Author Topic: Just looking for some help to fix my GON  (Read 1721 times)

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Offline Fullcream

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Just looking for some help to fix my GON
« on: Thu, 23 June 2016, 18:55:47 »
Hello. So this is something that has really been doing a number on me recently. It appears I have accidentally fried something on my Nerd60. I am just wondering if you guys can maybe figure out what it may be and if there is some parts that may be worth trying to replace on the board or if there's is so many possible things that could be wrong and so it may not be worth trying to repair at all. Which would be very frustrating because I really like these boards and don't want to have to wait over 2 years for GON to ship one out.

NOTE: The following is somewhat irrelevant, if it is too boring then skip down to the *

Ok so in the first place my nerd60 was purchased through a GB with presoldered diodes and resistors. Everything worked fine. Now I was dumb and instead of purchasing 1.8 LED's I used 2x3x4 LED's which causes issues with keycap clearance with cherry profile. This is a huge issue for me as I only ever use cherry profile. Seeing how popular cherry profile and gmk sets are it is a wonder that I see so many people soldering in 2x3x4 LED's in their switches. I wonder if when using cherry profile keycaps that people actually feel/hear that something is not right? Anyway yeah that's your 2x3x4 LED interfering with the underside of the keycap and not allowing the switch to bottom out properly.


So what I did to deal with this was put some foam inside the keycaps, this part right in the center, (don't know what to call it)


I made sure to evenly cram the same amount into each keycap this would stop each keycap from fully pushing down onto the stem which allowed more room between the switch top and incorrect size LED so that now the switch can bottom out properly. And I knew that this would make my keycaps sit about 1-1.5mm higher so there would be an ugly gap around the sides of my case. But that's ok because I've always hated even minimal gap around the sides and when I built my case:
https://geekhack.org/index.php?topic=82854.0
I purposefully designed it with a slightly higher than standard lip like the sides of a kbp v80 or an irapid/novatouch.

So I started reading on here about LED sizes and came across a thread where basically a seemingly informed person was giving advice to someone wondering what size LED's to get and this user said with 2x3x4 LED's they can often be placed underneath the switch top, this is good if you never want to worry about keycap clearance. It looks cleaner and you won't have to desolder to remove switch tops. Of course only do this if you have clear switch housings otherwise you won't even see the light from the LED.

Of course you are thinking well I could have just soldered in sip sockets and use them with proper 1.8 LED's but I didn't even know about them and now it's too late.
Anyway here is a picture of the bottom 3 rows I have done with the LED's underneath the switch top.



Oh and in case you are wondering what is going on with my stems. Yeah I'm strange and for some reason I really prefer mx clears over Zealios. So I'm also in the process of putting mx clears back in.

LOL here is the * I recommended you to skip down to if it's too boring
All I wanted to do is desolder the LEDs, remove switch tops, push LEDs down further underneath the switch housing and solder them in place there. Firstly I did the whole middle row and then plugged the board back in to check if everything is working, it was fine. Next I proceeded with the bottom 2 rows, after I plugged the board in to check everything and now the following switches are not registering



Looks like a pattern. I am always very careful with soldering and I don't recall using too much heat or slipping and hitting a diode or resistor or anything. Not even sure what they look like. Here is a pic of my pcb:


Ok so the reason you some yellow thing there is that I know I just said I'm very careful when soldering however in one of the holes for the negative pin of the LED, when I desoldered it there must have been a very slight lip of solder left on the edge and even when I gently pushed the led pins back in it pushed the trace out of the pcb. Because it didn't quite push it up very far I figured the connection might still be there so I soldered to it anyway. The LED worked but not for long so I used a wire to connect the - pin to the next - thing that you solder pins to which happened to be unused and then the LED worked fine. I have no idea whether this whole process may have played a part in my board now not working properly but I thought It was worth mentioning. Here is a shot up close.


So probably the important note is that after I did the middle row everything was still fine and whatever I did that was so bad happened while I was desoldering or soldering up the bottom 2 rows. And one of the 2 rows that are now not functioning I had not even touched yet.

Oh dear what have I done?
Any help is greatly appreciated.


Offline Fullcream

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Re: Just looking for some help to fix my GON
« Reply #1 on: Thu, 23 June 2016, 21:19:42 »
IT'S OK I FIXED IT  ;D
as I was drowning in my sadness I picked up my pcb and stared at it for a good 5 minutes and noticed the tiniest thing.
A microscopic piece of solder had somehow maybe gone flying from the suction of my solder sucker and perfectly landed on 2 pins coming out of the main Atmel chip and was obviously shorting them. Immediately I thought this must be it because I have not done anything wrong. With tweezers the piece of solder just broke off easily as expected. Plugged the board in and everything is working!

I just want to the very small amount of people that read this thread. If you go with 2x3x4 leds and don't plan to go with sip sockets, also if you are happy with your colour of led and are positive you will never want to change it and you happen to have clear switch housings then it might be a good idea to solder your leds under the switch housings

Offline MOZ

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Re: Just looking for some help to fix my GON
« Reply #2 on: Thu, 23 June 2016, 23:45:09 »
Congratulations, it's working again.

Offline Sifo

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Re: Just looking for some help to fix my GON
« Reply #3 on: Fri, 24 June 2016, 01:00:02 »
Desoldering LEDs on Korean PCBs suck :\ You're lucky if you can do it successfully once without good equipment.
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Offline axtran

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Re: Just looking for some help to fix my GON
« Reply #4 on: Fri, 24 June 2016, 08:37:45 »
Under switch LEDs sit at an angle which BLAST YOU IN THE EYES. Don't be cheap or lazy, just go get SIP sockets. Speaking from experience.


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