I found...

[kx250rider]

Originally Posted by freakaftr8

Can a weak horizontal driver transistor cause a sync lock issue and stretched horiz width?

In theory, there's no "weak" transistor... I'd say more likely a cap in the horziontal oscillator or sync circuit. I suppose a silicon transistor could leak, but it's unlikely, and if the driver were acting up it would most likely blow the output.

Maybe check these electrolytics: C510,512,514,517,518, and 519. Those are located on the SD board near Q504-Q505. ***These location numbers are per Sony; Sams sometimes uses it's own location numbers on early Japanese schematics.

Do you have the Sony factory book on it?

Charles