Edit: ALLERT ALLERT ALLERT. Please disregard the following. I think I figured out what I did wrong. It is as stupid and obvious as I thought. This is what I get for working tired and trying to hurry. I will report in Post #67 when I make the correction. Thank you for your patience. Argh.
____________________
I'm working on the Control Board and I've run into a problem.
First I replaced the whole row of 16 capacitors down the center lengthwise. Powered up. Checked with tone switch on and off. Worked.
Then I moved to the next row where you've got the eight transistors and four 100uF capacitors..Tone OFF = good. Tone ON = hissssss.
Fiddle sticks.
I checked pinouts of transistors and capacitors coming out and all seemed to match up with markings on the board. I double checked orientations everything going in.
Took the transistors and capacitors back out and checked them with little Chinese tester.
Took extra care putting everything back in with respect to cleaning up pad and good solder joints.
I feel like there is something so obvious I am going to be highly embarassed. Like persistent pinout dyslexia. Or maybe one of the board markings is indeed wrong and I missed it during the original-parts-removal. I'm using KSC1845FTA for 2SC1312.
Note: unrelated aside here is that all four 100uF capacitors C29-30 and C45-46 seemed to have slightly bulging and slighly leaking undersides.