CRT repair advice
Hi all,
I’m looking for some advice on repairing my Sansui TVS2746. I believe it has vertical foldover. The TV sat in a house without AC/heat for about 2–3 years before I got it. When I first turn it on, the picture has what looks like vertical foldover. I ran 240p Test Suite, and I attached pictures of the issue.
One detail that may matter: the foldover/lines seem to go away after about 15 minutes of being on(2nd and 5th image come from), but then the issue comes back later. Also, when the lines go away, the image looks vertically stretched.
There is a TV repair shop about 30 minutes from me that supposedly still works on CRTs, but I’m considering attempting the repair myself instead. Is this a bad idea for a first CRT repair?
I have built PCs and done some soldering before, but I know this is very different from working on a PC motherboard. My main concern is CRT safety, especially properly discharging the tube and avoiding dangerous areas of the power supply.
For this kind of vertical foldover/stretching issue, should I be looking mainly at the vertical deflection circuit, electrolytic capacitors around the vertical IC, bad solder joints, or something else? Any advice on where to start, what parts to check, and what not to touch would be appreciated.