Color blobs + speaker buzz in Sylvania Superset

[TrllVl90]

Hey guys,

I've got a Superset console from the late 80s that I grew up watching. I read that these tubes were driven pretty hard, so I'm not surprised the picture isn't 100%.

I've never had a problem starting it up, no arcing noises (maybe a few minutes to warm up, because I leave it unplugged).

But the past few years it's had big red and blue blobs on the screen. I think maybe the gun isn't turning off the colors at the correct scanning point.

Also there's a buzz in the speaker that either fades in and out slowly (like over the course of 10-20 seconds) or changes volume based on how bright the image is.

The only video I could find on youtube presenting the color problem (in a different model) is in Hindi, and other than him saying the output voltage of a capacitor is 100V and should be 180V at one point, I'm not sure why he's changing the capacitor he's changing, but he's replacing a 4.7uF cap with a 10uF cap.

Here's that video: https://www.youtube.com/watch?v=bFl5OP_7FIo&t=6s

Any help any of you could provide would be great. I did find a SAMS for this TV, and I'm reading through it, but circuit analysis was my weakest subject when I got my EET.

Here's an album of the details of my set (note: there are 6potentiometers accessible through the front control, I have everything turned to the max in this album; but even turning things down doesn't eliminate the blobs or buzz): https://imgur.com/a/ZqS9k4K

Here's a quick video look of the main chassis board components: https://www.youtube.com/watch?v=spXMa0TBw60

I haven't pulled the board out because I haven't discharged the tube yet, as it says to use the "DAG ground" and that the chassis ground isn't suitable, and I'm not sure what that is (I have done some searching around here to o success, I'll re-read the SAMS again, I probably overlooked it.)

Thanks in advance for any advice you can provide, I love this set and really just want to get it into a shape where I can watch a VHS or something every now and again.

And if you need anymore information, please let me know, I provided everything I could think of based off of other posts, but I'm sure I missed something.

Sean