Atari Centipede Cocktail table game has no power

Arcade Collecting > Restorations & repair

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bperkins01:
Coins will fall straight through until the game is powered up and ready to accept coins. Its a pretty smart mechanism. There is a small solenoid that the PCB tells to engage when the game is ready. That way it doesn't take a quarter when its powered off.

You should be able to test for power with all the info you have however.. Just work you way out from the power supply...

vapuser:
Good morning all, Mike, thanks for that schematic image! huge help. Well I did more testing over the weekend. I started by creating some notes of the wiring harness to get a visual idea of the flow of things. See attachment. I first starting testing the power at the monitor's 3 pin connector. The voltage was 126.6 VAC. I also checked the voltage at the monitor's 6 pin plug - No Voltage. I continued to check the voltage at the coin mechanism. The voltage across pins 10 and 11 was 6.3 VAC. No other voltages at that plug were present. I also took apart and viewed the connectivity of the volume control, Self Test switch and the Coin switch. All seemed to be working fine. I don't know why the coin switch is a momentary type switch, wired in the (Normally Opened position). I'm not sure what that switch does. When I was checking out those switches I noticed that the ground wire from there was loose. So I cleaned the eyelet and tightened the screw. As I've been checking through the circuitry, I haven't noticed any other loose ground wires. Still no life. I'll continue testing.

bperkins01:
Still sounds like a bad ground connection.
You have voltage everywhere and nothing works.
I'd check the wiring harness for continuity from the first ground wire each step along the way..
ie. Positive power is getting all the way through the wire - but is getting stopped on the return side.

Clip one lead of the meter to a known good ground (post with green wire on power brick)
The test for continuity to everything else - starting at pin 4-5 on the power supply connector, then the ARII board, etc..
Your likely to find an open circuit very early - between the Power supply/ARII/PCB - since after the PCB most of the power fans out.
Do this with the power off on the machine.

fyi: the 6 pin connector for the monitor is the video wire (the HDMI connector of 1981)

Mike A:
If you have power to the 3 pin monitor plug then it is time to follow that power to where is stops on the monitor chassis. Hopefully it is a fuse. I will check my monitor schematic when I get off work today.

bperkins01:
Maybe I missed it along the way...
Is EVERYTHING dead? or just the monitor?

Just to catch up - is Anything working? or is the entire machine a brick.
Is the power LED on on the PCB?

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