Solved: Front USB wiring on Shuttle AN35N-U

[BlackMountainCow]

Hi, I hope some of u can help me!


Situation:


On my Shuttle AN35N-U I got 2 connectors for front USB, each one providing 2 USB ports.
There is a slot USB adaptor that came with the board occupying one of these connectors, giving me 2 USB ports on the backside of my board. (Additional to those 2 one always has on the mobo ports)


Problem:

I want to use the second connector wired to my front USB panel. BUT. On the Shuttle AN35N-U there's only one shield pin for my two front USB ports ground wires. For the slot adaptor that came with the board as far as I can see they simply put both shield wires together on this one pin.


Question:

Is it safe to just connect the two shield wires of my front panel and put them together on the one shield pin of my mobo??

I just have never done a "hardware mod" on a mobo nor am I good at electrical stuff. And don't wanna fry my new mobo because I connected two seperated shield wires on that one mobo shield pin or fry my MP3 Jukebox when I connect it to my PC via one of those front USB ports.



Any help is very much appreciated and I hope this explanation wasn't too confuse. (English is not my mother tongue)


Thx in advance!

 

[Buz2b]

On page 34 of your manual (English Version), you will see the connection diagram, also known as pinouts. There are in fact two grounds; one on each set of pins. Do you have two single cables like this, or do you have one single connector that covers both sets of pins?
If you go to this site/page and scroll down the page, you should find the info on connections that you need. Just match up the wire colors to the connection diagram from your manual that I mentioned.

 

[BlackMountainCow]

Thx Buz2b!

BIG BIG SORRY: I meant "SHIELD" and not "GROUND" .. :Q .. my bad!!!! Of course I have two ground pinouts, but only one shield pinout pin!!! My bad, sorry! I also edited the above post to change that mistake.

It's right, I've got two pinouts on my board. JP3 and JP2. JP3 is occupied by a slot USB thing that gives me two USB connectors on the back of my PC. It's one single connector covering both sets of pins. The two shield wires are joined together on the one shield pin.


But for JP2 I've got no connector but just all the different wires separated coming from my front USB ports. They're all marked fine, so identification is not the problem. It's just that for my two front panel USBs I got two wires each saying "shield" but I only got one pinout for shield, as pin number 9 is just not there. It's an empty pin as u can also see on page number 34 in the manual. (they call it "key"). So the whole thing is al about Pin 10.


That's why I ask if it is safe to combine my two "shield" wires on just that one shield pin as I just don't have a second one. The slot USB thing came with the mobo, so of course the producers knows that there is no second shield pin so they make that cable to fit. But the front USB is from my case producer and how could he have know what mobo I got. So I guess they just provided 2 shield wires.


Thank u again!

 

[BlackMountainCow]

Btw, on the link u posted (link) Example C is what i got. Only one shield pin fo two USB pinouts ...

 

[Buz2b]

Originally posted by: BlackMountainCow
Btw, on the link u posted (link) Example C is what i got. Only one shield pin fo two USB pinouts ...

Let me see if I have this correct now. What you are worried about is the 5th wire, referred to "S-GD" on the one set of pins but not on the other. Correct?
In this case, simply match up the wire colors/designations. Yes, on one connector you will be left with a fifth wire that does not connect to a pin (Key?). As long as the others are matched up (the main four), you will be fine. You should not "combine" the wires on the plug.
I assume from your earlier post that the front panel connectors are individual "plugs". Take a close look at the labels on the plugs themselves. You need to separate and organize them to match up with the pins as listed in the manual (page 34). You should see some designation that organizes/separates them into two groups. It will be something like "+5v-1" & "+5v-2" and "GND-1 & GND-2", etc. Using the diagram from your MB manual, install those plugs on the appropriate pins. The first four are the most important.
Actually before you do this, can you tell me, what are the labels on the plugs that are left AFTER you match the first four? I can probably tell you more if you list those.

 

[BlackMountainCow]

Thank u very much Buz2b

Let me see if I have this correct now. What you are worried about is the 5th wire, referred to "S-GD" on the one set of pins but not on the other. Correct? In this case, simply match up the wire colors/designations. Yes, on one connector you will be left with a fifth wire that does not connect to a pin.

That's exactly it!! *cheer*


I matched the 8 main USB wires (Volt1, GND1, Data+1, Data-1 .... and .... Volt2, GND2, Data+2, Data-2) to the pinout according to my manual. All colors match, and the wires have their function printed on them, so that was the easy part. That mobo btw is not yet connected to my PSU so I guess no harm has been done by now

So now I've got two wires left, Shield1 and Shield2. But there's only one more pin left, (Pin Number 10), as Pin Number 9 is just not there. It' empty.

Why do u think it's not a good idea to combine these 2 wires (one for each of the two front USB plugs I guess) on this one pin?

The PCI slot shield that came with the mobo actually does that as far as I can see ... The wires are all wrapped in a plastic cable shield, so it's hard to determine, but there's definitly only one wire for the two back USB plugs going on Pin 10 of the other pinout, which is the Shield Pin.


Hope this helps u to understand my prob a bit more


Thx

Christian

 

[Buz2b]

Why do u think it's not a good idea to combine these 2 wires (one for each of the two front USB plugs I guess) on this one pin?

In a nutshell, because it isn't necessary and in trying to do so you could compromise the connection needed. You would have a difficult time combining those wires on a plug that would get a solid connection. The "extra" wire you have is because of the multitude of plugs that are out there. You saw some of the different plug combinations on that page I linked to earlier. Your case manufacturer has to allow for the most possibilities. The extra "GND-S" pin is redundant. Just fold it back and secure it to the main wire.

In case you need further convincing, take a look at the "Standard USB Cable Layout" (just above the section where your plug is shown) on that linked page, you will notice that the USB plug itself only uses the first four wires: Voltage, Data, Data and Ground. I'm not sure exactly what the Ground Shield does other than grounding the plug itself (not to confused with the Gnd part of the USB connection)

 

[BlackMountainCow]

As soon as my memory ships I gonna power up that mobo and test my USB front panel.

Thank u very much Buz2b!!

I really appreciated your help!

 

[Buz2b]

Great! Enjoy! LMK if there is anything else needed.