Chassis# CTC169BG2 modle# F35100ST / i turn on the set and it works for aprox. 5-10min then the image shrinks to about an inch horizontaly. has anyone had this problem? how can i fix this? does anyone have a schematic of this set? thanx

Your fault should be either bad connection to the horizontal deflection yoke coils or bad associated components.

if the line is vertical, you lost horizontal deflection. one of these caps are bad: check C4401, C4402, C4403

if the line is horizontal, then you lost vertical deflection, check vertical circuit.

how do i check the vertical curcuit?

someone else suggested that my fault should be either bad connection to the horizontal deflection
yoke coils or bad associated components. any thoughts on this?