Interesting about the Emitter corresponding to that dot, I didn't know that.
So I measured the rest, and here's what I'm getting:
Q8: BE 2.186V, BC 1.447V, EB 0.717V, CB 0.707V, CE 2.075V
Q7: BE 0.567V, BC 1.079V, EB 0.567V, CB 0.722V, CE 0.818V
Q6: BE 0.601V, BC 0.625V, EB 0.997V, CB 0.961V, CE 1.396V
Q5:
Q4: BE 2.031V, BC 1.446V, EB 0.718V, CB 0.710V, CE 1.899V
Q2: BE 1.922V, BC 0.534V, EB 0.674V, CB 0.532V, CE 1.977V
Q1: BE OL, BC OL, EB 0.724V, CB 0.717V, CE 1.901V
Q5 is apparently a JFET, which I’ve never heard of before, but looks like it’s similar to a MOSFET, I’ll have to read more into it. I tested that using the resistance setting, although I’m not sure it tells us much… But at least nothing seems shorted out.
Q5: GD & GS 6.86MΩ, DG & DS rapidly increasing in the MΩ range, DS & SD about 190Ω
Do any of the above values look odd?
Pressing BEAM FIND results in a bright dot on the screen.
RESET lamp is off.
Selecting NORM mode, the RESET lamp is still off, and rotating the TRIGGER level below it does not change anything, the RESET lamp stays off.
Selecting NORM and EXT, and putting a piece of bare wire into the EXT trigger input BNC centre pin changes nothing, RESET lamp stays off, and screen stays blank (only green background).
Good to know for the HV!
I’ll measure the transistor voltages and post again once I’ve got them.