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geekhack Community => Keyboards => Topic started by: Half-Saint on Sun, 07 March 2010, 06:35:51

Title: 1996 Model M pinout (PCB)
Post by: Half-Saint on Sun, 07 March 2010, 06:35:51

Hi,

can someone help me figure out the pinout for that 4-pin connector? I threw away the cable and I'd like to attach a new one :)

(http://www.shrani.si/t/15/i5/3pHQB3Rl/dsc0067.jpg) (http://www.shrani.si/?15/i5/3pHQB3Rl/dsc0067.jpg)

Title: 1996 Model M pinout (PCB)
Post by: ch_123 on Sun, 07 March 2010, 10:06:42

What part number? Is it a 42H?

Quote

but on the controller side you'll need to find someone that owns your model.

If it's a 42H, then it will be the same pinout as Unicomp's controllers. If it's a 52G or related, then it's the same as older Model Ms.

Title: 1996 Model M pinout (PCB)
Post by: Half-Saint on Mon, 08 March 2010, 01:44:55

Well I don't have a pinout for the controller so CLK/DATA are fifty-fifty...

Here's what I gather:
- CLK/DATA
- DATA/CLK
- GND
- +5V

Yesterday I managed to desolder the connector and while trying to remove excess solder I managed to overheat two pads (for GND and +5) which ofcourse promptly deached from the PCB... luckily there are two more I can use, if I manage not to screw them up too...

Cheers

Title: 1996 Model M pinout (PCB)
Post by: InSanCen on Tue, 09 March 2010, 01:03:55

Trace the burnt pads back to the next component. Solder your wire there. Add glue to keep it in place when finished.

Title: 1996 Model M pinout (PCB)
Post by: Half-Saint on Tue, 09 March 2010, 02:31:55

Will do! I just figured out I needed some better tools like:
- a proper wire stripper
- a "helping hands" soldering stand
- flux
- and finally some desoldering braid

After I get everything, I'm ready to fly!!! :)

Title: 1996 Model M pinout (PCB)
Post by: ch_123 on Tue, 09 March 2010, 08:02:59

Again, what part number is it? What you need to do can vary between the keyboard you're working on.

Title: 1996 Model M pinout (PCB)
Post by: TexasFlood on Tue, 09 March 2010, 08:39:29

Quote from: ch_123;162716

Again, what part number is it? What you need to do can vary between the keyboard you're working on.

Would it be on the label?
(http://geekhack.org/attachment.php?attachmentid=8235&stc=1&d=1268145508)

Title: 1996 Model M pinout (PCB)
Post by: sandy55 on Tue, 09 March 2010, 09:27:32

Quote from: Half-Saint;162472

Well I don't have a pinout for the controller so CLK/DATA are fifty-fifty...

Here's what I gather:
- CLK/DATA
- DATA/CLK
- GND
- +5V

Mine is Grenock, UK made 42H.

near control PCB
- DATA    
- CLK    
- GND  
- +5V
bottom of a PCB

Through my experience I may say that cross wiring of DATA and CLK lines may not cause fatal damage to your KB or PC as far as you connect +5V and GND lines properly.

Title: 1996 Model M pinout (PCB)
Post by: kw71 on Tue, 09 March 2010, 11:32:47

HAY GUYZ.

The ground is easily identifiable.  It forms the 'ground plane' on the pcb.  Find continuity to a screw hole or the ground plane.  That is your ground.

+5 should have some caps between it and ground near the connector.

There are a couple polarized components - ie they have to be pointing the right way wrt +5 or ground - the big capacitor and the LEDs.  

Once you find these two you can mix and match the data/clk without killing anything.  So if luck gets you the wrong way to begin with the first time you know the other way is right.

Title: 1996 Model M pinout (PCB)
Post by: Half-Saint on Tue, 09 March 2010, 13:22:28

Quote from: ch_123;162716

Again, what part number is it?

Would that be 1393669? :)

Title: 1996 Model M pinout (PCB)
Post by: ch_123 on Tue, 09 March 2010, 13:36:04

Yeah, a 139- number would be it. But I'm not familar with that part number. What sort of cable does it have? Is it...

A) A detachable SDL cable.
B) A permanently attached coiled cable.
C) A permanently attached straight cable.

Title: 1996 Model M pinout (PCB)
Post by: TexasFlood on Tue, 09 March 2010, 13:49:06

Quote from: ch_123;162790

Yeah, a 139- number would be it. But I'm not familar with that part number. What sort of cable does it have? Is it...

A) A detachable SDL cable.
B) A permanently attached coiled cable.
C) A permanently attached straight cable.

Maybe like this one (http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fsandy55.fc2web.com%2Fkeyboard%2Fmodel_m_42h1292.html%2311A0162&sl=auto&tl=en)?

Title: 1996 Model M pinout (PCB)
Post by: ch_123 on Tue, 09 March 2010, 13:51:11

Not necessarily. Not all keyboards made from 96 onwards were 42Hs. There were still a number of SDL cable Model Ms made as late as 97 or 98. Mainly Industrial ones like the 1394950.

Title: 1996 Model M pinout (PCB)
Post by: TexasFlood on Tue, 09 March 2010, 14:04:06

Quote from: ch_123;162792

Not necessarily. Not all keyboards made from 96 onwards were 42Hs. There were still a number of SDL cable Model Ms made as late as 97 or 98. Mainly Industrial ones like the 1394950.

Gotcha, I only posted the link since it's the only hit I got searching for a board with that controller.

Title: 1996 Model M pinout (PCB)
Post by: Half-Saint on Tue, 09 March 2010, 14:26:07

Yes, like that one. It's a permanently attached straight cable.

Title: 1996 Model M pinout (PCB)
Post by: Half-Saint on Wed, 24 March 2010, 15:53:04

Well, I successfully destroyed the other two pads. I'm not sure whether it's my soldering skillz or the PCB quality is just ****e... anyhow, I'm done fixing this for now as I can't figure out where to solder the GND wire :)