As some of you may be aware disabling SVM via the service menu seems to be impossible. When you exit out of the service menu your setting is overidden when using personal picture mode (as I hope you all do). To overide this "feature" remove decorative bottom panel the one with the glass, this just pauls off from either end with a sharp tug. Then remove the 4 screws holding the hardboard cover protecting the CRT guns. You should be able to see the 3 Guns. Middle is Green (ZG board) on this board look for pin connector CN7608 its location is on the right of centre on the ZG board first row of connectors to the right of the gun at the bottom. Pin 1 which is a white wire needs to be removed / cut from this connector. I managed to remove the pin itself (just incase I need to put back for warrantee) by using a watchmakers screw driver to push the lug of the connector whilst gently pulling on the wire (whislst the connector was removed from the ZG board). Put the connector back and SVM is permanantly disabled in all picture modes. I would suggest using AVIA contrast test B4 doing this modification. You will notice the bottom black line in the white segment is over twice the thickness that it should be. Once SVM is disabled the line is now the correct size. Please be aware i'm not a TV technician, all the above was worked out by following the circuit diagram within the service manual between the E board and the ZG board. If anyone knows a easier way of defeating SVM then please post.
THANKS
THANKS