Greetings, I thought some knowledgeable person would be able to suggest the location of the fault in my 475a, if I describe the symptoms. Intermittently, the vertical section goes wacky. The displacement is only a fraction of what it should be, and the two vertical position controls are no longer independent, in other words, they move both channels, by different amounts. Can only get a line from channel one barely up to the center of the screen and channel two only about a quarter of that. And then, for short periods of time, everything seems to work fine. Also, the (bad) behavior slowly changes as it warms-up.
I know very little about electronics (started this project to learn). I'm guessing that there is a diode somewhere that is supposed to separate the channels. Any thoughts?
Thanks, kw
I know very little about electronics (started this project to learn). I'm guessing that there is a diode somewhere that is supposed to separate the channels. Any thoughts?
Thanks, kw