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geekhack Community => Keyboards => Topic started by: rethus on Thu, 04 December 2014, 05:34:12

Title: Ergodox Trouble with some Keys
Post by: rethus on Thu, 04 December 2014, 05:34:12

At the moment I have some trouble with the marked keys.
They don't work any more.

(http://storage7.static.itmages.com/i/14/1204/h_1417692821_3703931_2a6f5914cd.jpeg)

Can somebody give me a hint, which Lines on the PCB i should test to found the error?

Title: Re: Ergodox Trouble with some Keys
Post by: czarek on Thu, 04 December 2014, 05:48:55

I would start with checking if any pins are not shorting the ground. My first suspect would be this red key in thumb cluster.

Title: Re: Ergodox Trouble with some Keys
Post by: rethus on Thu, 04 December 2014, 06:21:10

I've jolted each of them, and inspect the SolderingPoints. Looks all good.

I think it's a cold soldering-Point on the Tensee?
Is there a plan so I could figuer out which pins on teensy I could check?

Title: Re: Ergodox Trouble with some Keys
Post by: rethus on Thu, 04 December 2014, 06:56:49

Ok, it's on the teensy.
Pin 5, lower row from left seems to make the trouble.

(http://storage5.static.itmages.com/i/14/1204/h_1417697910_5565081_0cb451e037.jpeg)

At the moment, it works again, after resoldering this pin.

Title: Re: Ergodox Trouble with some Keys
Post by: plainbriny on Thu, 04 December 2014, 07:08:08

Quote from: rethus on Thu, 04 December 2014, 06:56:49

Ok, it's on the teensy.
Pin 5, lower row from left seems to make the trouble.

Show Image

(http://storage5.static.itmages.com/i/14/1204/h_1417697910_5565081_0cb451e037.jpeg)

At the moment, it works again, after resoldering this pin.

That's odd, based on traces on PCB, it should be something to do with D3 (third pin from the lower right), pin 5 from left (B3) is connected to the column of "8ik,".

Title: Re: Ergodox Trouble with some Keys
Post by: rethus on Thu, 04 December 2014, 07:11:35

You are right. Seems that I have resolderd B3 and it works... but only for short time.
Now I have resolderd D3, and it works again :)

Hope to got the main failure now  :thumb: