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Question to DIYers!!!! - Page 2

post #16 of 25

Since they supply a PS/2 to USB adapter the Cypress chip will autodetect PS/2 / USB connection. So in theory all you need to do is hook up a USB end on the cable and connect it all up USB.

 

You'll still have to verify Red / White as +5 and Ground and Pin 1 is D+ Pin 2 is D- you can trace those out to the blues.

 

Much Easier than PS/2

post #17 of 25
Thread Starter 

IMG_20120616_194535.jpgDarkblue - R23, Light Blue - R3, White - R4, Pink - R7

There are 14 wires + the shield. Im not sure which pin number im supposed to use. I see R1-36, C17.


Edited by johnman1116 - 6/16/12 at 8:30pm
post #18 of 25

Ok what we have here is this:

Pin 1 & 2.jpg

 

If Pin #1 on the Cypress Chip connects to the top side (Closest to the Chip) of R3 and Pin #2 connects to the top side of R4

Also If the bottom of R3 connects to the Lt Blue and the bottom of R4 connects to the White.

 

Measure to see if the Blue wire connection is approx 0 ohms between either one of the two orange SMD caps (EC3 & EC1) to the left of the white connector. Measure between the Non Striped end (Side closest to the LED's) of one or both of the Cap's and the blue wire.)

 

Does the Lt Red & Orange wire at the white connector share a bridged connection (0 ohms between them), from the new picture it looks like the Orange, White, Green, Black is the other USB feed wire for the Keyboards HUB. If they are not 0 ohms between them it's ok I was just curious.

 

If the the Blue, Lt Blue, and White connections above are true then I would say that you have your pinout for the chopped off end.

 

Blue = Ground USB & PS/2 Ground

Lt Blue = USB Data+  & P/S 2 Data

White = USB Data-  &PS/2 CLK

Lt Red = +5V USB & PS/2 Power

 

So all you need to do is solder up a USB or PS/2 connector on the end of the keyboard wire with the above connections and you should have a working keyboard. (Providing the only thing wrong was the broken PS/2 Connector)

post #19 of 25
Thread Starter 
Quote:
Originally Posted by TrollDragon View Post

Ok what we have here is this:

 

 

If Pin #1 on the Cypress Chip connects to the top side (Closest to the Chip) of R3 and Pin #2 connects to the top side of R4

Also If the bottom of R3 connects to the Lt Blue and the bottom of R4 connects to the White.

CHECK

 

Measure to see if the Blue wire connection is approx 0 ohms between either one of the two orange SMD caps (EC3 & EC1) to the left of the white connector. Measure between the Non Striped end (Side closest to the LED's) of one or both of the Cap's and the blue wire.)

BOTH .7 AT 200 OHM

 

Does the Lt Red & Orange wire at the white connector share a bridged connection (0 ohms between them), from the new picture it looks like the Orange, White, Green, Black is the other USB feed wire for the Keyboards HUB. If they are not 0 ohms between them it's ok I was just curious.

using a continuity test from the usb ground to connector, usb ground = dark blue  (left) and Black. D+ = Dark GREEN. D-  = WHITE, Vc = RED (LEFT).

No connection between light red(PS/2) and Orange. 

 

MIC TRS = OJ,Pink, Yellow (right to left on white connector). Audio TRS = light green, orange, hot pink (the next 3), The Next four are the USB + dark blue which leaves the last four to the ps/2. I dunno  if that was helpful.

 

===============================

So I soldered the keyboard to the extension and all the readings matched up. Weird though, when I plug in the USB converter, Ground becomes light red and +5V is now Blue. the data/clock dont even read. 

Im sure I did the ps/2 right/.

 

actually more likely that the ps/2 is wrong, right?

PS/2          extension

white          green

light red     red

light blue   brown

blue           orange


Edited by johnman1116 - 6/17/12 at 3:31pm
post #20 of 25
Thread Starter 

By the way, I never thanked you for all the help this far. I appreciate it a great deal and definitely would be so lost with out it.

Thanks,

post #21 of 25
Quote:
Originally Posted by johnman1116 View Post

By the way, I never thanked you for all the help this far. I appreciate it a great deal and definitely would be so lost with out it.

Thanks,


That is not a problem, I like to see people get stuff fixed up.

 

Your wire tracing sounds good to me...

I'd say that you PS/2 connection is wrong.

 

This is the Cable end of your Extension.

You have to find out which wires go to which pins.

 

mini_DIN-6_male.gif

How it should be connected:

1 Data = Lt Blue from your Keyboard cable

3 Ground = Blue from your Keyboard cable

4 +5 = Lt Red from your Keyboard cable

5 CLK = White from your Keyboard cable

 

You will have to find out which colour on your extension cable matches up to the corresponding pin.

 

Also note that PS/2 cannot be plugged in live as it will not reset or be recognized properly.

You have to power off for PS/2 connect / disconnect (A reset will not do it.)

If everything powers up but the keyboard does not function, it is also possible that Pin #1 & Pin #5 on the PS/2 connector are reversed.

(The data sheet does not specifically list which pin is Data or CLK on the Cypress Chip.)

 

Alternative...

If your going to hook a PS/2 connector on the cable and then put the PS/2 to USB adapter on it.

Why not just hook the Keyboard cable up to USB and see what happens.

Dollar store USB cable and hack the end off, if you don't have a spare cable to use. :)

post #22 of 25
Thread Starter 

Keyboard     Extension.

light red        orange

blue               red

white             black

light blue       yellow

=====> allows for keyboard function but the LED function does not work. The num lights work but the the backlight keyboard does not. 

 

Keyboard   Extension

light red      Orange

Blue            Red

light blue    black

white           yellow

=======> the num, scroll, caps lock lights are on but the keyboard backlit is still not working. function does not work as well.

 

       Extension

1     Data black 

2

3     Ground Red

4     Vcc       Orange

5     Clock     Yellow

6

 

I basically have it working with option 1. i hope i didnt burn out the led's or something :(


Edited by johnman1116 - 6/17/12 at 10:22pm
post #23 of 25

You are plugging both the USB & the PS/2 connectors in yes?

I think the backlight function is part of the USB side.

 

 

I think this one is your winner:

Keyboard     Extension.

light red        orange

blue               red

white             black

light blue       yellow

 

 

The backlight on my G15 does not light up until Windows / Linux boots up, could be the same deal.

post #24 of 25
Thread Starter 

IMG_20120618_130946.jpg
T
hank you so much! Youre awesome!

 

Its interesting because the ps/2 only allows the backlit keys to work when the usb is also in.

Thanks again!

 

Thread closed :)

post #25 of 25

Your are most welcome it was my pleasure!

 

Enjoy your new Keyboard!

 

beerchug.gif

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