7704A bottom readout out of position

Thierry Delaitre


The bottom readout line on my 7704A appears to be out of position and has gone up - it is located at one third of the screen from the bottom. The one at the top is ok and well positioned. I tried to use the vertical separation pot but if I use it, then the top line goes up outside the CRT. I've replaced the tantalum capacitors on the readout board and the voltages appear to be spot on. do you know what I could try to troubleshoot?



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