1960s Sylvania Color TV: My first all tube color TV

[vortalexfan]

Originally Posted by Electronic M

For chassis removal I forget if the D12 was this way(I think so but it's been like 5 years since I had mine apart), but the D16 definitely is....On Sylvania sets of that era the chassis slides into 2 side rails and locks to those rails with 2 rear facing screws. Remove the screws and unplug all wires and the chassis just slides out the back.

I've never worked on 80s inline sets or seen what you describe. Delta gun sets like this Sylvania don't care about orientation* and replacements were shipped face down.
*In service they would sometimes need purity adjustment and or degauss when moved from facing north-south to east-west but no permanent issues otherwise.

OK so it sounds like it what I experienced with the 1980s Color TVs was something unique to the inline gun style picture tubes which were more common then, whereas the Delta Gun style picture tubes from the 1960s and 1970s didn't suffer from the issue I described.

[vortalexfan]

And thanks for the advice for how to go about removing the chassis from the cabinet, this TV I'm working on does have legs but I'm not sure if I want to fiddle with trying to remove them and trying to move this TV to my work bench in the basement, as it is kind of heavy. so I think I'll try Electronic M's Advice and see if I can just slide the chassis out of the cabinet.

[old_tv_nut]

Barber pole effect is a color oscillator/AFC adjustment issue. The oscillator is running, so the crystal is likely OK. Color demod and/or color outputs cannot cause this.
Lack of oscillator lock could also be caused by burst gate/burst amplifier problem.

[Electronic M]

In the vertical circuit I would look at out of tolerance resistors and maybe leaky capacitors.
Having owned 3 different color Sylvanias I've found that when the vertical is off frequency subbing the vertical tubes usually doesn't help.

[vortalexfan]

OK, thanks.
I'll look into the vertical deflection board and see if there are any bad resistors in there or capacitors.

Although I would be kind of surprised that with this thing using mylar caps in most of the circuits that there would be any leaky capacitors causing any issues, but then again anything can happen in a 50+ year old TV...

[vortalexfan]

OK so I had ordered a couple of new Vertical Output/Oscillator Tubes for the TV because I wanted to see if that would make a difference in the operation of the vertical operation, and I installed a new 6LU8 tube into the TV and the TV did something it never did before which was that some of the components on the sweep section board started arcing against each other and then the Horizontal Output Tube was arcing between the grid cap and the High Voltage Cage.

The TV does have a fair amount of dirt and grime built up on the circuit boards themselves but the inside of the HV cage and the Picture tube itself are spotless which is why I said I thought it might of been a low hours set but the dirt and grime buildup on the boards was just from the fact that the TV was stored in the previous owner's garage for many years.

Would the dirt and grime buildup on the circuit board be the possible cause for some of the arcing I'm seeing inside the TV?

[vortalexfan]

Here's a photo of what the TV is doing right now.
Pardon the glare on the screen, the room I'm working on the TV in has two south facing windows which were creating some glare on the screen, and the color setting on the front of the screen was turned all the way down which is why there's no color right now (I want to try and get the vertical deflection and AGC issues straightened out before I concern myself with the color issues.)