3 Jul
2018
3 Jul
'18
1:21 p.m.
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