Star Gate questions

spanks_4

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Working on a Williams SG for a friend that had the boards repaired by some guy. Well the guy sent a computer type power supply back to use and labeled most of the connectors to go to different boards. The only things I can't get to work are the control panel and the coin door.

History: Someone hacked in a switching power supply and did a number on the wiring.

Q: What color wires are the CP and coin door ground wires? Also on the CPU board their is a 3 slot connector *very top left side that has two pins* that is missing. Anyone know what this connector is supposed to be for?
 
The 3 pin connector is the memory protect. It goes to a Cherry SPST momentary contact switch that is closed when the coin door is closed. It is used to protect the CMOS from accidental overwrites when the coin door is not open.

The Coin door ground goes to the original linear power supply ground via the coid door power connector. If that board is not there, you will need to tie the ground from the switcher to the Black Orange wire connecting to pin 6, 13 & 4 of the coin door harness connector (the 15 pin almost square connector in the harness between the ROM card and the coin door). That same wire will alos go to the cash box advance button and the other side of the memory protect switch.


You will need to connect the control panel (Orange Black wire) ground to pin 10 of the I/O board connection 3J2.

It is all layed out in the Cabinet Wiring Diagram of the Stargate drawing set (if you don't have it, you can download it from ArcArc.Xmission.com. Look in the Williams PDF section.).

ken
 
Is it possible just to take the ground from the CP and CD and tie it into ground on the atx power supply in the game? Instead of having to tape into harness pins?
 
Yes. Assuming the original power supply board is gone.

Most knowlegable hackers leave the old transformer and power supply board to supply power for the coin door, as documented on Bob Roberts site, just because switchers don't supply the 6.3 VAC for the coin door lights and the harness is already set up to tie the CP and CD grounds to the coin door power connector on the power supply board.

ken
 
I found it right after I posted that lol! Hopefully tomorrow I will have this done, DK done *button swap*, and the gumball machine lock picked....
 
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