Tektronix TDS 744A teardown and repair 2 скачать в хорошем качестве

Tektronix TDS 744A teardown and repair 2

I continue working on the 1990s Tektronix TDS744A digital 4-channel 500 MHz oscilloscope. My plan was to fix the colors, but I ended up taking a closer look at the switching power supply board, testing and replacing a lot of high ESR electrolytic capacitors, fixing a board damage from electrolyte leakage and relubricating the fan. I did some experiments with the sequential color system. The color shutter has no voltage going into it. There's definitely a problem in its driver, but the shutter itself might be deteriorated too. For now, I decided to remove the color shutter. This gives me a bright monochrome picture. The oscilloscope is perfectly usable this way. I might try to put the shutter back in and fix its driver, but I'm not sure I want to spend my time on it, risking an accidental damage, as this oscilloscope is perfectly usable as it is now. This old Tektronix oscilloscope uses a CRT-LCD hybrid display technology - a monochrome CRT tube with a solid state sequential color filter (liquid crystal color shutter / LCCS / LCS / NuColor). The 1st episode:    • Tektronix TDS 744A teardown and repair   Please support my channel on Patreon:   / diodegonewild   Instagram:   / savage_danyk