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geekhack Community => Keyboards => Topic started by: Jahakob on Wed, 10 April 2019, 12:46:34

Title: [solved] How to fix my PCB?
Post by: Jahakob on Wed, 10 April 2019, 12:46:34
Today I desoldered my Vortex Race 3 to get rid of the MX blues it came with.

When I soldered in the new switches I noticed 2 key right next to each other stopped working. (LD26 & LD27)

While I was troubleshooting I noticed that the two left connectors to the pin might somehow be at fault. (marked green in the second image), since I can bridge the right ones to create a keystroke but not the left ones.

The Diodes seem ok to me. But I am out of ideas at this point, what the problem is. Please help me :)
Title: Re: How to fix my PCB?
Post by: tp4tissue on Wed, 10 April 2019, 13:07:17
measure between the 2 green circled,   if they're connected, then bridge either one to any ground with wire.

Then short the connection see if they work.
Title: Re: How to fix my PCB?
Post by: Jahakob on Wed, 10 April 2019, 13:26:39
Thanks for the quick answer! I am not sure tho, where a ground pin would be on this keyboard.
Title: Re: How to fix my PCB?
Post by: Jahakob on Wed, 10 April 2019, 13:51:30
measure between the 2 green circled,   if they're connected, then bridge either one to any ground with wire.

Then short the connection see if they work.


I tried connecting it to a led ground pin. That didn't seem to do the trick. The two are definitley connected tho, according to my multimeter.
Title: Re: How to fix my PCB?
Post by: tp4tissue on Wed, 10 April 2019, 16:16:44
/Head scratch

When you said you can bridge the -Right ones- to create a keystroke, what did you mean by that, where did you bridge to
Title: Re: How to fix my PCB?
Post by: Jahakob on Wed, 10 April 2019, 17:35:23
/Head scratch

When you said you can bridge the -Right ones- to create a keystroke, what did you mean by that, where did you bridge to


I did it now. I desoldered everything to look at it from the front. From there I could check all the connections of the solder points. I used the multimeter to identify the faulty one, which i bridged as you said. Thank you for your help!