I have a BK Precision 1735A Linear Power Supply - It has two displays. Each display is on its own little daughter board. One for the Voltage which is the green one on the top. And then another for current, which is the red one on the bottom.
Sometimes the voltage readout on the top just randomly fluctuates up and down to completely random numbers.. its never an illegible random segment, its always an actual number on the 7 (or 8?) segment display.. but its just fluctuating all over the place. This is intermittent and only happens sometimes. The actual voltage output of the power supply never changes unless i move the knobs.. so that is great.. but I would like to get the voltage readout fixed.
The current display on the bottom works just fine.
I have uploaded some pictures and a video. I see a quartz crystal on the board labeled "100000" (1 with 5 zeros) - The only thing I could find on Digi-key for sale was 10mhz and 100khz which had similar numbers on them... can someone help me identify what model or frequency this crystal is, and also give some insight as to if you think this could be the problem?
The reason I believe it is the crystal oscillator is because when the problem is not happening (its intermittent) and I touch the crystal the problem returns... i think it may be temperature or something causing the crystal to drift, etc.
Video I uploaded of myself touching the crystal to recreate the problem (or so i think) (video is processing should be able to be viewed in about 10-15 min)
https://drive.google.com/file/d/1FaMwB28XaU89puKr8M0ndzrEXttKLGhS/view?usp=sharingPictures in post below