Thread: Synaptics Touchpad TM41PUK324

Certainly don't go by colors, only stuff that is meant to be user-serviceable tend to follow any sort of standard. Wait until you can pick up a new multi-meter before attempting anything.

yeah, having serviced Compaq PC's for years I know not to trust their colour co-ordination

OK, just picked up a cheapy $6 multimeter while my Fluke goes in for RMA, and I can get a circuit between pins 1 and 4, and between pins 4 and almost anywhere else on the ASIC (X and Y pins etc) which leads me to believe that pin4 (orange) may be +5v - going straight through the PCB to the touchpad where charge differential (caused by a finger) is picked up by the ASIC and translated into X and Y co-ordinates which are then pushed back across DATA and CLK.

No circuit between 1 and 2, 1 and 3, 4 and 2 or 4 and 3. Only 1 and 4.

So my current opinion is:
Orange - +5v
Red/Brown - DATA, CLK (unknown order)
Black - GND

Oh yeah. I just remembered these things are typically very fault tolerant. Most touchpads are figured out by just randomly connecting things and re-trying until they work.

when I picked up the cheapo multimeter I grabbed some stuff to throw together a breakout board, and I dug up a dead laptop mobo from work's recycling bin to donate a PS/2 port, so I'll be soldering that all up and testing it tonight (it's 4.30pm here) I'll let you all know the results. Hopefully it will be just as easy as swapping red and brown to sort out DATA from CLK

Bingo.

It is in this order:

Pin 4/Orange: +5v
Pin 3/Brown: CLK
Pin 2/Red: DATA
Pin 1/Black: GND

Hi

I've also a Synaptics Touchpad TM41PUK324 (compaq e500). From a microsoft ps2 mouse, I've taken the male connector and it's wire .

The microsoft mouse ps2 connector have 5pins


yellow -> pin5
white -> pin4
orange -> pin1
blue -> pin3
black (this big black wire seems to be GND, correspond to the metal part located around the male connector)

ps2 male connector -> Synaptics
yellow -> brown
white -> orange
orange -> red
blue -> black

doesn't work (not detected by winxp)

I also tried
ps2 male connector -> Synaptics
yellow -> brown
white -> orange
orange -> red
big black -> black

doesn't work

Do I need some special drivers ??

What's wrong?

Thanks

Judging by the information you've given, the first guess was right.

1 data Orange - Red
2 (reserved)
3 gnd Blue - Black
4 +5v White - Orange
5 clock Brown - Yellow
6 (reserved)

ps2 male connector -> Synaptics
yellow -> brown
white -> orange
orange -> red
blue -> black

RE: The big black one - this is shielding, the touchpad should work without it, but if not you could try soldering this directly on to the touchpad. Peel back the black plastic covering and you'll notice a metal strip going around the circumference of the touchpad's PCB. That's a common ground, so solder on to that.

Drivers - shouldnt need them really, windows should just treat it as a standard ps/2 device, and if not it should go through the motions of adding new hardware... have you tried on any other computers? Have you checked device manager? Have you tried installing any drivers you can find just to humour XP?

Hi

Furstable I am de new member and my english is rusty

I have also a synaptics touchpad from an armada e500. I surched to plug this one in a PS2 input. The only one help i found is this post. Thanks for your help but with the Whetu order it doesn't work. That's why I test condutivity between différents pins and points on the circuit.

Colors of my touchpad pin are :

Pin1 : Black
Pin2 : Brown
Pin3 : Red
Pin4 : Orange

And I found the good order :

Pin1 / Black : +5V (I know black is funny for +VCC )
Pin2 / Brown : DATA
Pin3 / Red : CLK
Pin4 / Orange : GND

I tried this on two différents computers and it works very well. I used the connector and it's wire from an compaq mouse.

For information, you can us the latest driver from synaptics with this touchpad and you can use scrolling fonctions.