Ok I got it working kinda, the dial indicator melted but this is whats going on (fucking stupid oven, oh well). I had it setup in a weird angle in the oven but when I left it like decided to slide over and touch the side wall of the oven. Maybe I will find a big mirrored analog gauge on a flip down bracket from some simpson or something there one day if Iget it working. like the targeting system in the x-wing
When I turn it on, I need to press the Green function key then the other key then the green function key again to change anything. When it was working normally I could use the button to select voltage range, filter setting, so forth. Now I need to
1) Press green key - green light turns on
2) Press key that does whatever I want, including the frequency setting keys that are normally velocity controlled - nothing happens
3) press green key, whatever I did in step 2 occurs now
So its basically unusable. I checked all the keys for continuity (I thought one of them was shorting, but the buttons all make a multimeter peep). The local/remote switch disables the front panel but it does not make the LED next to it go off. Interestingly the 'red' shift key (like the green shift key) works, so it can do an 'auto' measurement. Setting the oscillator, offset, amplitude, etc.. is a fucking game now. Guess at how long to hold the button, feel like im playing some stupid boxing game on a NES. It seems that every key works, you just need to play games with the green key (labeled control)
I took all the keys off and tried to squirt deoxit on the little plastic they put on to act as a key, so my bad, at least they gave you push buttons, but anyway I don't think its a mechanical issue, I tested continuity on every key to make sure its not shorted out, don't think I really got water in that place. I wish you can desolder the buttons but it looks like careful reflow on plastic only
Makes me think of some kind of interrupt or something. That the green key is making something check some kind of register whereas it should normally check that automatically. But I can't just push the green key after pushing the button, I need to 'prime' it by pushing the green key and then push the button then push the green key to send it through. wtf is this behavior. like the green key is substituting some refreshing clock? something with shift registers? I also did try shorting it manually with some probes to see if maybe the button is misbehaving with like bounce but the ones that work, work, and the ones that don't, have no difference.
You think its still something with caps causing this weird ass issue? any idea what the green shift key is associated with? its something with some kinda scan I think, there has got to be a missing periodic waveform I think.
. it seems like an odd way to build a keypad, you would think everything there would cause a interrupt, why is it enabled and 'read' with the green key now? I feel like if I put a high frequency square wave as the input to the green key and disconnected the LED light it would essentially be fixed lol, but I hope there is a better way to fix it then to rig a 555 timer in there