Author Topic: Ripped off a pad along with its trace  (Read 2445 times)

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Offline SHeG

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Ripped off a pad along with its trace
« on: Sun, 20 November 2022, 02:12:00 »
HelloI decided to "repair" my old keyboard tesoro lobera (`50 % of the switches were dead) all was going great until I didn't lose my concentration and killed my TAB button and with it CAPS and left SHIFT stopped working as well...

https://imgur.com/a/mhv4zYO
https://imgur.com/a/n3MZYf0

Is it possible to save it?

Offline suicidal_orange

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Re: Ripped off a pad along with its trace
« Reply #1 on: Sun, 20 November 2022, 04:29:54 »
Almost certainly fixable :)

Solder a tiny wire from the pin of the Tab switch to the diode (red line in pic) to replace the lifted trace as that's obvious.

Looks like the diodes are connected across the rows so hopefully the PCB was designed by a sane and sober person.  Plug it in and touch a wire between the green and red dots - hopefully it will type Tab and Caps.  If it does you can solder solder wires from green to both blues and I wouldn't be surprised if Shift starts working on it's own.  Don't forget to unplug it before soldering :thumb:

293464-0

If it doesn't type the right thing when you short it I'll have another look but black PCBs are annoying so more shine (like the right of this pic) in the bit between Caps and A would be good.
120/100g linear Zealio R1  
GMK Hyperfuse
'Split everything' perfection  
MX Clear
SA Hack'd by Geeks     
EasyAVR mod

Offline SHeG

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Re: Ripped off a pad along with its trace
« Reply #2 on: Sun, 20 November 2022, 07:23:02 »
 :(eh, its trigger ~ and F1 keys. I tried to wire it from different places but not a single TAB CAPS or LSHIFT 
https://imgur.com/a/ZqbXK0P

Offline SHeG

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Re: Ripped off a pad along with its trace
« Reply #3 on: Sun, 20 November 2022, 07:29:44 »
:(eh, its trigger ~ and F1 keys. I tried to wire it from different places but not a single TAB CAPS or LSHIFT 
https://imgur.com/a/ZqbXK0P
maybe it's because the lifted trace fell before I soldered it?

Offline SHeG

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Re: Ripped off a pad along with its trace
« Reply #4 on: Sun, 20 November 2022, 09:40:12 »
Okay, I figure out how to get my TAB key to work. I tried every key with wire from the TAB (diode 38) and when I connect it to backspace it types.
So, as I understand. I need to solder diode 38 with the right leg of the switch and then to BACKSPACE. Same I need to do with CAPS and LSHIFT but solder the right legs of both switches to BACKSPACE.  Is that correct?
https://imgur.com/a/nbecdnR
Dear Mr. suicidal_orange  thanks for helping me out wouldn't come even to this method by myself. :-*



Offline suicidal_orange

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Re: Ripped off a pad along with its trace
« Reply #5 on: Sun, 20 November 2022, 10:38:26 »
So, not a sane and sober designer!

You have the right idea but you need to solder from the left pin of backspace to the left leg of the broken switches, otherwise they will be constantly "pressed".  This is assuming backspace to diode 75 and 58 also types the correct thing, which it may not.
120/100g linear Zealio R1  
GMK Hyperfuse
'Split everything' perfection  
MX Clear
SA Hack'd by Geeks     
EasyAVR mod

Offline SHeG

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Re: Ripped off a pad along with its trace
« Reply #6 on: Mon, 21 November 2022, 04:54:41 »
Yay, it's fixed!

https://imgur.com/a/97GoE3p
So brief summary of what I did, maybe it will be useful for someone with the same problem (But pretty much suicidal_orange solve it all)
The red wire goes from diode 38 to the right leg of TAB switch (I lifted both right and left pads) I pulled a long wire to backward of the PCB  After blue wire from the left leg of TAB switch to left leg of BACKSPACE switch. And finally, yellow wire from the left leg of LSHIFT switch to  left leg of BACKSPACE switch after this CAPS starts working as well. Tested all keys works perfectly fine.

Suicidal_orange thanks for the helpful advice!  Would be doomed without you.