deskthority

hi folks,
So I received my Phantom PCB with diodes,
I soldered all the diodes and checked them with a multimeter -> all good, no diodes shorted and all of them are soldered correctly, - pin on the square pad.
I soldered the teensy and uploaded the ANSI win firmware from bpphany -> seems all right
Problem is I have non working keys.
I didn't solder any switch so I plugged the board and checked voltage for each switch and some of them show 0V (confirmed by a writing test in a notepad)

I have very few electronics knowledge so I might be missing something obvious or I might be testing things wrong so here is my question:

If you come accross a faulty switch what are the steps you use to try and fix it.

Switches are the easiest thing to test. Continuity test the pins of each one. Your multimeter should have a mode for that: where it beeps when things are good. Just keep the keyboard unpowered if testing them after soldering into place.

you test the board without soldered switches?
what does OV mean?

I really don't understand what you doing and what are you talking about?

Dunno If I am doing it wrong but continuity test gives me nothing even on the working keys (I point each switch pin with the multimeter on continuity mode)
I tried aquakey and here is the result



the right alt is now working (I forgot to solder the diode)

I resolder every diode on the faulty keys and same result.
I also reloaded the firmware and tried both win and winkeyless.
Problem is still here.
So now I guess it has something to do with the teensy.

Can the faulty keys pattern be linked to a specific teensy leg?

CeeSA wrote:you test the board without soldered switches?
what does OV mean?

I really don't understand what you doing and what are you talking about?

I didn't solder any switch cause I don't have the plate yet,
so I plugged the board and checked tension between switch pins,
on faulty keys it shows zero Volt

I also do it in continuity mode, same result

ah ok, I see. I would follow a trace route of one faulty key until the connection to the teensy.
To me the "lines" of faulty keys looks like a non functional trace.

It looks like you did not solder all the pins to the Teensy correctly. There are not only the pins in lines near the edges, but also three pins that are inside lines edges. One of these connect to F4, 6,T, G and V, another connects to F2, 4, E, D and X. Escape, 1, Tab, left Shift and left Ctrl also share the same trace.

Findecanor wrote:It looks like you did not solder all the pins to the Teensy correctly. There are not only the pins in lines near the edges, but also three pins that are inside lines edges. One of these connect to F4, 6,T, G and V, another connects to F2, 4, E, D and X. Escape, 1, Tab, left Shift and left Ctrl also share the same trace.

THANKS!

I completely missed this in the instruction guide