t0nito
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Jun 27, 2014, 8:23 PM
Post #11 of 16
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Re: [jts1957] GE 9-7500 (Panasonic PV-2700) Power supply problem
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Looks like the VFD is the culprit all along, I guess it's shorted, tester shows continuity between pin which I guess it's normal because it a filament, but I've isolated the pins and used an external power source, I've tried the 5V source with a resistor, no load was 4V when conected to the filament it dropped to 2.3V and the displa was off, used a 9V battery with a linear regulator set to 4V and when connected to the display it dropped almost to zero, I started to raise the voltage on the regulator and it was near zero all the time even after setting it to max, display was off all the time. Funny thing is that if I connect one of the filaments to the original source and the other pin to ground it will actually work but very dim, like half normal brightnress or less. I don't know if I could leave it connected like this or if it will strain the SMPS. A dim display is better than no display, but a working VCR is better than a dead one, what are your thoughts on this?
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