Main > Main Forum
arcade wiring question (jpac) please help...
lostinarcade:
--- Quote from: mgb on August 14, 2011, 01:13:47 am ---yeah it looks like the ac in is wired wrong. I can't quite see the most bottom terminal but I see AC /L and AC /N. You have a wire going to AC /N (AC Neutral) but it doesn't appear that you have anything going to AC /L (ac live, or hot). I'm assuming that maybe the other ac wire is terminated to whatever terminal is below AC /N and that may be a ground or something.
Edit- now that I'm looking again, it appears that it just may look that way due to the angle. I know most power supplies have the ac on the bottom two terminals.
Have you metered for proper voltages?
--- End quote ---
no i have no checked the voltages. since everything works fine with the gameboard.
problem is the cabinet is not earthed there is no earth wire coming in from the wall, hence i need to know how to get the monitor on the cabinet to be earthed.
as u can see on the one pic there is a wire thats cut on the transfomer of the monitor, is that earth?
another thing is i will remove the gameboard powersupply, i just included it in the pics but it will be disconnected before the jpac will be plugged in.
also the problem with bob roberts stuff is hes using a diff transfomer for the monitor, also he has a ac line filter and a fuse on hes setup i dont have those in my cabinet, so looking at hes pictures is not the same as my cabinet.. only thing that is the same is .5 Switching Power Supply AKA Switcher.
another thing hes transfomer only has 2 wires going in and i dont see place for a 3rd. mine also has 2 going in, but there is a 3rd wire thats cut, so my question is whats that wire? is it ground?
mgb:
The only purpose of that transformer is to isolate the power to your monitor. the transformer doesn't typically have ground but the metal casing should be grounded.
I'm a little confused about whats not working because the power from that transformer goes to your monitor and you said your monitor works.
Also what monitor is in this cabinet. any arcade monitor that requires an isolation transformer, does not have ground. it just has neutral and hot and the metal casing gets grounded.
I may have missed it but what is definitely not working as of now.
lostinarcade:
--- Quote from: mgb on August 14, 2011, 08:33:29 pm ---The only purpose of that transformer is to isolate the power to your monitor. the transformer doesn't typically have ground but the metal casing should be grounded.
I'm a little confused about whats not working because the power from that transformer goes to your monitor and you said your monitor works.
Also what monitor is in this cabinet. any arcade monitor that requires an isolation transformer, does not have ground. it just has neutral and hot and the metal casing gets grounded.
I may have missed it but what is definitely not working as of now.
--- End quote ---
the problem is that i plugged in my computer into the jpac and it fried my motherboard (aka pc wont boot, just black when u turn on the power).
i just dont want to go and buy a new motherboard tom and have it do the same. i cant be 100% sure it was the jpac that caused this could have just been a coincidence.
here is what i did. installed soft 15 khz, power down my computer. carried it into the garage where the arcade machine is, plugged in the jpac. turn on the power and there was nothing on the arcade screen, then i plugged in my lcd and it did not boot. :angry:
so am i safe to asume that i wont blow another board and it was just coincidence?
lostinarcade:
this is pretty good line andy gave me.
"The first thing to check is that the frame of the monitor is connected to the power cord ground and also the PC case to ground, and the daisy chain of all the controls to ground."
guess thats how u ground this thing.
guess im also wondering whats that wire thats cut on the transfomer...?
mgb:
from the photos its hard to tell exactly where the wire goes to.
does it go into the windings of the transformer like the red cables? it may just be a seperate tap. for instance, one transformer may be able to take in multiple voltage inputs (and also there can be multiple output taps as well) so like one transformer may be able to take in either 120v or 240v.
if that cut wire is a ground, then it would just be going to the metal frame of the transformer. this can be verified with a continuity meter.
like Andy said, make sure you have good grounding from anything metal like the monitor frame, metal control panel parts, etc. because from what I hear, the jpac is sensitive to these issues