John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum

Having issues with my monitor.

I changed the fuses on the monitor and it turns on..

Ok, so I got the monitor to start up. I bought new fuses and that seemed to do the job.
I do think there is an issue with some of the wiring.

1) First Picture has a wire coming from the "Yoke" of the monitor. I would assume this goes to the monitor board, but don't see where this would go.. Anyone have an idea?

2) The wire with a circle comes from the power supply.. Where does this attach to? I am assuming that it isn't a ground.

3) The chassis it self wasn't bolted down. Do you have to have spacers like a computer motherboard between this and the monitor frame? Also, all the metal you can see right here is electrified. I was shocked  :angry:a couple times trying to figure this one out,

Also, using a three pong power plug, it won't turn on. I accidentlly used a tv plug, no ground, and it turns on. So I am guessing there is a ground issue.

(http://i.imgur.com/O5JGqsz.gif)
(http://i.imgur.com/JSvkHsd.gif)
(http://i.imgur.com/3S7JmPU.gif)
Any help would be greatly appreciated.

Copied from the other thread:



Now that im not on my phone I can see the photos properly, you just need to screw the chassis's metal frame right to the metal frame of the monitor, failure to do so properly may cause damage to the game PCB.

The green wire just needs to attach to any metal surface on the frame.

The black wire i am still not sure about but often times the neckboard needs a solid ground connection back to the main chassis so maybe its that. This monitor uses a 4 pin yoke plug so it can't be from that. The only other idea i have is its for the deguassing coil.

I think the reason why it doesn't work when you tried the three prong plug is that earth ground is not the same potential as frame ground when not using a transformer. I am surprised it didn't make a big pop sound and blow a few traces off the board.