Re: Installing front USB cables? Help please - don't know which cables!!!

David D wrote:
I dont; really care about the audio so much, if I can do something
after the USB I will, but for now it is fine to leave it.

The first set, do have something to do with front audio. But perhaps you
have a typo here ? I would have expected to see a microphone input
instead of two "MIC BIAS" pins. L-IN/L-OUT is suitable for
traditional AC_97, and because your HDaudio CODEC has plenty of
channels on it, it no longer needs the L-OUT (or R-out) signals.

Nope, that is as is listed.

OK, you have three options for the audio:

1) Forget about connecting it up.
2) Buy and install a 5 1/4" drive bay set of audio jacks. Even if
you do this, you'd still have to pull the return wires from the
2x5 plastic shell on the end of the wires coming from the drive
bay. Because with an HDaudio header, there is no place for return
wires.
3) Get a multimeter. Set if on the ohms scale. Plug a male to male
1/8" stereo extender cable, into the front of your computer case.
Use the multimeter to buzz from a labeled wire, to a contact on
the 1/8" plug. By doing that, you can identify which wire is
which, and tell the difference between MIC-IN and MIC-BIAS.
You can actually safely swap MIC-IN and MIC-BIAS, so you could
experiment with your two MIC-BIAS wires, and try them both
ways. One way is going to give you more microphone channels
than the other way. But seeing how screwy your audio wiring
cable assembly is, I'd really want to verify the whole
thing.


The 1x4 for USB, would go on one side of an Asus USB header.

> DATA+1
> DATA-1
> GND1
> VCC1

my mistake, it does go - VCC1, DATA-, DATA+1 GND1


Note that the order you list them, is not suitable for
direct connection to the Asus header. You can see a
typical dual USB header here. A 1x4 connector fits to
either side of the header. And the order of the pins
is usually VCC, D-, D+, GND as far as pin order goes.

/ vcc X X vcc \
USB _/ data- X X data- \_ USB
#1 \ data+ X X data+ / #2
\ gnd X X gnd /
X NC

Is your USB cable, a cable with four individual wires
and plastic squares on the ends ?

4 individuals.


Or is it a 1x4, where
the pin order is as you list them ? Whatever it happens
to be, the pins should line up as shown with the Asus manual,

Problem is the manual does not show any closeups of the USB hub in the
motherboard.

and my drawing above is just another way to show the same
info. If the signal order really is wrong, you'll have
to fix it.

Now, the male ends on the motherboard are 2 banks X4 of male
connectors. Does it matter if I pick the upper or lower bank? Will
my motherboard die if I put the pins in the wrong tip?


You can select either side of the 2x5 header, to make connections
with your 1x4 shell. Just make sure the VCC end is connected to
the VCC pin. If you accidentally flipped the 1x4 by 180 degrees,
you would fry whatever USB device is plugged into the port (and
maybe even the motherboard's USB interface). So take a few moments
to verify you have it the right way round. The "odd pin" should
help you identify which way round it goes.

The most safe way to deal with front panel wiring, is to not use
it at all. I actually ripped the front cable harness out of my
last build - I've taken the time to buzz and verify the wiring
on several Antec cases, and found wiring errors, so it is just
faster for me to tear it out and not be reminded by a clump of
unused cables hanging down :-) The connectors on the back of the
computer, are safer in that respect, in that they are permanently
wired by the motherboard designer. Chances are, someone checked
them for correctness, before the board shipped.

Paul
.

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