I have a problem with my TV, occasionally the picture disappears down to a thin blue line across the centre of the screen, then eventually it rights itself.
I have been told it may be a problem with the Y-scan, but what is the Y-scan??
Seems your tv has a Frame Time Base fault probably due to bad solder joints.
Best take it to a qualified repairer and refrain from turning it on until it is fixed to prevent the fault getting serious.
xyzbird
October 2008
X and Y axis as in drawing a graph.
On a raster TV; where the "spot" flys across row after row to build up the picture, the Y axis circuit determines where the row is positioned in the vertical axis. You've got plenty of action in the X axis because there's a line going across but not much happening in the Y axis.
Y-Scan is the gradual change in height for each successive X-Scan across the screen. - Leastways that's what I learnt in the 1960s...
Peccavi
October 2008
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