Hi!
There is the story:
Oscilloscope was working pretty well but there was disturbing smell coming out while powering up.
After taking it apart, I saw four electrolytic caps leaking (on A5 board). Ive replaced them and repaired few etched copper traces. There was a lot of oxidation in caps surrounding, so Ive cleaned it with flux removal and distilled water (only where needed - not whole board).
After powering up my tek, I realized there are some issues:
1. One of the markers is constantly shaking. You can see this on video below. I can live with this, but all four channels (inputs grounded) are also not very stable (verticaly shaking). It drives me crazy (but it is hardly visible in video).
https://www.youtube.com/watch?v=tk_9U6uKQtQ&feature=youtu.be2. First channel is always visible (even when its off). The best explanation is on the vid below:
https://www.youtube.com/watch?v=2hgtawLPF7s&feature=youtu.beIts my third day of fighting with the A5 board.
There are no errors (all tests passed).
Power supplies are good (there is some excess ripple - need to check this again).
But it was all ok before repairing A5 board...
Does anyone know what may cause this problems ?
Can you help me?