Dot matrix display supply voltages

The controller board makes the display voltages (+5 V comes from the driver board): +62 V, +12 V logic, -125 V and -113 V. The display is a 128 by 32 gas discharge panel.

The dot matrix supply makes over 100 volts DC (+62, -113 and -125 V); keep fingers off the display and controller board while powered.

Systems

• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)

Related tips

• Dot matrix display power connector pinout and voltages
• Rebuilding the dot matrix high voltage section
• Dot matrix display blank or faulty
• One or two display columns stuck on
• Resets caused by a failing dot matrix display
• What the WPC dot matrix controller does
• Dot matrix display faults
• Blank display, garbage or diagonal lines: reseat ribbon cables

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