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geekhack Community => Keyboards => Topic started by: FiOuch on Sat, 08 July 2017, 08:25:12

Title: [Help] Some LEDs on New Poker II not turning off completely
Post by: FiOuch on Sat, 08 July 2017, 08:25:12

Hi,
I have just soldered LEDs on my New Poker II and I could use some help understanding why some LEDs do not turn off completely when I change lighting mode to OFF or to any mode where some keys do not light up.

The issue is that Shift, Z, X, C, V, B and M LEDs never turn off completely, as seen on the first image (http://i.imgur.com/3o8cJqK.jpg). The closest they get to being off is lowest brightness settings. You can see in the second image (http://i.imgur.com/XSaM3h0.jpg) that they are pretty much the same brightness as other LEDs when I set them to lowest brightness. The problematic LEDs do change brightness level just like other LEDs. Third image (http://i.imgur.com/snw3BYC.jpg) shows all LEDs on maximum brightness - they are all equally bright.

It is also very suspicious to me that all the problematic LEDs are on the same row, and the odd one is the N key LED which behave as expected (turns off completely when it should). This leads me to believe that I may have messed up some circuitry while soldering.

Do you guys have any ideas?

Thank you for any help!

Complete album: http://imgur.com/a/K77nU (http://imgur.com/a/K77nU)

Title: Re: [Help] Some LEDs on New Poker II not turning off completely
Post by: FiOuch on Sat, 02 September 2017, 15:11:12

Bump. Any ideas?

Title: Re: [Help] Some LEDs on New Poker II not turning off completely
Post by: dorkvader on Sat, 02 September 2017, 17:23:21

yeah that's weird. the LEDs I soldered in my poker 2 all work as normal. I would look at your soldering to make sure there's not anything up with that. A connection between a row of LEDs and another point on the keyboard could cause that.

If you can post good photos of the PCB it might help diagnosing also.

Title: Re: [Help] Some LEDs on New Poker II not turning off completely
Post by: FiOuch on Sun, 03 September 2017, 08:33:39

Thank you for your reply. My soldering job was pretty bad, as this was my first time desoldering and soldering on a PCB. It took me a while until I got the hang of it so first few solder points (started from ESC) are a bit criminal, but it's better later on. Even so, I do not see any connections between LED mount points and other components.

Album with PCB images: http://imgur.com/a/2B4a7
In-lined pictures of PCB:

(http://i.imgur.com/CTrRxbI.jpg)
(http://i.imgur.com/jNBbneA.jpg)
(http://i.imgur.com/T5Vxp2E.jpg)
(http://i.imgur.com/hYmZonz.jpg)