Hi guys My brother and I are restoring this Big Red with an MVS single catridge Arcade. We already replaced the Chassis (429H) and the power supply. We have audio and controls. Video only sometimes.
What happens with video is that if we connect the AC GND we get this vertical noise on the screen and if we don't the video works sometimes. I don't see any connection between the chassis and AC GND.
I already checked a lot of time all the connections and even the AC is strictly as it should be (L, N, G).
I know Chassis 429H only has L and N in the power cord. JAMMA seems to be wired correctly and we haven't changed it. The new power supply is giving + 5V and +12V to the MVS with no problem.
Can someone tell us what the problem could be? I can't really understand why is this happening.
Any help is really appreciated!
Check the attached files for details.
What happens with video is that if we connect the AC GND we get this vertical noise on the screen and if we don't the video works sometimes. I don't see any connection between the chassis and AC GND.
I already checked a lot of time all the connections and even the AC is strictly as it should be (L, N, G).
I know Chassis 429H only has L and N in the power cord. JAMMA seems to be wired correctly and we haven't changed it. The new power supply is giving + 5V and +12V to the MVS with no problem.
Can someone tell us what the problem could be? I can't really understand why is this happening.
Any help is really appreciated!
Check the attached files for details.
