Line cord wiring and polarity
On a round cord the black wire is hot (to the brass screw on the plug), white is neutral (silver screw) and green is ground (green screw on the round pin). On a flat two-wire cord the ribbed side is neutral and the smooth side is hot. The hot side is the one switched by the power switch. On a two-prong wall plug the narrow blade is hot; previous rewiring may have reversed things, so check before relying on it.
The power cord, main fuse, on-off switch, transformer primary and service outlet carry 110-120 V line voltage, which can kill. Unplug the game first.
Systems
- Williams System 3
- Williams System 4
- Williams System 6 / 6A
- Williams System 7
- Williams System 9
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
- WPC Alpha-Numeric
- WPC Dot Matrix
- WPC Fliptronics
- WPC DCS
- WPC-Security (WPC-S)
- WPC-95
- Bally MPU AS-2518-17
- Bally MPU AS-2518-35
- Stern MPU-100
- Stern MPU-200
- Bally 6803
- Gottlieb System 1
- Gottlieb System 80
- Gottlieb System 80A
- Gottlieb System 80B
- Gottlieb System 3
- Data East CPU Version 1/2
- Data East CPU Version 3
- Data East/Sega CPU Version 3b
- Capcom
- Electro-mechanical
Related tips
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)