Amp connector on the way

Tonight was a fairly exciting night. I spoke with another really helpful, really intelligent collector who helped me understand something that should have been simple but I just didn’t see myself. The 2×3 AMP connector coming off the EZ20 monitor was indeed for the RGB Ground and Sync.

The Red and Green wires terminating in a molex connector were for the power, the colors and location were just throwing me for a loop. I looked at the old harness I took out, and sure enough, there was the 2×3 AMP connector, and then pigtailed off of that was a regular .156 headers for the RGB and sync as well as the ground as a seperate connector. Fortunately the wire colors were the same, so all I had to do was snip that whole piece off, and match up the same wires together on the original harness. I did have to “hack” the original a little bit, cutting off that RGB Sync and Ground connectors there, but in this instance at least I would have both options for the future no matter what monitor.

So, I matched up the wires, soldered them together, connected the 2×3 AMP and let the unused RGB sync and ground dangle, wrapped up the soldered wires in electrical tape and plugged it in.

I got a picture! Yes! Not only that, but I got sound! The picture is messed though. I just did new caps, and there seems to be a color missing the screen is really yellow.

This collector that helped me out on the phone also talked to me about the power supply. He says that Bob Roberts makes a kit to do some replacement of different parts on the power supply. The big blue capacitor can cause a lot of problems, and it also come with a new fuse block and fuses and some other stuff. He said this is worthwhile to get. He also said that the audio board is also actually a linear power supply, so it is important to get the schematic and see if it is putting off the correct voltages to the PCB, otherwise as I have learned lately, the incorrect voltages can damage the ROMS, RAMS, EPROMS and any other matter of things.

I still need to attach the AMP connector to the coin box so I can test that out. I hope to do that here in the next day or two.

Here are some similar arcade posts

• AMP connector arrives from Allied Electronics
• Installed a switcher in the Pengo
• Troubleshooting Pengo Power Supply
• Re-attached harness connector to Dig Dug
• Photos of Sega Pengo Isolation Transformer

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