blitz_8255
Member
You could have lost the ground supplied to the lamp drivers (scr).
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Motordome Left Ball Save Gate Issue
- Thread starter jeff412
- Start date
jeff412
New member
How could I have lost the ground? Is there a possible single point of failure?
Jeff
Jeff
blitz_8255
Member
The circuit board should have a common trace to all the scr's and it should go to a connector pin or pins.
Did you look at the pages I listed in the Atlantis manual? It has a good step by step.
Did you look at the pages I listed in the Atlantis manual? It has a good step by step.
jeff412
New member
Yes I looked at the Atlantis manual, but it didn't cover my issue. It was for single light problems or groups, but not all. I'll get back after it tonight after work. It has to be something obvious.
Jeff
Jeff
blitz_8255
Member
The bottom of page 6-19 shows the flow of power for the phase lights from the transformer to the playfield, backbox, and controller board. Maybe a bad connection somewhere along the way.
jeff412
New member
I don't think it could be a connection. I have 11 VAC to all of the lights. That is supplied by 2 wires. One for A phase and one for B phase. Each light then has its own return and all of those come back on 3 separate connectors. I'm leaning toward your theory of a cut trace somewhere on the board. I'll dig into it tonight.
Jeff
Jeff
blitz_8255
Member
A bad connection will allow a digital voltmeter measure the voltage present but won't allow enough current to flow to light a light. You should be able to ground the non-common side of the lights and make them light up. There is a common ground wire from the transformer section that runs all the phase lights. Pins 9, 10, and 11 of the transformer plug run the phase lights. Violet-black, violet-red and violet, with violet-black, pin 9, being the common ground. Use a jumper on pin 9 and touch the lamps to see if they light up.
jeff412
New member
I found it! Strange thing. The connector that comes from the power supply to J1 on the 6803 board evidently was changed by a previous owner. They didn't put the right size connector on it and it was 1 pin short. I just assumed it was supposed to be that way. Anyway pin 1 was left empty. This is the ground for the phase lights. I guess before it was just seeking ground from somewhere else. Anyway, after I grounded pin 1 the lights are back. I'm just going to replace the entire connector and fix it correctly. Hopefully tonight this thing can go back in the gameroom. It's actually a pretty fun pin, regardless what everyone says.
blitz_8255
Member
Good stuff!! perserverence pays off!
Last edited:
jeff412
New member
Couldn't have done it without you. It's good to have someone to bounce ideas off of. I wish I could change the name of this thread. The title really doesn't apply to the entire thing. I think it could be very useful to others with 6803 games.
Thanks again,
Jeff
Thanks again,
Jeff
blitz_8255
Member
Glad I could help. The thread did kinda drift away from the ball gate now didn't it?!!! Did You ever figure out the bright lamps??
jeff412
New member
Bright lights were broken wires somewhere in the harness. I'm just going to replace the wires. Not even going to mess with trying to find the break. I temporarily ran a wire around to test and the brights worked correctly. Got any idea what size wire to use? I'm guessing 18 awg.
Jeff
Jeff
blitz_8255
Member
That should work just fine.
