Looking for Tektronix 4051 or 4052 Display Board

Ian Finder ian.finder at gmail.com
Tue Jul 3 15:35:26 CDT 2018

These systems are rare enough that it's probably worth fixing instead of
treating the board as a simple FRU. There are schematics on bitsavers for
that board, and they are complete.

On Tue, Jul 3, 2018 at 1:21 PM, Monty McGraw via cctalk <
cctalk at classiccmp.org> wrote:

> 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

   Ian Finder
   (206) 395-MIPS
   ian.finder at gmail.com

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