Where the CPU board gets its power

The CPU board's +5 V and +12 V come from the power driver board into connector J210. Check voltage there when a CPU board seems dead.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Voltages made by the WPC power driver board
• Supplies made on the WPC power driver board
• WPC power driver bridge rectifiers and +5 V regulator
• Driver board LED4 off and the game won't boot (WPC-S and earlier)
• Driver board LED7 off (+12 V unregulated)
• Driver board LED1 off: switch matrix 12 V missing (WPC-S and earlier)
• WPC-95: all the 20 V coils dead, fuse good
• Shorted or open bridge rectifiers

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part One, Clay Harrell (pinrepair.com)