I've got a Tempest machine that seems to have a collapse issue on the X-axis. (I think that's technically the vertical, but of course the monitor is turned sideways.)
However, the collapse isn't down to absolutely a flat line. It's about a fingernail-width wide bar. When I play with the X axis pots on the PCB, the X CTR is the only one that does anything: it moves that thin bar of the game screen back & forth on the monitor. So, that makes me think the monitor might be okay and that this is actually a game board issue.
I've recapped the 6100, installed an LV2000, replaced & retested all the frame transistors, reflowed solder on every point on the deflection board.
I found this "Tempest Project" page that mentions replacing MC1495 ICs on the game PCB to address a collapse. Could that be what I'm looking at?
However, the collapse isn't down to absolutely a flat line. It's about a fingernail-width wide bar. When I play with the X axis pots on the PCB, the X CTR is the only one that does anything: it moves that thin bar of the game screen back & forth on the monitor. So, that makes me think the monitor might be okay and that this is actually a game board issue.
I've recapped the 6100, installed an LV2000, replaced & retested all the frame transistors, reflowed solder on every point on the deflection board.
I found this "Tempest Project" page that mentions replacing MC1495 ICs on the game PCB to address a collapse. Could that be what I'm looking at?

