deskthority

Bump to request additional feedback from anyone who might be able to provide it. Thanks in advance!

1) and 2) - I get .813v 3) Threshold voltage reads 1.40 when it's set to 768. Voltage measured by the first image is 1.415, which would seem to be correct. 4) Voltage measured by the second image is also 1.415 5) Voltage measured by the third image is .813, which doesn't match the 1.4v threshold rea...

I'll take some measurements later, but in the meantime: - Under significant magnification, I see no evidence of a solder bridge or any other defect in the area pointed out from the fixed image. - I don't have a hot air station, no. I'm just a keyboard enthusiast with very modest electronics knowledg...

BTW the positive values were changing all over the place when I took that screen shot - they weren't static. Only the 0 values were static. I don't know if that's expected or not.

The two row pins I have marked with sharpie dots measure .815, and the other row pins measure .817 or .818

Repeating the shorting experiment, here's the result:

Shorting the two example pins seems to bring other connections to 0 Can you confirm you shorted these two pins together to get the above result? https://deskthority.net/download/file.php?id=74716 Yes, those are the pins I shorted. I don't think anything physically moved; the pcb was pretty steady w...

Also, resistance between the two pins I have marked on the PCB reads 198k with the keyboard connected.

Thanks Pandrew. Some follow ups: 1. Shorting the two example pins seems to bring other connections to 0. See attached pic which was taken while the two pins were shorted. shorting U4 pins.jpg 2. I've been testing out of the case, including the utility screen shots I posted before and the ones I'm po...

The first row (with the majority of dead keys) appears to be a separate connection from the second row "Q" that also shows up as dead. Picture attached to illustrate. I already reflowed solder on both of those connections, on both sides of the PCB (you can see my small sharpie dot marks by the ribbo...

Also, a question for OP: do you have a key installed on that lonely red position on the second row? I’m guessing it’s the Q key so you should! If I understood the question, yes there's a 'Q' key on the physical keyboard but when I took this Pandrew snapshot I had it stripped down to the controller ...

I have a problem with a New Model F and I’m hoping the community can help. Since the keyboard arrived, it has had an issue wherein the top row of keys (1-9, etc.) is dead. I’ve been back and forth via email with Joe attempting to troubleshoot it, but so far to no avail. I’ve disassembled it, reflowe...