VT101 screen adjustment

Swift Griggs swiftgriggs at gmail.com
Mon May 9 09:03:37 CDT 2016

On Sun, 8 May 2016, Adrian Graham wrote:
> Anyhoo, the VT101's screen is showing the 
> stretch-at-top-compress-at-bottom issue, is that adjustable using the 
> troubleshooting guide in the technical reference or am I looking at 
> replacing some caps?

It sounds like a problem with what they call "deflection". I don't know 
about VT101's specifically, but there are usually a set of pots on the CRT 
logic board (the PCB mounted on the rear of the tube) you can adjust for 
such things. Check out this section of the Monitor Repair FAQ:


Depending on the type of distortion you are seeing, you'll need to adjust 
the pots to compensate.


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