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geekhack Community => Keyboards => Topic started by: guyga on Sun, 29 December 2019, 21:51:53

Title: Failed build - please help
Post by: guyga on Sun, 29 December 2019, 21:51:53

I built a keyboard and it worked fine until I put it back in the case, after which it stopped working. I suspect the cable got squeezed. The cable is connected to the PCB at a point that’s hard to reach without desoldering the whole thing. Is there a way to debug this and possibly replace the cable without reaching the connector to the board? Perhaps by cutting the cable and soldering a new cable to each of the USB 5 wires?

Title: Re: Failed build - please help
Post by: powwu on Sun, 29 December 2019, 21:59:55

What PCB did you build with? I assume the cable isn't removable from your description?

Title: Re: Failed build - please help
Post by: guyga on Mon, 30 December 2019, 02:47:13

I used this DM87 kit which includes a PCB and cable:

https://www.amazon.com/dp/B07WHG4CDJ?ref=ppx_pop_mob_ap_share

The cable is removable in principle, but its connected to the PCB between the plate and the PCB, so in practice I can not remove it without desoldering the switches and separating the plate from the PCB.

Title: Re: Failed build - please help
Post by: Leslieann on Mon, 30 December 2019, 03:29:41

If you can reach the smashed part you may be able to just remove the coating and re-wrap each wire without even cutting them.

Title: Re: Failed build - please help
Post by: guyga on Mon, 30 December 2019, 03:54:03

Interesting idea. Thanks!