This was my grandmother's CRT since 1990. We bought 2 at that time, 1 for them and 1 for my parents. The second works without any problem to this day.
The TV set of that thread on the other hand, started to have some serious convergence problems and 1 month ago suddenly lost its red color.
I checked all the caps and had to replace 9 that were completely dead or had too high esr.
The CRT board has turned black from heat and most of its solder joints were in bad condition. I reflowed nearly all of them and several on power supply board.
Then the colors came back, but the convergence issues remained.
I noticed that the magnet rings had gone loose and there was no indication of how they were factory configured. I reconfigured them very carefully and patiently and the convergence problems were fixed
I was even able to enhance the colors purity. I put some drops of logo to secure them. What type of glue is suitable for this application?
Service manual and photos attached
The TV set of that thread on the other hand, started to have some serious convergence problems and 1 month ago suddenly lost its red color.
I checked all the caps and had to replace 9 that were completely dead or had too high esr.
The CRT board has turned black from heat and most of its solder joints were in bad condition. I reflowed nearly all of them and several on power supply board.
Then the colors came back, but the convergence issues remained.
I noticed that the magnet rings had gone loose and there was no indication of how they were factory configured. I reconfigured them very carefully and patiently and the convergence problems were fixed
I was even able to enhance the colors purity. I put some drops of logo to secure them. What type of glue is suitable for this application?Service manual and photos attached
Attached Files
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