On Mon, 20 Mar 2017 23:40:15 -0700 (PDT), wrote:

https://goo.gl/kDK0d3
There's a group of 'schematics'

Try one of these pin diagrams instead:
https://www.google.com/search?q=samsung+headset+connector+wiring&tbm=isch
This looks right:
http://i4.photobucket.com/albums/y136/invinciblegod/TRRSConnector3-1.png
It's a TRRS (Tip-Ring1-Ring2-Sleeve) connector.

Serious work fir 2 channels but mono's OK ...not sure if S5 delivers mono.

Nope. It's stereo on the Tip (right channel) and Ring1 (left
channel).

There is the problem of a silicone sheath ground 'wire' in there ?
If so heating the tip burns off the Si prob crimped in...is this correct ?

That would destroy the connector. Soldering to the contacts works
better than burning up the insulators with the soldering iron.

How about an AL or copper rectangle placed into the female n
secured via a bend n run on the case ?

You'll never get it into the hole in the jack unless you have a
microscope and are very good with a micro-manipulator. It also won't
stay in place as any glue used to hold the copper in place will get
hot, melt the glue, and cause the copper to fall off. You could
take apart the S5 and fix the jack, but that's difficult because it's
too well sealed.

You can buy a replacement headset connector for about $10.
http://www.ebay.com/itm/OEM-Samsung-Galaxy-S5-Headset-Jack-Audio-Port-Connector-Verizon-G900V-AT-T-G900A-/301713329596
https://www.ifixit.com/Store/Parts/Galaxy-S5-Headphone-Jack/IF236-012-1
I think this would be your best option. Disassembly instructions:
https://www.ifixit.com/Device/Samsung_Galaxy_S5
Try really hard not to screw up the phone.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558