Reddogg
Active member
I've got a Pro Vision Tovis CGA monitor model MTG-1901 CN that worked perfectly, hardly used with an excellent picture, until I decided to switch cabs. In order to fit it in the new cab, I had to pound on the side of the monitor frame a little bit with a hammer. I know...not the best idea, but I only needed a little bit of clearance.
Anyway, after hooking it up in new cab, I can't get it to sync at all. It's not a pin issue. I have it hooked up the same as in first cab, composite to neg hor sync, and all I get is what looks like CRAZY vert and hor scrolling going on, with a high pitched whining sound (similar to a bad flyback). Adjusting the vert and hor hold does nothing, and if I disconnect the sync pin from the monitor harness, the whining sound stops (so doesn't indicate bad flyback), and the crazy scrolling on the screen settles down a bit, but of course still does not sync.
I then tried it in the first cab again, where it used to work beautifully, but now the same problem.
Apparently, the shock of hitting the frame with a hammer broke something in the vert hold, or hor hold, or the oscillator section...maybe?
Stupid idea to hit frame with hammer! But, I was nowhere near any components when I did it.
NOW I had the bright idea to remove the chassis, and examined it,but I can't see any broken solder points/joints, or any broken pots.
Anyone experience this before, or know where to look?
Thanks.
Anyway, after hooking it up in new cab, I can't get it to sync at all. It's not a pin issue. I have it hooked up the same as in first cab, composite to neg hor sync, and all I get is what looks like CRAZY vert and hor scrolling going on, with a high pitched whining sound (similar to a bad flyback). Adjusting the vert and hor hold does nothing, and if I disconnect the sync pin from the monitor harness, the whining sound stops (so doesn't indicate bad flyback), and the crazy scrolling on the screen settles down a bit, but of course still does not sync.
I then tried it in the first cab again, where it used to work beautifully, but now the same problem.
Apparently, the shock of hitting the frame with a hammer broke something in the vert hold, or hor hold, or the oscillator section...maybe?
Stupid idea to hit frame with hammer! But, I was nowhere near any components when I did it.
NOW I had the bright idea to remove the chassis, and examined it,but I can't see any broken solder points/joints, or any broken pots.
Anyone experience this before, or know where to look?
Thanks.