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Vectrex - screen compresses slightly when moving joystick


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#1 fugu OFFLINE  


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  • Location:Germany

Posted Mon May 15, 2017 12:03 PM


I just received my Vectrex which is a NoBuzz Version.
All fine, except one thing...
I have tried to capture the effect in a short video (link below), but I am not sure if this comes across well?

The problem is if any of my controller is plugged into 1st player and I move the Joystick, the screen becomes horizontally compressed.
This becomes very visible when text is displayed.


Checksum = 7ADB


If anyone has any idea of possible root causes, that would be really fantastic.

Many thanks for your help in advance.

Best regards,



Attached File  Vectrex.MP4   5.62MB   5 downloads



I have posted this already at Facebook, but with no response:




Edited by fugu, Mon May 15, 2017 12:23 PM.

#2 KylJoy ONLINE  



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  • Location:Kansas

Posted Mon May 15, 2017 6:56 PM

Well, I believe you have a problem with an IC. I seem to remember that happening with one of my Vectrices (I have no idea what is plural for Vectrex) and swapping out one of the ICs alleviated that symptom. I cannot remember which IC though. Perhaps the field service manual would be helpful. It is online at several places. It is likely the IC related to analog inputs.

This is one of the reasons I have two of everything... component swaps for troubleshooting.

#3 fugu OFFLINE  


    Combat Commando

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  • Location:Germany

Posted Tue May 16, 2017 2:39 AM

Hi KylJoy,


many thanks for pointing direction.


Can anyone help me which IC(s) could be the rootcause?


Many thanks in advance.


Best regards,





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