Question to DIYers!!!! - Page 2

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

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.

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)

Quote:

Originally Posted by johnman1116 

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.

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. :)

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.

Your are most welcome it was my pleasure!

Enjoy your new Keyboard!