Re: Tek 7844 Alphanumeric Display Issues


We already replied to you that the fault is most likely to be in the auxiliary input of the 2nd Vertical amplifier, and that the readout vertical position pot is R2700 on the vertical amplifier board.

If you are asking where to find schematics of the EPROM version of the readout board, I can't help, but none of the original boards had a vertical position pot on the RO board, and none of the later 80C31 versions did either, so its my bet that the EPROM version also didn't.


-----Original Message-----
From: <> On Behalf Of Liam Perkins
Sent: 22 April 2021 05:34
Subject: [TekScopes] Tek 7844 Alphanumeric Display Issues

I have a 7844, ser. no. B173417, that works fine but for the character
display which is shifted upward 5 divisions, making of course the top
portion of the display invisible.

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