk User
Posts: 24
Registered: ‎01-14-2009

Re: DIY Line Out Cable - Works!

No sure if anyone is still interested in DIY'ing your own Line-Out Dock for Fuze, but here is an updated version I just finished that is based on FiiO L6 LOD. Basically I have taken the L6 apart and upgrade the caps inside for better sound quality.

 

Check it out here:

http://www.inearmatters.net/2010/09/review-mod-fiio-l6-lod-for-sansa-fuze.html

http://www.head-fi.org/forum/thread/514061/review-mod-fiio-l6-lod-for-sansa-fuze

 

Cheer.

SanDisk User
Posts: 23
Registered: ‎01-16-2013

Re: DIY Line Out Cable - Works!

Hi;  This might be a little off topic, but this tread was the closest on I could find for my question.  It does have something to do with line out. 

will Line Out Dock LOD Adapter For Sansa Fuze bypass headphone jack?

On my oldest Fuze the sound cuts out some if you bump the headphone jack, then goes back to normal when not bumped.  I know the headphone jack can have issues.  Everything else works just fine.  I found a

New Line Out Dock LOD Adapter For Sansa Fuze MP3 Player To Headphone Amplifier

http://www.ebay.com/itm/271202448081?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT 

on ebay.    What I want to know if I plug this into the Fuze and plug the head phones or speaker into the adaptor will it work like you are just plugged into the headphone jack?  Can you adjust the volume from the Fuze like normal?  I just though that if I could bypass the headphone jack I could get a few more years out of my beloved Fuze.  Thanks 

SanDisk Guru
Posts: 1,265
Registered: ‎04-24-2009

Re: DIY Line Out Cable - Works!

You could plug a headphone amplifier or stereo into the line out dock, but not headphones. IIRC volume control will not work, you use the volume control on the amplifier instead.

 

If you want to use headphones, you could open up the player and resolder the headphone jack.  Be very careful if you do this though, its quite easy to break off the cable that connects the Fuze wheel to the mainboard.  

SanDisk User
Posts: 23
Registered: ‎01-16-2013

Re: DIY Line Out Cable - Works!

Thanks.  I was hoping it would work Smiley Sad  What if I had a pair of headphone with built in volume control?

      I could try soldering, but I haven't done it with little things.  I am not sure my 30 year old soldering gun is up to pin point size drops. 

    I was hoping for a work around so I wouldn't have to crack open my Fuze.  Can you plug headphones into a cheap portable mini amp?  Thanks again.

SanDisk Guru
Posts: 1,265
Registered: ‎04-24-2009

Re: DIY Line Out Cable - Works!

The line out amplifier has very low maximum power, so while you can try to plug headphones in, it may not sound good and will probably very quiet. Worth a shot I guess. Usually though you plug in an amp which then boosts the signal up to a reasonable power.

 

The other option is to press the headphone connector down onto the board and then epoxy it.  Usually this works as well as soldering.  

SanDisk User
Posts: 23
Registered: ‎01-16-2013

Re: DIY Line Out Cable - Works!

Thanks.  I might try the adapter with a portable amplifier                  http://www.amazon.com/dp/B005HJWWW8/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=1JYB1W46DW3TQ&coli... I am worried I might wreak my Fuze trying to open it up.  I have seen people selling some with broken clips from them opening it up.  I'd rather not have to use packing tape <G>.