I've been repairing my Tektronix 4052. I've got the digital logic working - but the text and graphics are messed up.
I posted photos of the screens in my Tektronix 4052 troubleshooting thread on vcfed. With a scope on the final X amplifier stage - it is oscillating - so I see weird horizontal strokes instead of dots for text. I know from the service manual that this circuit includes a feedback loop, and with the scope I see oscillation all around the loop - so I haven't found the source. Does anyone have a spare Tektronix 4052 (or 4051) Display Board that I could buy? Thanks, Monty
