Vertical Diffusion I am having a problem with one of the TV/VCR Combo sets, it has not diffusion of the picture vertically. I have a lot of experiance in electronics, I will resolder the board. But if this does not work, I would like to know what it is I have to repair and if at all possible what it looks like. Thanks you

Did you have the panel out of the TV and replaced the diffusion lenses that had fell off?

The line is horizontal but means no vertical deflection (set deflects picture from middle to top and bottom.

Either bad solder connections at vertical output chip or a bad part somewhere in that circuit.

It lost Vertical sweep either due to open fuse resistor feed the Vertical output circuits, failed vertical/oscillator IC, failed Vertical york (on the neck of the picture tube). Those are what you need to check. This is CRT TV, the repair shop will charge at lest $35 to tell you what I just indicate, to repair it iwll more likely to be in $100 range.
Please leave rating if it helps.

If the line is half way up the picture. This is a vertical problem. Most likely the vertical output IC or a bad solder joint near the IC.

Bad vertical deflection circuit, unless you have a bad connection (bang on set to set it it fills out for a second) . you will need components replaced such as the IC, capacitors possibly a fuse from the power source to the vertical IC.
If its a bad connection soldering the IC pins is not to hard if you are OK with taking it apart yourself.
gd lk
Eric

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

You lost your vertical sweep. most likely the vertical output IC or a power supply source is the problem.

if there is only one horizontal line you have a problem with vertical deflection section

This set will need to be serviced by a tech shop as you have a problem called "vertical foldover"...accordianman

If you fix the vertical cirrcuit correctly, there is no need to go into service menu as your vertical should go back to normal. Re-check your work. I remember one cap on this set that gets overlooked all the time so you may want to check it. It is cap C413 - ceramic cap and sometimes it shorts causing a vertical shrinking as you described. Good luck.

I had white lines 4" thick vertically for about a week, then one day powered the unit up and with in 3 seconds there was a loud pop from the rear or the unit. Any one know what needs to be replaced?