Tektronix 4107 service/schematic
From
frank@21:1/5 to
All on Sun Dec 3 18:03:55 2017
Hi all,
a few days ago I powered up my Tektronix 4107, as I do with all the old hardware to check their health from time to time. It appears to be dead,
the keyboard led (on caps lock) just blinks forever, screen remains dark
but pressing the self test button gives a white-ish screen with raster lines visible (but rather compressed on top). Reset button seems to have no effect.
I haven't been able to find a service manual or even only the schematic
on the internet. I didn't even figure out how the electronic PCBs can be removed and possibly powererd out of the frame to allow some scoping
around for signals (CPU clock, reset line, IRQ etc...).
Does someone have the service manual for this terminal or can give
any useful hint?
Thanks in advance and best regards.
Frank IZ8DWF
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