Hi all,
as someone said in this forum, this monitor should be a Hantarex MTC9000A (or it is a MTC9000 European model).
First thing - Jailbars. I have already ordered the capacitors needed and will replace them all on the chassis. Hopefully, this wil solve the problem. (Picture 1)
Second, it has visible retrace lines. Will the cap kit solve this, too?
Third, there is some problem with the brightness / contrast. I have tried to adjust it, but the best I can get isn't quite satisfying. I have forgotten to take a picture, but I've simulated it in a screenshot from mame. (picture 2 - regular mame screenshot, picture 3 - simulated monitor screenshot). How to get around this issue? I have also attached the pictures from the game, you can clearly see that there *IS* a big difference.
Fourth, there is some strange noise in the form of lines on the screen, it is visible even if I disconnect the game board. I don't have a clue what would cause that.
And the last one, it looks like the flyback was changed at some point. When I took the monitor apart to clean the dust from the chassis, I found out that there are some broken tracks which are directly connected to the flyback, and that some pins of the flyback aren't soldered at all (picture 5). Since the monitor is working, should I repair those tracks and solder the remaining pins of the flyback to the chassis? My grandfather always told me "If it ain't broken, don't fix it", but this really bothers me.
[edit]
I have added a annotated picture with the broken tracks and unsoldered pins. One of those tracks and two unsoldered pins are clearly a ground for the flyback. Could this cause the noise I am seeing on the screen?