pishta wrote: > Phillipe, I have 3.5V on right side of R52 (coincides with pin position > 6 of VFD that I was asking about earlier. What role does the 470 MN6 > ferrite coil looking thing L7 have to do with 55V rail? I show > continuity across it just like the one I pulled off a dead board. Is it > in fact a 10:1 wound boost transformer? Found the inductor is just a single wire coil around a ferrite core. Im still investigating the high voltage "cap and diode ladder" design. Everything is testing good off board. Thinking no high voltage display voltage its a burned '351' FET right above the 470 inductor. Its the square wave triggered switcher for the inductor.
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